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Journal articles on the topic 'Pd(II) chemistry'

Author: Grafiati

Published: 9 March 2023

Last updated: 10 March 2023

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1

Semba, Kazuhiko, Naoki Ohta, Fritz Paulus, Masaki Ohata, and Yoshiaki Nakao. "Merging Pd 0 /Pd II Redox and Pd II /Pd II Non‐redox Catalytic Cycles for the Allylarylation of Electron‐Deficient Alkenes." Chemistry – A European Journal 27, no. 15 (February 16, 2021): 5035–40. http://dx.doi.org/10.1002/chem.202100075.

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2

Kim, Mieock, Thomas J. Taylor, and François P. Gabbaï. "Hg(II)···Pd(II) Metallophilic Interactions." Journal of the American Chemical Society 130, no. 20 (May 2008): 6332–33. http://dx.doi.org/10.1021/ja801626c.

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3

Pregosin, Paul S., and Franz Wombacher. "Interactions and 2D NOESY. Pd(II) and Pt(II) cylometallation chemistry." Magnetic Resonance in Chemistry 29, no. 13 (October 1991): S106—S117. http://dx.doi.org/10.1002/mrc.1260291319.

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4

Lippert, Bernhard, and Pablo J. Sanz Miguel. "Comparing Pt II - and Pd II -nucleobase coordination chemistry: Why Pd II not always is a good substitute for Pt II." Inorganica Chimica Acta 472 (March 2018): 207–13. http://dx.doi.org/10.1016/j.ica.2017.06.047.

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5

Konstantinovic, Sandra, Blaga Radovanovic, Zoran Todorovic, and Slavica Ilic. "Spectrophotometric study of Co(II), Ni(II), Cu(II), Zn(II), Pd(II) and Hg(II) complexes with isatin-β-thiosemicarbazone." Journal of the Serbian Chemical Society 72, no. 10 (2007): 975–81. http://dx.doi.org/10.2298/jsc0710975k.

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The composition and stability of the complexes of isatin-?-thiosemicarbazone with Co(II), Ni(II), Cu(II), Zn(II), Pd(II) and Hg(II) have been investigated using spectrophotometric method at 30?C and constant ionic strength of 0.1 mol dm-3 (KNO3) in 70 % ethanol. Experimental results indicate the formation of MeL and MeL2 complexes for Ni(II) and Co(II), and MeL for Cu(II), Zn(II), Pd(II) and Hg(II) complexes, whose stability constants, ?n, have been calculated using a computerized iterative method of successive approximation.

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6

Krylova, L. F., L. M. Kovtunova, and G. V. Romanenko. "Pt(II) and Pd(II) Complexes with -Alanine." Bioinorganic Chemistry and Applications 2008 (2008): 1–10. http://dx.doi.org/10.1155/2008/983725.

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A sequence of stages in the syntheses of isomeric bisamino acid complexes of Pt(II) with -aminopropionic acid (-alanine = -AlaH) has been studied by the NMR spectroscopy. The techniques have been developed of the synthesis of thecis- andtrans-bischelates of Pt(II) and Pd(II) with -alanine as well as of the halide complexes oftrans- (M = Pt, Pd) andtrans- types. The NMR spectroscopy and IR spectroscopy (in the nuclei of ) and X-ray diffraction analysis have been used to examine the structures of the synthesized compounds.

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7

Mashima, Kazushi, Asuka Shima, Keisuke Nakao, Atsushi Fukumoto, Yutaka Kaneda, and Yoshitaka Kusumi. "Oxidative Reactions of Tetrametal Pd(0)···Mo(II)Mo(II)···Pd(0) Clusters: Electrochemical Communication of Two Pd(0) Centers through the Mo2Moiety and Oxidative Formation of a Pd(I)Mo(II)Mo(II)Pd(I) Array." Inorganic Chemistry 48, no. 5 (March 2, 2009): 1879–86. http://dx.doi.org/10.1021/ic801398f.

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8

Yaman, Şeniz Özalp, Ahmet M. Önal, and Hiüseyin Isci. "Spectro-Electrochemistry of Diethyldithiocarbamate Complexes of Ni(II), Pd(II) and Pt(II)." Zeitschrift für Naturforschung B 56, no. 2 (February 1, 2001): 202–8. http://dx.doi.org/10.1515/znb-2001-0212.

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Abstract The electrochemical behaviour of Na(Et2NCS2) and M(Et2NCS2)2 (M= Ni(II), Pd(II) and Pt(II); Et2NCS2-= diethyldithiocarbamate) as studied by cyclic voltammetry in the acetonitrile-( n-Bu)4NBF4 solvent-electrolyte couple at room temperature vs. Ag/Ag+ reference electrode. Constant potential electrolyses of the complexes were carried out at their first oxidation peak potentials and monitored in situ by UV-VIS spectrophotometry. The electrolysis of Ni(Et2NCS2)2 in solution yielded the dimer of the ligand, (Et2NCS2)2, and Ni2+(sol) as final products. During this electrochemical process the formation of a Ni(III) complex species as an intermediate has been observed. The electrochemical oxidation of bis(diethyldithiocarbamato) complexes of Pd(II) and Pt(II) yielded [Pd(Et2NCS2)3]+ and [Pt(Et2NCS2)3]+, respectively.

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9

Tagne Kuate, Alain C., Roger A. Lalancette, Thomas Bannenberg, Matthias Tamm, and Frieder Jäkle. "Diferrocenylmercury diphosphine diastereomers with unique geometries: trans-chelation at Pd(ii) with short Hg(ii)⋯Pd(ii) contacts." Dalton Transactions 48, no. 35 (2019): 13430–39. http://dx.doi.org/10.1039/c9dt02728a.

