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Articoli di riviste sul tema "Hydroboranes synthesis"

Autore: Grafiati
Pubblicato: 21 dicembre 2024

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1

Price, Jeffrey S., Declan M. DeJordy, David J. H. Emslie e James F. Britten. "Reactions of [(dmpe)2MnH(C2H4)]: synthesis and characterization of manganese(i) borohydride and hydride complexes". Dalton Transactions 49, n. 29 (2020): 9983–94. http://dx.doi.org/10.1039/d0dt01726d.

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Abstract (sommario):
Reactions of trans-[(dmpe)2MnH(C2H4)] with hydroboranes and phosphines afforded manganese(i) borohydride and hydride complexes; reaction pathways, structures and bonding are discussed.
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Kostera, Sylwia, Maurizio Peruzzini e Luca Gonsalvi. "Recent Advances in Metal Catalyst Design for CO2 Hydroboration to C1 Derivatives". Catalysts 11, n. 1 (2 gennaio 2021): 58. http://dx.doi.org/10.3390/catal11010058.

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The use of CO2 as a C1 building block for chemical synthesis is receiving growing attention, due to the potential of this simple molecule as an abundant and cheap renewable feedstock. Among the possible reductants used in the literature to bring about CO2 reduction to C1 derivatives, hydroboranes have found various applications, in the presence of suitable homogenous catalysts. The current minireview article summarizes the main results obtained since 2016 in the synthetic design of main group, first and second row transition metals for use as catalysts for CO2 hydroboration.
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Moroz, Antoni, e Ray L. Sweany. "Photolysis of argon matrixes containing tribromoboron and dihydrogen: synthesis of hydroboranes via dibromoboron". Inorganic Chemistry 31, n. 25 (dicembre 1992): 5236–42. http://dx.doi.org/10.1021/ic00051a015.

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MOROZ, A., e R. L. SWEANY. "ChemInform Abstract: Photolysis of Argon Matrices Containing Tribromoboron and Dihydrogen: Synthesis of Hydroboranes via Dibromoboron." ChemInform 24, n. 15 (20 agosto 2010): no. http://dx.doi.org/10.1002/chin.199315025.

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5

Matsumi, Noriyoshi, Nobuaki Yoshioka e Keigo Aoi. "Synthesis of boric ester type ion-gels by dehydrocoupling of cellulose with hydroboranes in ionic liquid". Solid State Ionics 226 (ottobre 2012): 37–40. http://dx.doi.org/10.1016/j.ssi.2012.07.018.

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6

., Eishika, Himani . e Ridhi . "Review of Synthesis and Characterization of Cu (I) Complexes". International Journal of Research and Review 11, n. 1 (10 gennaio 2024): 195–209. http://dx.doi.org/10.52403/ijrr.20240121.

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Abstract (sommario):
d-block metals show great promise in inorganic catalytic research. Particularly, copper, d9 metal has contributed to catalytic properties of its complexes. A series of copper complexes was synthesized and structurally characterized. The copper (I) complexes of this series were investigated in regard to their reactivity towards dioxygen using stopped-flow techniques. For most complexes no “oxygen adduct” complexes as intermediates could be detected. In this article, some complexes of Cu (I) have been included and the ligands on which work had been done are mentioned below: 1,5-bis(benzimidazole-2-yl)-3-thiapentane Tridentate di-pyrazole -3,6-di-tert-butyl-carbazole (N, N, N-Pincer ligand) Methyl isocyanate N4Cu Tris(pyrazolyl) hydroborate ligand Scorpionate ligand Phenanthroline Tripodal amine ligands Triazole derivatives Keywords: BBES (1,5-bis(benzimidazole-2-yl)-3-thiapentane), MeIN (Methyl isocyanate), CuSCN (copper thiocyanate), PPh3(triphenyl phosphine), PCy3(tricyclohexyl phosphine), TptBuPh (tris[3-(p-tert-butylphenyl)], Tp (tris pyrazolyl hydroborate), Me4-p,3,3 (3,3-dimethylaminopropyl-(2-methylenpyridyl)-amine), Me2-pp3 (3-dimethylaminopropyl-bis(2-methylenpyridyl)-amine)
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7

Bahsis, Lahoucine, Hicham Ben El Ayouchia, Hafid Anane, Carmen Ramirez de Arellano, Abdeslem Bentama, El El Hadrami, Miguel Julve, Luis Domingo e Salah-Eddine Stiriba. "Clicking Azides and Alkynes with Poly(pyrazolyl)borate-Copper(I) Catalysts: An Experimental and Computational Study". Catalysts 9, n. 8 (14 agosto 2019): 687. http://dx.doi.org/10.3390/catal9080687.