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10

Maltceva, Olga V., Natalya V. Chizhova, Roman S. Kumeev, and Nugzar Zh Mamardashvili. "Tetraphenyltetrabenzoporphyrinates of Ni(II), Pd(II), Pt(II) and Pt(IV)." Macroheterocycles 10, no. 1 (2017): 68–71. http://dx.doi.org/10.6060/mhc160541c.

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11

Cervantes, G., V. Moreno, E. Molins, and M. Quirós. "Pd(II) and Pt(II) D-penicillamine complexes. Crystal structure of a tridentate D-penicillamine cluster of Pd(II)." Polyhedron 17, no. 19 (September 1998): 3343–50. http://dx.doi.org/10.1016/s0277-5387(98)00114-4.

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12

Prasad, Sana Siva, Bandameeda Ramesh Naidu, Marlia M. Hanafiah, Jangam Lakshmidevi, Ravi Kumar Marella, Sivarama Krishna Lakkaboyana, and Katta Venkateswarlu. "Porphyrin N-Pincer Pd(II)-Complexes in Water: A Base-Free and Nature-Inspired Protocol for the Oxidative Self-Coupling of Potassium Aryltrifluoroborates in Open-Air." Molecules 26, no. 17 (September 4, 2021): 5390. http://dx.doi.org/10.3390/molecules26175390.

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Metalloporphyrins (and porphyrins) are well known as pigments of life in nature, since representatives of this group include chlorophylls (Mg-porphyrins) and heme (Fe-porphyrins). Hence, the construction of chemistry based on these substances can be based on the imitation of biological systems. Inspired by nature, in this article we present the preparation of five different porphyrin, meso-tetraphenylporphyrin (TPP), meso-tetra(p-anisyl)porphyrin (TpAP), tetrasodium meso-tetra(p-sulfonatophenyl)porphyrin (TSTpSPP), meso-tetra(m-hydroxyphenyl)porphyrin (TmHPP), and meso-tetra(m-carboxyphenyl)porphyrin (TmCPP) as well as their N-pincer Pd(II)-complexes such as Pd(II)-meso-tetraphenylporphyrin (PdTPP), Pd(II)-meso-tetra(p-anisyl)porphyrin (PdTpAP), Pd(II)-tetrasodium meso-tetra(p-sulfonatophenyl)porphyrin (PdTSTpSPP), Pd(II)-meso-tetra(m-hydroxyphenyl)porphyrin (PdTmHPP), and Pd(II)-meso-tetra(m-carboxyphenyl)porphyrin (PdTmCPP). These porphyrin N-pincer Pd(II)-complexes were studied and found to be effective in the base-free self-coupling reactions of potassium aryltrifluoroborates (PATFBs) in water at ambient conditions. The catalysts and the products (symmetrical biaryls) were characterized using their spectral data. The high yields of the biaryls, the bio-mimicking conditions, good substrate feasibility, evading the use of base, easy preparation and handling of catalysts, and the application of aqueous media, all make this protocol very attractive from a sustainability and cost-effective standpoint.

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13

Saha, Debajyoti, and Nayim Sepay. "Fluxional chloro-pyrrole–Pd(ii) complex to cationic η2-pyrrole–Pd(ii) complex: subtlety in structure-directed bonding mode." New Journal of Chemistry 45, no. 24 (2021): 10594–98. http://dx.doi.org/10.1039/d1nj00866h.

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14

Roedel, J. Nicolas, Roman Bobka, Max Pfister, Martin Rieger, Bernd Neumann, and Ingo-Peter Lorenz. "Synthesis and Structural Characterization of Bis(aziridine) Cobalt(II), Zinc(II) and Palladium(II) Complexes." Zeitschrift für Naturforschung B 62, no. 8 (August 1, 2007): 1095–101. http://dx.doi.org/10.1515/znb-2007-0812.

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The reactions of anhydrous metal chlorides MCl2 [M = Co(II), Zn(II), Pd(II)] with aziridines (az) in CH2Cl2 at r. t. in a 1 : 5 molar ratio afforded the bis(aziridine)dichloro complexes M(az)2Cl2. After purification, all complexes were fully characterized. The solid state structures were determined using single crystal X-ray diffraction, and showed tetrahedral coordination geometries for the Co(II) and Zn(II) centers and trans-configurated square planar geometries for Pd(II).

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15

Shi, Min, Yu Chen, and Bo Xu. "Pd(II)- and Pd(0)-Cocatalyzed Reactions of Sulfonamides with MCPs." Organic Letters 5, no. 8 (April 2003): 1225–28. http://dx.doi.org/10.1021/ol034146p.

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16

Grasa, Gabriela A., Rohit Singh, Edwin D. Stevens, and Steven P. Nolan. "Catalytic activity of Pd(II) and Pd(II)/DAB-R systems for the Heck arylation of olefins." Journal of Organometallic Chemistry 687, no. 2 (December 2003): 269–79. http://dx.doi.org/10.1016/s0022-328x(03)00375-9.

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17

Fregona, D., L. Giovagnini, L. Ronconi, C. Marzano, A. Trevisan, S. Sitran, B. Biondi, and F. Bordin. "Pt(II) and Pd(II) derivatives of ter-butylsarcosinedithiocarbamate." Journal of Inorganic Biochemistry 93, no. 3-4 (January 2003): 181–89. http://dx.doi.org/10.1016/s0162-0134(02)00571-8.

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18

Paduraru, Carmen, Doina Bilba, Ioan Sarghie, and Lavinia Tofan. "A sorption study of Pd(II) on aminomethylphosphonic Purolite resin S-940." Journal of the Serbian Chemical Society 70, no. 10 (2005): 1205–12. http://dx.doi.org/10.2298/jsc0510205p.

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Many methods for the preconcentration-recovery of platinic metals are based on complexing sorbents. As platinic metals have a high tendency to form com plexes, the complex-forming sorbents are particularly useful. This study concerns the sorption of Pd(II) on aminomethylphosphonic Purolite S-940 resin. In order to establish the optimum conditions of Pd(II) sorption on S-940 resin, the influence of the following experimental conditions: solution pH, Pd(II) initial concentration and temperature were studied. The yield of Pd(II) recovery was maximum in buffer solutions of pH 3?5 and decreases with increasing initial concentration of the solution. The equilibrium distribution of Pd(II) between the two phases (sorbent and solution) is described by the Langmuir model of monomolecular layer adsorption. The thermodynamic quantities characteristic for the Pd(II) sorption process suggest an affinity of the Purolite resin S-940 for Pd(II).

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19

Turan, Nevin, Kenan Buldurun, Naki Çolak, and İsmail Özdemir. "Preparation and spectroscopic studies of Fe(II), Ru(II), Pd(II) and Zn(II) complexes of Schiff base containing terephthalaldehyde and their transfer hydrogenation and Suzuki-Miyaura coupling reaction." Open Chemistry 17, no. 1 (September 25, 2019): 571–80. http://dx.doi.org/10.1515/chem-2019-0074.

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AbstractThis study describes synthesis, spectroscopic characterization and catalytic activities of Fe(II), Ru(II), Pd(II) and Zn(II) complexes with a novel Schiff base ligand (L) derived from methyl 2-amino-5,5,7,7-tetramethyl-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate and terephthalaldehyde. We used spectroscopic techniques including IR, UV-Vis, 1H-NMR, 13C-NMR, elemental analysis and also mass analysis and magnetic susceptibility measurements to identify the products. The Pd(II) complex was used as a potential catalyst for Suzuki-Miyaura coupling reaction of some aryl halides under optimized conditions. The effect of various bases such as NaOH, KOH, and KOBut was investigated in transfer hydrogenation (TH) of ketones by isopropyl alcohol as the hydrogen source. Ru(II) and Pd(II) complexes showed catalytic activity while Zn(II) and Fe(II) metal complexes failed to do that.

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20

Caruso, Ugo, Barbara Panunzi, Antonio Roviello, Marco Tingoli, and Angela Tuzi. "Two aminobenzothiazole derivatives for Pd(II) and Zn(II) coordination." Inorganic Chemistry Communications 14, no. 1 (January 2011): 46–48. http://dx.doi.org/10.1016/j.inoche.2010.09.027.

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21

Guerrero, Miguel, José A. Pérez, Teresa Calvet, Mercè Font-Bardía, and Josefina Pons. "Pd(II) and Pt(II) Coordination Chemistry with Hybrid Pyridine-Pyrazole Ligands: from 3D-Frameworks Structures in Molecular Complexes." Australian Journal of Chemistry 66, no. 6 (2013): 685. http://dx.doi.org/10.1071/ch13021.

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In this paper we studied the reaction of ligands 2-[5-phenyl-1-(3,6,9-trioxodecane)-1H-pyrazol-3-yl]pyridine (L1) and 3,5-bis(2-pyridyl)-1-(3,6,9-trioxodecane)-1H-pyrazole (L2) with [MCl2(CH3CN)2] (M = Pd(ii), Pt(ii)), to obtain monomeric complexes [MCl2(L)] (M = Pd(ii): L = L1 (1), L = L2 (2); M = Pt(ii): L = L1 (3), L = L2 (4)). Additionally, the reaction of [Pd(CH3COO)2] with L1 (5) and L2 (6) was also studied pointing out dimeric structures with bridged acetates between the Pd(ii) atoms. All complexes were characterised by elemental analyses, conductivity measurements, infrared spectroscopy (IR), 1H, 13C{1H}, and 195Pt{1H} NMR spectroscopies, and electrospray ionisation mass spectrometry (MS-ESI(+)). The crystal structure of complex [PtCl2(L1)] (3) was determined by X-ray diffraction methods; it consists of a mononuclear complex where L1 acts as a bidentate chelate ligand. Moreover, we also studied the extended structure observing that the ether, present in the alkyl chain of the ligand, chlorine, and platinum moieties play a fundamental role in the final disposition of the supramolecular structure. All these results show how the design of an appropriate hybrid ligand can strongly influence the structural control of the molecular packing.

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22

Cárdenas, Diego J., Belén Martín-Matute, and Antonio M. Echavarren. "Aryl Transfer between Pd(II) Centers or Pd(IV) Intermediates in Pd-Catalyzed Domino Reactions." Journal of the American Chemical Society 128, no. 15 (April 2006): 5033–40. http://dx.doi.org/10.1021/ja056661j.

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23

Nikonov, G. N., A. A. Karasik, E. V. Malova, and K. M. Enikeev. "Aminomethylphosphines in template synthesis on Pt(II), Pd(II), and Hg(II)." Heteroatom Chemistry 3, no. 4 (August 1992): 439–42. http://dx.doi.org/10.1002/hc.520030420.

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24

Bailey, Wilson D., Alexander S. Phearman, Lapo Luconi, Andrea Rossin, Dmitry G. Yakhvarov, Lucia D'Accolti, Sarah E. Flowers, et al. "Hydrogenolysis of Dinuclear PCN R Ligated Pd II μ‐Hydroxides and Their Mononuclear Pd II Hydroxide Analogues." Chemistry – A European Journal 25, no. 42 (July 3, 2019): 9920–29. http://dx.doi.org/10.1002/chem.201900507.