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The synthesis of 1,4-disubstituted-1,2,3-triazoles under a copper(I)-catalyzed azide–alkyne cycloaddition (CuAAC) regime was accomplished in high yields and a regioselective manner by using two homoscorpionate poly(pyrazolyl)borate anions: tris(pyrazolyl)hydroborate (HB(pz)3−) and bis(pyrazolyl)hydroborate (H2B(pz)2−), which stabilized in situ the catalytically active copper (I) center. The [3+2] cycloaddition (32CA) reactions took place under strict click conditions, including room temperature and a mixture of environmentally benign solvents such as water/ethanol in a 1:1 (v/v) ratio. These click chemistry conditions were applied to form complex 1,2,3-triazoles-containing sugar moieties, which are potentially relevant from a biological point of view. Computational modeling carried out by DFT methodologies at the B3LYP/6-31G(d) level showed that the coordination of poly(pyrazolyl)borate-copper(I) to alkyne groups produced relevant changes in terms of generating a high polar copper(I)-acetylide intermediates. The analysis of the global and local reactivity indices explains correctly the role of poly(pyrazolyl)borate ligands in the stabilization and activation of the copper(I) catalyst in the studied 32CA reactions.
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8

Dunn, Simon C., Philip Mountford e Oleg V. Shishkin. "Imidotitanium Tris(pyrazolyl)hydroborates: Synthesis, Solution Dynamics, and Solid-State Structure". Inorganic Chemistry 35, n. 4 (gennaio 1996): 1006–12. http://dx.doi.org/10.1021/ic9510674.

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Bartholomew, Amymarie K., Louise M. Guard, Nilay Hazari e Eddie D. Luzik. "Synthesis of Mg Complexes Supported by Tris-(1-pyrazolyl)phosphine". Australian Journal of Chemistry 66, n. 11 (2013): 1455. http://dx.doi.org/10.1071/ch13354.

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The preparation and characterisation of two Mg coordination compounds supported by the tris(1-pyrazolyl)phosphine (P(pz)3) ligand, [{P(pz)3}Mg(MeCN)3](I)2 and [Mg{P(pz)3}2](I)2, is described. This is the first time this ligand has been coordinated to Mg or any other s-block metal and the complexes are the first examples of crystallographically characterised P(pz)3 complexes on any metal. The structures of the new Mg complexes are compared with related species with the more common tridentate facial ligands, tris(pyrazolyl)hydroborate (Tp), tris(pyrazolyl)methane (Tpm), and tris(pyrazolyl)methanide (Tpmd).
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10

Dionne, Michel, Shoukang Hao e Sandro Gambarotta. "Preparation and characterization of a new series of Cr(II) hydroborates". Canadian Journal of Chemistry 73, n. 7 (1 luglio 1995): 1126–34. http://dx.doi.org/10.1139/v95-139.

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The synthesis and characterization of a new series of mono-, di-, and trinuclear Cr(II) borohydride compounds is described. The reaction of CrCl2(TMEDA) with two equivalents of NaBH4 afforded the thermally unstable (TMEDA)Cr(BH4)2 (1), which was converted by treatment with pyridine into the octahedral monomeric (Py)4Cr(BH4)2 (2). The reaction proceeds via formation of an intermediate trinuclear complex {[(TMEDA)(Py)Cr(η2-BH4)]2[(Py)2Cr(η2-BH4)2]}(µ,η1-BH4)2 (3), which was isolated and characterized by X-ray crystallography. Reaction of 1 and 2 with both CO2 and RN=C=NR (R = Cy, iPr) afforded hydride insertion and formation of the corresponding diamagnetic lantern-type Cr(II) formate (HCO2)4Cr2Py2 (4) and formamidinate compounds [RNC(H)NR]2Cr2(µ-BH)4 (R = Cy (5a), iPr (5b)), respectively, with supershort Cr—Cr quadruple bonds. The structures of 1, 2, 3, and 5b were elucidated by X-ray analysis. Crystal data are as follows. 1: C6H24N2B2Cr, monoclinic, Cc, a = 8.517(2) Å, b = 15.921(5) Å, c = 9.624(2) Å, β = 115.59(1)°, Z = 4, R = 0.022, Rw = 0.029; 2: C28H44N4B2O2Cr, monoclinic, P21/n, a = 12.021(1) Å, b = 15.555(1) Å, c = 15.723(1) Å, β = 90.13(2)°, Z = 4, R = 0.074, Rw = 0.086; 3: C32H76N8B6Cr3, monoclinic, P21/n, a = 8.515(1) Å, b = 14.525(1) Å, c = 18.286(2) Å, β = 91.38(1)°, Z = 2, R = 0.051, Rw = 0.060; 5b: C21H49N6BCr2, monoclinic, C2/c, a = 17.000(1) Å, b = 9.033(1) Å, c = 19.160(1) Å, β = 105.579(9)°, Z = 4, R = 0.069, Rw = 0.078. Keywords: divalent chromium, borohydride, Cr—Cr quadruple bond.
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11

Kafka, Stanislav, Jan Kytner, Alexandra Šilhánková e Miloslav Ferles. "Hydroboration of 1-(5-hexenyl)piperidine and trans–1-(3-hexenyl)piperidine". Collection of Czechoslovak Chemical Communications 52, n. 8 (1987): 2035–46. http://dx.doi.org/10.1135/cccc19872035.

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1-(5-Hexenyl)piperidine (Ia) and trans-1-(3-hexenyl)piperidine (Ib) were hydroborated with tetrahydrofuran-borane, diborane in situ, 9-borabicyclo[3.3.1]nonane and triethylamine-borane. The hydroboration products were converted to 1-piperidinylhexanols IIa-IIe by hydrolysis with hydrochloric acid and subsequent oxidation with hydrogen peroxide in an alkaline medium. In addition to the alcohols IIa-IIe, the reaction also gave 1-hexylpiperidine (Ic). In the reactions with diborane in situ and triethylamine-borane, thermal isomerization of the hydroboration products was also studied. Hydroboration of Ia with triethylamine-borane afforded a mixture of spirocyclic amine-boranes IIIa-IIIc from which 6-(1-piperidinyl)-3-hexylboronic acid hydrochloride (IV) was obtained by hydrolysis with hydrochloric acid. Compounds IIIa-IIIc were slowly decomposed with ethanol to give esters of boronic acids Id-If. The synthesis of compounds Ia and Ib is described.
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12

LeCloux, Daniel D., e William B. Tolman. "Synthesis and transition metal complexation of an enantiomerically pure tris(pyrazolyl)hydroborate ligand". Journal of the American Chemical Society 115, n. 3 (febbraio 1993): 1153–54. http://dx.doi.org/10.1021/ja00056a052.

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13

Khan, Ezzat, e Bernd Wrackmeyer. "Synthesis, NMR characterization and reactivity of 1-silacyclohex-2-ene derivatives". Open Chemistry 10, n. 5 (1 ottobre 2012): 1633–39. http://dx.doi.org/10.2478/s11532-012-0079-1.

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AbstractThe chloro functionality of allyldichlorosilane (HSiCl2(C3H5)) and allyldichloromethylsilane (MeSiCl2(C3H5)) were replaced by alkynyl groups and new compounds, allyldialkynylsilane 1 and allyldialkynylmethylsilane 2, were obtained. These silanes, which served as starting materials for the onward reactions, were purified by fractional distillation. They were further subjected to hydroboration with 9-BBN (9-borabicyclo[3.3.1]nonane) and were converted into 1-silacyclohex-2-ene derivatives 5 and 6. The competition between C≡C and C=C in the reaction was studied. The hydroborating reagent 9-BBN was expected to prefer terminal C=C bonds and to leave C≡C bond untouched. This hypothesis of preferable hydroboration was experimentally proved, and hence, 1-silacyclohex-2-ene derivatives were obtained in reasonably pure form. The reaction of allyldialkynylsilane 2 with one equivalent of 9-BBN affords 1-silacyclohex-2-ene bearing Si-C≡C-function, ready to be hydroborated further with one equivalent of 9-BBN. The obtained compound bears two C-B bonds, which are attractive synthones for further transformations. This study aims to highlight the chemistry of C-B and Si-H functional groups. All new compounds obtained were colorless air and moisture sensitive oils, and they were studied by multinuclear magnetic resonance spectroscopy (1H, 13C, 11B, 29Si NMR) in solution.
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14

Xu, Gan, Zheng Wang, Rong Ling, Jie Zhou, Xu-Dong Chen e Richard H. Holm. "Ligand metathesis as rational strategy for the synthesis of cubane-type heteroleptic iron–sulfur clusters relevant to the FeMo cofactor". Proceedings of the National Academy of Sciences 115, n. 20 (13 aprile 2018): 5089–92. http://dx.doi.org/10.1073/pnas.1801025115.