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25

Poirier, Stéphanie, Philippe Guionneau, Dominique Luneau, and Christian Reber. "Why do the luminescence maxima of isostructural palladium(II) and platinum(II) complexes shift in opposite directions?" Canadian Journal of Chemistry 92, no. 10 (October 2014): 958–65. http://dx.doi.org/10.1139/cjc-2014-0127.

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Temperature-dependent luminescence spectra for a series of palladium(II) and platinum(II) complexes with thiocyanate, halide, and dithiocarbamate ligands are presented. All complexes show broad d−d luminescence. Crystal structures are reported for (n-Bu4N)2[Pt(SCN)4] and (n-Bu4N)2[Pd(SCN)4] at 150 and 250 K, for the palladium(II) dimethyldithiocarbamate (MeDTC) complex [Pd(MeDTC)2] at 150 and 300 K, and for its platinum(II) analog at 100 and 300 K. The structures of (n-Bu4N)2[Pt(SCN)4], (n-Bu4N)2[Pd(SCN)4], and [Pt(MeDTC)2] show similar volume increases with temperature. In contrast, the luminescence band maxima of palladium(II) and platinum(II) complexes have opposite shifts with increasing temperature. (n-Bu4N)2[Pd(SCN)4] shows a shift of −2.0 cm−1/K and [Pd(MeDTC)2] a shift of −1.1 cm−1/K, while both platinum(II) complexes have a positive shift of +1.6 cm−1/K. Calculated luminescence spectra with adjustable parameters reproduce the experimental spectra. The variation of their parameters with temperature shows the origin of different trends. Temperature-dependent luminescence spectra of [Pd(SCN)4]2− and [Pt(SCN)4]2− in polymer films of polyvinyl alcohol were measured. No clearcut shifts of maxima were observed for either compound, and their spectra are broader due to the disordered environment.

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26

Wang, Changqing, Sun Chau Siu, Germaine Hwang, Friedhelm Aubke, Christian Bach, Bianca Bley, Matthias Bodenbinder, and Helge Willner. "Homoleptic carbonyl cations of palladium(I), palladium(II), platinum(II), and gold(I)—simplified synthetic routes to their fluoroantimonate(V) salts." Canadian Journal of Chemistry 74, no. 11 (November 1, 1996): 1952–58. http://dx.doi.org/10.1139/v96-222.

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The original synthetic routes to the new noble metal carbonyl cations [Au(CO)2]+ and [M(CO)4]2+, M = Pd or Pt, as [Sb2F11]−salts are multi-step procedures that involve corrosive reagents and require commercially unavailable starting materials. We report here two general simplifications: (i) the sole use of liquid antimony(V) fluoride as reaction medium in a single-step carbonylation process, and (ii) the use of the commercially available chlorides AuCl3 and MCl2, M = Pd or Pt, as starting materials, in addition to the binary fluorosulfates Au(SO3F)3, Pd[Pd(SO3F)6], and Pt(SO3F)4. The simplified routes developed here for [Au(CO)2][Sb2F11] and [M(CO)4][Sb2F11]2, M = Pd or Pt, should make these new reagents more easily available for wider use in synthesis. In addition, these routes are found suitable for the generation of new carbonyl cations of electron-rich metals. Key words: metal carbonyl cations of Au(I), Pd(I), Pd(II), and Pt(II); solvolysis reactions in liquid SbF5, reductive carbonylation in liquid SbF5; carbonylations in strong acidic media.

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27

Vicens, Margarita, Amparo Caubet, and Virtudes Moreno. "Interaction of Pd(II) and Pt(II) Amino Acid Complexes With Dinucleotides." Metal-Based Drugs 4, no. 1 (January 1, 1997): 43–50. http://dx.doi.org/10.1155/mbd.1997.43.

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The interaction of the dinucleotides d(ApG) and d(ApA) with [Pd(aa)Cl2], where aa = L- or D-histidine or the methyl ester of L-histidine, and with [Pt(Met)Cl2], where Met = L-methionine was studied by H1 and C13 NMR and CD measurements. In the case of the L-histidine and L-histidineOMe, the reaction with d(ApG) appeared to give the bifunctional adducts Pd(L-Histidine)N1(1)N7(2) and Pd(L-HisOMe)N1(1)N7(2), but the behavior with D-histidine suggested the formation of the monofunctional adduct Pd(D-His)N7(2). The reaction of L-histidine with d(ApA) seemed to form the bimetallic adduct (L-His)PdN7(1)N7(2)Pd(L-His). The Pt(II)-L-methionine complex in both reactions with d(ApG) and d(ApA) seemed to yield mainly adducts Pt(L-Met)N7(1)N7(2) but the existence of adducts Pt(L-Met)N1(1)N7(2) cannot be ruled out.

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28

Pandey, Madhusudan K., Harish S. Kunchur, Guddekoppa S. Ananthnag, Joel T. Mague, and Maravanji S. Balakrishna. "Catechol and 1,2,4,5-tetrahydroxybenzene functionalized cyclodiphosphazane ligands: synthesis, structural studies, and transition metal complexes." Dalton Transactions 48, no. 11 (2019): 3610–24. http://dx.doi.org/10.1039/c8dt04819c.

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This paper describes the syntheses of two novel cyclodiphosphazane derivatives and their coordination chemistry with Cu^I, Ru^II, Rh^I, Pd^II and Au^I is also described.