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Molybdenum-dependent nitrogenases catalyze the transformation of dinitrogen into ammonia under ambient conditions. The active site (FeMo cofactor) is the structurally and electronically complex weak-field metal cluster [MoFe7S9C] built of Fe4S3 and MoFe3S3C portions connected by three sulfur bridges and containing an interstitial carbon atom centered in an Fe6 trigonal prism. Chemical synthesis of this cluster is a major challenge in biomimetic inorganic chemistry. One synthetic approach of core ligand metathesis has been developed based on the design and synthesis of unprecedented incomplete ([(Tp*)WFe2S3Q3]−) and complete ([(Tp*)WFe3S3Q4]2−) cubane-type clusters containing bridging halide (Q = halide). These clusters are achieved by template-assisted assembly in the presence of sodium benzophenone ketyl reductant; products are controlled by reaction stoichiometry. Incomplete cubane clusters are subject to a variety of metathesis reactions resulting in substitution of a μ2-bridging ligand with other bridges such as N3−, MeO−, and EtS−. Reactions of complete cubanes with Me3SiN3 and S8 undergo a redox metathesis process and lead to core ligand displacement and formation of [(Tp*)WFe3S3(μ3-Q)Cl3]− (Q = Me3SiN2−, S2−). This work affords entry to a wide variety of heteroleptic clusters derivable from incomplete and complete cubanes; examples are provided. Among these is the cluster [(Tp*)WFe3S3(μ3-NSiMe3)Cl3]−, one of the very few instances of a synthetic Fe–S cluster containing a light atom (C, N, O) in the core, which constitutes a close mimic of the [MoFe3S3C] fragment in FeMo cofactor. Superposition of them and comparison of metric information disclose a clear structural relationship [Tp* = tris(3,5-dimethyl-1-pyrazolyl)hydroborate(1−)].
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15

Eagle, Aston A., Robert W. Gable e Charles G. Young. "Synthesis and Structure of the Dinuclear Tungsten(V) Complex {HB(Me2C3N2H)3}WS(µ-S)2WS(S2PPh2)". Australian Journal of Chemistry 52, n. 9 (1999): 827. http://dx.doi.org/10.1071/ch99050.

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The complex LW V S(µ-S) 2 W V S(S 2 PPh 2 ) [L = tris(3,5-dimethylpyrazol-1-yl)hydroborate] results from the reaction of LW VI O 2 Cl with PPh 3 in refluxing pyridine, followed by the addition of NH 4 S 2 PPh 2 and reflux for a further 4 days. Crystals of LWS(µ-S) 2 WS(S 2 PPh 2 )·0.5CH 2 Cl 2 are monoclinic and belong to space group Cc with a 12.356(2), b 30.067(6), c 22.082(4) Å, β 96.08(2)° and Z 8. Refinement of 10507 data measured with Mo Kα radiation converged at R 0.0466 and R w 0.1421. The two independent molecules in the unit cell are dinuclear with a syn-[W 2 S 2 (µ-S) 2 ] 2+ core. One tungsten centre is further coordinated by a tridentate L ligand, making it six-coordinate with a distorted octahedral geometry while the other bears a bidentate dithiophosphinate ligand and is five-coordinate and square- pyramidal in geometry. The terminal thio–tungsten distances average 2.120 Å, and the parameters of the core [W–W av. 2.832 Å, W–(µ-S) av. 2.311 Å, S–W–S av. 100.2°, W–S–W av. 75.2°] are typical of syn-[W 2 S 2 (µ-S) 2 ] 2+ complexes.
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Young, CG, F. Janos, MA Bruck, PA Wexler e JH Enemark. "Nitridomolybdenum Complexes of Tris(3,5-dimethylpyrazol-1-yl)Hydroborate and the X-Ray Crystal-Structure of {HB(3,5-Me2C3N2H)3)MoN(N3)2". Australian Journal of Chemistry 43, n. 8 (1990): 1347. http://dx.doi.org/10.1071/ch9901347.

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The reaction of (NEt4)2[MoNCl5] and K{HB(Me2pz)3}[HB(Me2pz)3- = tris (3,5- dimethylpyrazol-1-yl) hydroborate anion] produces both purple, diamagnetic {HB(Me2pz)3}MoNCl2 (1) and yellow, paramagnetic Net4 [{HB(Me2pz)3}MoNCl2] (2) (e.s.r.: {g} 1.961, {a}(95Mo) 57×10-4 cm-1), which have been separately isolated under different conditions. In contrast, the reaction of [ MoN (N3)4]- with Na{HB(Me2pz)3} results in the exclusive formation of red {HB(Me2pz)3} MoN (N3)2 (3). Crystals of (3) are monoclinic and belong to space group P21/n with a 16.440(2), b 8.787(2), c 16.754(2) Ǻ,β 112.47(1)°, V 2236.4 Ǻ3, and Z 4. The structure was solved by Patterson and Fourier methods, followed by least-squares refinement, using 3208 reflections, to a conventional R value of 0.032 ( Rw 0.047). In the distorted octahedral complex the molybdenum(VI) atom is coordinated by a facial HB(Me2pz)3- ligand , a terminal nitrido ligand with a Mo-N bond distance of 1.646(4)Ǻ, and two azide ligands. All complexes have been characterized by elemental analysis, infrared, 1H n.m.r. or e.s.r. spectroscopy, and mass spectrometry. Improved syntheses for the starting materials (NEt4)2 [MoNCl5] and (NEt4)2 [MoNCl4] are also reported.
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Kim, Do Young, Yujian You e Gregory S. Girolami. "Synthesis and crystal structures of two (cyclopentadienyl)titanium(III) hydroborate complexes, [Cp∗TiCl(BH4)]2 and Cp2Ti(B3H8)". Journal of Organometallic Chemistry 693, n. 6 (marzo 2008): 981–86. http://dx.doi.org/10.1016/j.jorganchem.2007.12.017.

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Aldridge, Simon, Alexander J. Blake, Anthony J. Downs e Simon Parsons. "The methylzinc hydroborate derivative [(MeZn)2B3H7]2: synthesis, crystal structure and vibrational spectra of an unprecedented cluster compound". Journal of the Chemical Society, Chemical Communications, n. 13 (1995): 1363. http://dx.doi.org/10.1039/c39950001363.

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LeCloux, Daniel D., Christopher J. Tokar, Masahisa Osawa, Robert P. Houser, Michael C. Keyes e William B. Tolman. "Optically Active and C3-Symmetric Tris(pyrazolyl)hydroborate and Tris(pyrazolyl)phosphine Oxide Ligands: Synthesis and Structural Characterization". Organometallics 13, n. 7 (luglio 1994): 2855–66. http://dx.doi.org/10.1021/om00019a048.

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Li, Yue, Jia Wei, Jie Han e Xu-Dong Chen. "Synthesis and crystal structure of the cluster (Et4N)[(Tp*)MoFe3S3(μ3-NSiMe3)(N3)3]". Acta Crystallographica Section E Crystallographic Communications 80, n. 6 (31 maggio 2024): 691–94. http://dx.doi.org/10.1107/s2056989024004833.