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29

Mincheva, N., L. Ballester, L. Antonov, and M. Mitewaa. "A New Dimeric Pd(III)Pd(II) Complex with 7,7,8,8 Tetracyanoquinodimethane (TCNQ)." Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry 30, no. 9 (October 1, 2000): 1643–51. http://dx.doi.org/10.1080/00945710009351858.

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30

Li, Kelin, Yibin Zeng, Ben Neuenswander, and Jon A. Tunge. "Sequential Pd(II)−Pd(0) Catalysis for the Rapid Synthesis of Coumarins." Journal of Organic Chemistry 70, no. 16 (August 2005): 6515–18. http://dx.doi.org/10.1021/jo050671l.

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31

Vasic, Vesna, Jasmina Savic, and Nikola Vukelic. "Sorption-spectrophotometric method for the determination of Pd(II) in aqueous solutions." Journal of the Serbian Chemical Society 69, no. 4 (2004): 309–17. http://dx.doi.org/10.2298/jsc0404309v.

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The reaction of Pd(II) with 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalene 3-6-disulphonic acid (PACA) sorbed onto Dowex 1-X8 ion-exchange resin was investigated with the aim of developing an absorption-spectrophotometric analytical method for the determination of low Pd(II) concentrations in water. The immobilized reagent formed a 1:1 complex with Pd(II) having an absorption maximum at 650 nm. Parameters, such as pH, wavelength and contact time were optimised for a given amount of the sorbed reagent. The linearity range of absorbance vs. Pd(II) concentration extended from 5x10-6 ? 5x10-5 M 5x10-7 ? 5x10-6 and 2.5x10-8 ? 2.5x10-7 M when using 10, 100 and 200 ml of sample solution, respectively. With a 200 ml sample, the detection limit was 2.5x10-7 M Pd(II). Most metals, except Cu(II), did not interfere when present in up to 100 times the concentration of Pd(II).

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32

Kletsch, Lukas, Rose Jordan, Alicia S. Köcher, Stefan Buss, Cristian A. Strassert, and Axel Klein. "Photoluminescence of Ni(II), Pd(II), and Pt(II) Complexes [M(Me2dpb)Cl] Obtained from C‒H Activation of 1,5-Di(2-pyridyl)-2,4-dimethylbenzene (Me2dpbH)." Molecules 26, no. 16 (August 20, 2021): 5051. http://dx.doi.org/10.3390/molecules26165051.

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The three complexes [M(Me2dpb)Cl] (M = Ni, Pd, Pt) containing the tridentate N,C,N-cyclometalating 3,5-dimethyl-1,5-dipyridyl-phenide ligand (Me2dpb−) were synthesised using a base-assisted C‒H activation method. Oxidation potentials from cyclic voltammetry increased along the series Pt < Ni < Pd from 0.15 to 0.74 V. DFT calculations confirmed the essentially ligand-centred π*-type character of the lowest unoccupied molecular orbital (LUMO) for all three complexes in agreement with the invariant reduction processes. For the highest occupied molecular orbitals (HOMO), contributions from metal dyz, phenyl C4, C2, C1, and C6, and Cl pz orbitals were found. As expected, the dz2 (HOMO-1 for Ni) is stabilised for the Pd and Pt derivatives, while the antibonding dx2−y2 orbital is de-stabilised for Pt and Pd compared with Ni. The long-wavelength UV-vis absorption band energies increase along the series Ni < Pt < Pd. The lowest-energy TD-DFT-calculated state for the Ni complex has a pronounced dz2-type contribution to the overall metal-to-ligand charge transfer (MLCT) character. For Pt and Pd, the dz2 orbital is energetically not available and a strongly mixed Cl-to-π*/phenyl-to-π*/M(dyz)-to-π* (XLCT/ILCT/MLCT) character is found. The complex [Pd(Me2dpb)Cl] showed a structured emission band in a frozen glassy matrix at 77 K, peaking at 468 nm with a quantum yield of almost unity as observed for the previously reported Pt derivative. No emission was observed from the Ni complex at 77 or 298 K. The TD-DFT-calculated states using the TPSSh functional were in excellent agreement with the observed absorption energies and also clearly assessed the nature of the so-called “dark”, i.e., d‒d*, excited configurations to lie low for the Ni complex (≥3.18 eV), promoting rapid radiationless relaxation. For the Pd(II) and Pt(II) derivatives, the “dark” states are markedly higher in energy with ≥4.41 eV (Pd) and ≥4.86 eV (Pt), which is in perfect agreement with the similar photophysical behaviour of the two complexes at low temperatures.

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33

McFarlane, A., J. R. Lusty, J. J. Fiol, A. Terrón, E. Molins, C. Miravitlles, and V. Moreno. "Pd(II) and Pt(II) Complexes of 1,2-Bis(pyridin-2-yl)ethane-N,N'." Zeitschrift für Naturforschung B 49, no. 6 (June 1, 1994): 844–48. http://dx.doi.org/10.1515/znb-1994-0619.

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X-ray crystal structures and properties of the two Pd(II) and Pt(II) complexes [bpeH2][PdCl4] and [Pt(bpe)Cl2], [bpe = 1,2-bis(pyridin-2-yl)ethane] are described and correlated with the IR and 1H NMR/13C NMR spectroscopic data. In the case of the Pt(II) complex, the 1,2-bis(pyridin-2-yl)ethane is bound to the metal by the heterocycle nitrogen atoms but no direct bond is found in the case of the Pd(II) complex. The ligand exhibits low energy geometries in both compounds: the cis-conformation in the Pt(II) complex, and the transconformation in the Pd(II) complex

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34

Mihalache, Mădălina, Ticuţa Negreanu-Pîrjol, Florea Dumitraşcu, Constantin Drăghici, and Mirela Călinescu. "Synthesis, characterization and biological activity of new Ni(II), Pd(II) and Cr(III) complex compounds with chlorhexidine." Journal of the Serbian Chemical Society 83, no. 3 (2018): 271–84. http://dx.doi.org/10.2298/jsc170911119m.