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The title compound, tetraethylammonium triazidotri-μ3-sulfido-[μ3-(trimethylsilyl)azanediido][tris(3,5-dimethylpyrazol-1-yl)hydroborato]triiron(+2.33)molybdenum(IV), (C8H20N)[Fe3MoS3(C15H22BN6)(C3H9NSi)(N3)3] or (Et4N)[(Tp*)MoFe3S3(μ3-NSiMe3)(N3)3] [Tp* = tris(3,5-dimethylpyrazol-1-yl)hydroborate(1−)], crystallizes as needle-like black crystals in space group P\overline{1}. In this cluster, the Mo site is in a distorted octahedral coordination model, coordinating three N atoms on the Tp* ligand and three μ3-bridging S atoms in the core. The Fe sites are in a distorted tetrahedral coordination model, coordinating two μ3-bridging S atoms, one μ3-bridging N atom from Me3SiN2−, and another N atom on the terminal azide ligand. This type of heterometallic and heteroleptic single cubane cluster represents a typical example within the Mo–Fe–S cluster family, which may be a good reference for understanding the structure and function of the nitrogenase FeMo cofactor. The residual electron density of disordered solvent molecules in the void space could not be reasonably modeled, thus the SQUEEZE [Spek (2015). Acta Cryst. C71, 9–18] function was applied. The solvent contribution is not included in the reported molecular weight and density.
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Kraus, Florian, Monalisa Panda, Thomas Müller e Barbara Albert. "closo-Hydroborates from Liquid Ammonia: Synthesis and Crystal Structures of [Li(NH3)4]2[B12H12]·2NH3, Rb2[B12H12]·8NH3, Cs2[B12H12]·6NH3and Rb2[B10H10]·5NH3". Inorganic Chemistry 52, n. 8 (28 marzo 2013): 4692–99. http://dx.doi.org/10.1021/ic4002972.

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Carrier, Susan M., Christy E. Ruggiero, Robert P. Houser e William B. Tolman. "Synthesis, structural characterization, and electrochemical behavior of copper(I) complexes of sterically hindered tris(3-tert-butyl- and 3,5-diphenylpyrazolyl)hydroborate ligands". Inorganic Chemistry 32, n. 22 (ottobre 1993): 4889–99. http://dx.doi.org/10.1021/ic00074a039.

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Amoroso, Angelo J., Alexander M. Cargill Thompson, John C. Jeffery, Peter L. Jones, Jon A. McCleverty e Michael D. Ward. "Synthesis of the new tripodal ligand tris-[3-(2′-pyridyl)pyrazol-1-yl]hydroborate, and the crystal structure of its europium(III) complex". J. Chem. Soc., Chem. Commun., n. 24 (1994): 2751–52. http://dx.doi.org/10.1039/c39940002751.

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Liu, Fu-Chen, Jianping Liu, Edward A. Meyers e Sheldon G. Shore. "Cyclic Hydroborate Complexes of Metallocenes III. Syntheses and Structures of Zirconocene Boracyclohexane Derivatives Cp2Zr(X){(μ-H)2BC5H10} (X = H, CH3, H2BC5H10)†". Inorganic Chemistry 37, n. 13 (giugno 1998): 3293–300. http://dx.doi.org/10.1021/ic9803917.

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Kraus, Florian, Monalisa Panda, Thomas Mueller e Barbara Albert. "ChemInform Abstract: closo-Hydroborates from Liquid Ammonia: Synthesis and Crystal Structures of [Li(NH3)4]2[B12H12]·2NH3, Rb2[B12H12]·8NH3, Cs2[B12H12]·6NH2and Rb2[B10H10]·5NH3." ChemInform 44, n. 25 (3 giugno 2013): no. http://dx.doi.org/10.1002/chin.201325014.

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Jordan, Fu-Chen Liu e Sheldon G. Shore. "Cyclic Hydroborate Complexes of Metallocenes. 1. Organodiborate Ring Transformations Promoted by Zirconocene and Hafnocene Dichlorides. Syntheses and Structures of Zirconocene and Hafnocene Boracyclopentane Derivatives". Inorganic Chemistry 36, n. 24 (novembre 1997): 5597–602. http://dx.doi.org/10.1021/ic970758s.

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Chisholm, Malcolm H., Judith C. Gallucci e Gulsah Yaman. "Synthesis and coordination chemistry of TpC*MI complexes where M = Mg, Ca, Sr, Ba and Zn and TpC* = tris[3-(2-methoxy-1,1-dimethyl)pyrazolyl]hydroborate". Dalton Trans., n. 2 (2009): 368–74. http://dx.doi.org/10.1039/b812228h.

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Conry, Rebecca R., Guanzhen Ji e A. Alex Tipton. "Synthesis and Characterization of Copper(I) Complexes with a Fairly Bulky Tris(pyrazolyl)hydroborate Ligand. Probing the Flexibility of the Metal-Containing Pocket Formed by the Ligand". Inorganic Chemistry 38, n. 5 (marzo 1999): 906–13. http://dx.doi.org/10.1021/ic980851w.