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Six new coordination compounds of Ni(II), Pd(II) and Cr(III) with chlorhexidine, 1,1?-hexamethylenebis[5-(4-chlorophenyl)biguanide], were prepared, characterized and examined for their potential as antimicrobial agents, as well as for their antioxidant activity. The metal complexes correspond to the formulas: [Ni(CHX)]Cl2?2H2O, [Ni(CHX)]Br2?2H2O, [Ni(CHX)](CH3COO)2?C2H5OH, [Pd(CHX)][PdCl4]?2H2O, [Pd(CHX)](CH3COO)2 and [Cr(CHX)Cl2](CH3COO), where CHX = chlorhexidine. Investigations on the in vitro antimicrobial activity of the complexes indicated that all have high activity against the tested bacteria, but are less active against fungi. Among the six complexes, those of Pd(II) showed the highest antibacterial activity, [Pd(CHX)][PdCl4]?2H2O being more active against Gram-positive and Gram-negative bacteria than chlorhexidine diacetate. The antioxidant activity of the metal complexes was investigated by photochemiluminescence and the results showed that the palladium( II) complexes have high antioxidant activities.

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35

Andjelkovic, Katarina, Gordana Jakovljevic, Mario Zlatovic, Zivoslav Tesic, Dusan Sladic, Jonas Howing, and Roland Tellgren. "Synthesis and characterization of zinc(II), palladium(II) and platinum(II) complexes with 2’-[1-(2-pyridinyl)- ethylidene]oxamohydrazide: The crystal structure of biss2'-[1-(2-pyridinyl)ethylidene]oxa." Journal of the Serbian Chemical Society 69, no. 8-9 (2004): 651–60. http://dx.doi.org/10.2298/jsc0409651a.

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Complexes of Zn(II), Pd(II) and Pt(II) with 2?-[1-(2-pyridinyl)ethylidene ]oxamohydrazide (Hapsox) were synthesized and their structures were determined. All the complexes are of a neutral type with two apsox ligands coordinated to Zn(II) and one apsox ligand coordinated to Pd(II) or Pt(II). In each case, the polydentate was coordinated via pyridine and hydrazone nitrogens and ?-oxyazine oxygen, forming an octahedral geometry around Zn(II), and a square planar one around Pd(II) and Pt(II). The structure determination was performed by IR, 1H-NMR and 13C-NMR spectroscopy, and for the Zn(II) complex by X-ray structure analysis.

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36

Pankratov, A. N., V. B. Borodulin, and O. A. Chaplygina. "Ligand Exchange in Pd(II)-NaCl-H2O and Pd(II)-HCl-H2O Systems: Quantum-Chemical Consideration." Russian Journal of Coordination Chemistry 31, no. 9 (September 2005): 660–66. http://dx.doi.org/10.1007/s11173-005-0152-9.

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37

Ajibade, Peter A., and Omoruyi G. Idemudia. "Synthesis, Characterization, and Antibacterial Studies of Pd(II) and Pt(II) Complexes of Some Diaminopyrimidine Derivatives." Bioinorganic Chemistry and Applications 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/549549.

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Pd(II) and Pt(II) complexes of trimethoprim and pyrimethamine were synthesized and characterized by elemental analysis, UV-Vis, FTIR, and NMR spectroscopy. The complexes are formulated as four coordinate square planar species containing two molecules of the drugs and two chloride or thiocyanate ions. The coordination of the metal ions to the pyrimidine nitrogen atom of the drugs was confirmed by spectroscopic analyses. The complexes were screened for their antibacterial activities against eight bacterial isolates. They showed varied activities with the active metal complexes showing more enhanced inhibition than either trimethoprim or pyrimethamine. The Pd(II) complexes of pyrimethamine showed unique inhibitory activities againstP. aeruginosaandB. pumilus, and none of the other complexes or the drugs showed any activity against these bacteria isolates. The MIC and MBC determinations revealed that these Pd(II) complexes are the most active. Structure activity relationship showed that Pt(II) complexes containing chloride ions are more active, while for Pd(II) complexes containing thiocyanate ions showed more enhanced activity than those containing chloride ions.

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38

Casas, J. L., E. Gayoso, J. M. Vila, M. T. Pereira, and M. Gayoso. "Cyclometallated Compounds of Pd(II) with Benzalazines." Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry 21, no. 2 (February 1991): 263–73. http://dx.doi.org/10.1080/15533179108020181.

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39

Bedford, Robin B., Michael Betham, Craig P. Butts, Simon J. Coles, Marica Cutajar, Thomas Gelbrich, Michael B. Hursthouse, P. Noelle Scully, and Stephen Wimperis. "Five-coordinate Pd(ii) orthometallated triarylphosphite complexes." Dalton Trans., no. 4 (2007): 459–66. http://dx.doi.org/10.1039/b613524b.

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40

Aarts, A. J., H. O. Desseyn, and M. A. Herman. "Pd(II) Complexes with N-Methyl Thiobenzamide." Bulletin des Sociétés Chimiques Belges 88, no. 1-2 (September 1, 2010): 25–29. http://dx.doi.org/10.1002/bscb.19790880104.

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41

Tardiff, Bennett J., Joshua C. Smith, Stephen J. Duffy, Christopher M. Vogels, Andreas Decken, and Stephen A. Westcott. "Synthesis, characterization, and reactivity of Pd(II) salicylaldimine complexes derived from aminophenols." Canadian Journal of Chemistry 85, no. 5 (May 1, 2007): 392–99. http://dx.doi.org/10.1139/v07-036.

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Schiff bases, derived from the condensation of salicylaldehydes with 3- and 4-aminophenol, reacted with palladium(II) acetate to give the corresponding bis(N-arylsalicylaldiminato)palladium(II) complexes. These complexes have been found to be active catalysts for the Suzuki–Miyaura cross-coupling of aryl bromides and iodides with aryl boronic acids, using water as a solvent.Key words: cross-coupling, green chemistry, palladium, salicylaldimines, Schiff base, Suzuki–Miyaura.

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42

Preuß, Andrea, Marcus Korb, Tobias Rüffer, Jörn Bankwitz, Colin Georgi, Alexander Jakob, Stefan E. Schulz, and Heinrich Lang. "A β-ketoiminato palladium(II) complex for palladium deposition." Zeitschrift für Naturforschung B 74, no. 11-12 (December 18, 2019): 901–12. http://dx.doi.org/10.1515/znb-2019-0172.

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AbstractThe ¦-ketoiminato complex [Pd(OAc)L] (3) can be synthesized by the reaction of bis(benzoylacetone)diethylenetriamine (1, = LH) with [Pd(OAc)2] (2). The structure of 3 in the solid state has been determined by single X-ray diffraction analysis. Complex 3 crystallizes as a dimer (32), which is formed by hydrogen bonds between NH and OOAc functionalities of two adjacent ligands. Each of the Pd atoms is complexed by one ON2 donor unit of the polydentate ligand L− and an acetate group. Pd–Pd interactions and hydrogen bond formation between a NH and the C=O acetate moiety lead to a [4 + 2] coordination at Pd. The non-coordinated part of L exists in its ¦-keto-enamine form. The thermal decomposition behavior of 32 was studied by TG (thermogravimetry) and TG-MS showing that 32 decomposes between 200 and 500°C independent of the applied atmosphere. Under oxygen PdO is produced, while under argon Pd is formed as confirmed by PXRD measurements. Complex 32 was applied as a spin-coating precursor (conc. 0.1 mol L−1, volume 1.5 mL, 3000 rpm, deposition time 6 min, heating rate 50 K min−1, holding time 60 min (Ar) and 120 min (air) at T = 800°C). The as-obtained samples are characterized by granulated particles of Pd/PdO on the substrate surface. EDX (energy-dispersive X-ray spectroscopy) and XPS (X-ray photoelectron spectroscopy) measurements confirmed the formation of Pd (Ar) or PdO (O2) with up to 12 mol% C impurity.

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43

Whitehurst, William G., J. Henry Blackwell, Gary N. Hermann, and Matthew J. Gaunt. "Carboxylate‐Assisted Oxidative Addition to Aminoalkyl Pd II Complexes: C(sp 3 )−H Arylation of Alkylamines by Distinct Pd II /Pd IV Pathway." Angewandte Chemie International Edition 58, no. 27 (May 24, 2019): 9054–59. http://dx.doi.org/10.1002/anie.201902838.

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44

Lee, Sang-gi, Kyu Ree Lee, Yu Lim Lee, and Kyu In Choi. "Cooperative Rh(II)/Pd(0) Dual Catalysis for the Synthesis of Carbo- and Heterocyclic Compounds." Synthesis 54, no. 03 (September 29, 2021): 555–64. http://dx.doi.org/10.1055/a-1657-2068.

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AbstractDual transition-metal catalysis has been introduced as a robust tool to synthesize a diverse range of organic compounds that cannot to be accessed by traditional single-metal catalysis. In this context, we have recently developed cooperative Rh(II)/Pd(0) dual catalytic systems that have been utilized for the preparation of heterocyclic compounds through the reaction between Rh(II)-carbenoid and π-allyl Pd(II)-complex intermediates in either synergistic or tandem relay catalysis. In synergistic Rh(II)/Pd(0) dual catalysis, the two reactive intermediates are generated simultaneously, which then undergo formal [6+3] dipolar cycloaddition to afford medium-sized heterocyclic compounds. On the other hand, tandem relay dual catalysis can be enabled through judicious choice of reaction parameters, which proceed through the insertion of Rh(II)-carbenoid into O–H or C–H bonds, followed by Pd(0)-catalyzed allylation to provide allylated benzo-fused cyclic compounds or chiral β-lactam derivatives.1 Introduction2 Synergistic Dual Rh(II)/Pd(0)-Catalyzed Dipolar [6+3]-Cycloaddition for the Synthesis of 1,4-Oxazonines3 Tandem Relay Dual Rh(II)/Pd(0) Catalysis for the Synthesis of 2-Aminoindanones4 Asymmetric Tandem Relay Dual Rh(II)/Pd(0) Catalysis for the Synthesis of α-Quaternary Chiral β-Lactams5 Tandem Relay Dual Rh(II)/Pd(0) Catalysis for the Synthesis of α-Quaternary Indolinones and Benzofuranones6 Conclusion

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45

Wang, Yu-Ting, Bin-Bin Gao, Fan Wang, Shi-Yuan Liu, Hong Yu, Wen-Hua Zhang, and Jian-Ping Lang. "Palladium(ii) and palladium(ii)–silver(i) complexes with N-heterocyclic carbene and zwitterionic thiolate mixed ligands: synthesis, structural characterization and catalytic properties." Dalton Transactions 46, no. 6 (2017): 1832–39. http://dx.doi.org/10.1039/c6dt04599e.

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46

Fleischer, Angela, Alexander Roller, Vladimir B. Arion, Bernhard K. Keppler, and Fabian Mohr. "Synthesis and structures of palladium(II) and platinum(II) complexes containing heterocyclic thiolate ligands formed by cycloaddition reactions of coordinated azides." Canadian Journal of Chemistry 87, no. 1 (January 1, 2009): 146–50. http://dx.doi.org/10.1139/v08-115.

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The phosphine-stabilized azido complexes [M(N3)2(PTA)2] (M = Pd, Pt; PTA = 1,3,5-triaza-7-phosphaadamantane) were prepared in high yields by a ligand exchange reaction from cis-[Pd(N3)2(tmeda)] and cis-[Pt(N3)2(cod)], respectively. The Pd and Pt complexes [M(N3)2(PTA)2] undergo cycloaddition reactions with various isothiocyanates to give complexes containing anionic, S-coordinated tetrazole-thiolate ligands of the type trans-[M(SCN4R)2(PTA)2] (M = Pd, Pt; R = Et, allyl, Me, Ph). The molecular structures of several of these derivatives were determined by X-ray crystallography.Key words: palladium, platinum, thiolate, heterocycle, azide, cycloaddition.

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47

Yalçın, Bahattin, Perizad A. Fatullayeva, Orhan Büyükgüngör, Başak Koşar, Sülin Taşcıoğlu, Akif I. Israfilov, Zaur D. Ibayev, Ajdar A. Medjidov, and Adnan Aydın. "Cu(II) and Pd(II) complexes of N-(2-hydroxybenzyl)aminopyridines." Polyhedron 26, no. 13 (August 2007): 3301–9. http://dx.doi.org/10.1016/j.poly.2007.03.015.

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48

Ali, Roushown, Jubaraj Chandra, and Tariqul Hasan. "Synthesis of Cationic Pd(II) Complexes with 5-Membered Ring Chelating Iminoylcarbene Ligand and Its Catalytic Activity on Norbornene Polymerization." Asian Journal of Chemistry 31, no. 3 (2019): 637–41. http://dx.doi.org/10.14233/ajchem.2019.21645.

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Iminoyl N-heterocyclic carbine ligand with cationic allyl Pd(II) complex (3) was successfully synthesized by transmetallation of corresponding Ag complex with one equivalent of [Pd(allyl)(COD)]+SbF6–. A slightly distorted square planer structure of the Pd(II) complex 3 was confirmed by single crystal X-ray diffraction analysis. The Pd(II) complex 3 is stable in air and found to show moderate activity in the polymerization of norbornene without any activator. The polynorbornene produced with Pd(II) complex 3 was obtained to be stable up to 440 °C. The 1H and 13C NMR spectra of the polymer indicated addition polymerization of norbornene and the presence of the vinylene group at the end of polymer chain.

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49

Lin, Jinqiang, Mo Xie, Xiaobao Zhang, Qin Gao, Xiaoyong Chang, Chao Zou, and Wei Lu. "Helically chiral Pd(ii) complexes containing intramolecular Pd⋯Pd metallophilicity as circularly polarized molecular phosphors." Chemical Communications 57, no. 13 (2021): 1627–30. http://dx.doi.org/10.1039/d0cc08188d.

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Pallas's shining helixes: single-helical and double-helical oligonuclear pincer-type palladium(ii) arylacetylide complexes exhibit circularly polarized phosphorescence with MMLCT parentages in fluid solutions.

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50

Mital, Mariusz, Kosma Szutkowski, Karolina Bossak-Ahmad, Piotr Skrobecki, Simon C. Drew, Jarosław Poznański, Igor Zhukov, Tomasz Frączyk, and Wojciech Bal. "The Palladium(II) Complex of Aβ4−16 as Suitable Model for Structural Studies of Biorelevant Copper(II) Complexes of N-Truncated Beta-Amyloids." International Journal of Molecular Sciences 21, no. 23 (December 2, 2020): 9200. http://dx.doi.org/10.3390/ijms21239200.

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The Aβ4−42 peptide is a major beta-amyloid species in the human brain, forming toxic aggregates related to Alzheimer’s Disease. It also strongly chelates Cu(II) at the N-terminal Phe-Arg-His ATCUN motif, as demonstrated in Aβ4−16 and Aβ4−9 model peptides. The resulting complex resists ROS generation and exchange processes and may help protect synapses from copper-related oxidative damage. Structural characterization of Cu(II)Aβ4−x complexes by NMR would help elucidate their biological function, but is precluded by Cu(II) paramagneticism. Instead we used an isostructural diamagnetic Pd(II)-Aβ4−16 complex as a model. To avoid a kinetic trapping of Pd(II) in an inappropriate transient structure, we designed an appropriate pH-dependent synthetic procedure for ATCUN Pd(II)Aβ4−16, controlled by CD, fluorescence and ESI-MS. Its assignments and structure at pH 6.5 were obtained by TOCSY, NOESY, ROESY, 1H-13C HSQC and 1H-15N HSQC NMR experiments, for natural abundance 13C and 15N isotopes, aided by corresponding experiments for Pd(II)-Phe-Arg-His. The square-planar Pd(II)-ATCUN coordination was confirmed, with the rest of the peptide mostly unstructured. The diffusion rates of Aβ4−16, Pd(II)-Aβ4−16 and their mixture determined using PGSE-NMR experiment suggested that the Pd(II) complex forms a supramolecular assembly with the apopeptide. These results confirm that Pd(II) substitution enables NMR studies of structural aspects of Cu(II)-Aβ complexes.

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