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Liu, Jianping, Edward A. Meyers e Sheldon G. Shore. "Cyclic Hydroborate Complexes of Metallocenes II: Reactivity of (μ-H)2(BC5H10)2and Its Cyclic Derivative, [H2BC5H10]-; Synthesis of (η5-C5H5)2MCl(μ-H)2BC5H10(M = Zr, Hf)". Inorganic Chemistry 37, n. 3 (febbraio 1998): 496–502. http://dx.doi.org/10.1021/ic971275r.

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30

Liu, Fu-Chen, Bin Du, Jianping Liu, Edward A. Meyers e Sheldon G. Shore. "Cyclic Hydroborate Complexes of Metallocenes. V. Syntheses and Structures of Zirconocene Organoborate Derivatives: Cp2ZrH{(μ-H)2BC4H8}, Cp2Zr(CH2Ph){(μ-H)2BC4H8}, and Cp2Zr(CH2Ph){(μ-H)2BC5H10}". Inorganic Chemistry 38, n. 13 (giugno 1999): 3228–34. http://dx.doi.org/10.1021/ic990221+.

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31

Kühl, Olaf, Steffen Blaurock, Joachim Sieler e Evamarie Hey-Hawkins. "Metallatriphos complexes: synthesis and molecular structure of [TpZr(OCH2PPh2)3] (Tp=tris(pyrazolyl)hydroborate) and formation of the heterodinuclear complex [TpZr(μ-OCH2PPh2)3Mo(CO)3] with bridging phosphinoalkoxide ligands". Polyhedron 20, n. 17 (luglio 2001): 2171–77. http://dx.doi.org/10.1016/s0277-5387(01)00811-7.

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32

Ghosh, Prasenjit, e Gerard Parkin. "Terminal hydrochalcogenido and bridging selenido derivatives of magnesium supported by tris(3-p-tolylpyrazolyl)hydroborate ligation: the syntheses and structures of [Tp p-Tol]MgEH (E = S, Se) and {[Tp p-Tol]Mg}2Se". Chemical Communications, n. 10 (1996): 1239. http://dx.doi.org/10.1039/cc9960001239.

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33

Amoroso, Angelo J., John C. Jeffery, Peter L. Jones, Jon A. McCleverty e Michael D. Ward. "Complexes of a hexadentate podand ligand with actinides; The syntheses and crystal structures of [Th(TpPy)(NO3)3] · (dmf) · (Et2O)0.5 and trans-[UO2(TpPy)(OEt)] TpPy = tris[3-(2′-pyridyl)pyrazol-1-yl]hydroborate". Polyhedron 15, n. 12 (giugno 1996): 2023–27. http://dx.doi.org/10.1016/0277-5387(95)00451-3.

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34

Halcrow, Malcolm A., Eric J. L. McInnes, Frank E. Mabbs, Ian J. Scowen, Mary McPartlin, Harold R. Powell e John E. Davies. "Syntheses, structures and electrochemistry of [CuL1(LR)]BF4 [L1 = 3-{2,5-dimethoxyphenyl)-1-(2-pyridyl)pyrazole; LR = tris(3-arylpyrazolyl)hydroborate] and [CuL12][BF4]2. Effects of graphitic interactions on the stability of an aryl radical cation †". Journal of the Chemical Society, Dalton Transactions, n. 21 (1997): 4025–36. http://dx.doi.org/10.1039/a700317j.

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35

Dilworth, Jonathan R., Vernon C. Gibson, Nicola Davies, Carl Redshaw, Andrew P. White e David J. Williams. "Bis(isodiazene) and related complexes of molybdenum(VI). Syntheses and structures of [Mo(OTf )2(NNPh2)2(py)2], [MoCl(OTf )(NNPh2){NC5H3(CH2C(O)Ph2)2-2,6}], [{MoCl(NNPh2)2(μ-Cl)(NH2But)}2] and [MoTp′Cl(NNPh2)2] [OTf = O3SCF3, Tp′ = tris(3,5-dimethylpyrazolyl)hydroborate]". Journal of the Chemical Society, Dalton Transactions, n. 16 (1999): 2695–99. http://dx.doi.org/10.1039/a903372f.

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36

Zwart, Guilhem, Alexis Mifleur, Gabriel Durin, Emmanuel Nicolas e Thibault Cantat. "Hydrogenolysis of haloboranes: from synthesis of hydroboranes to formal hydroboration reactions". Angewandte Chemie, 6 agosto 2024. http://dx.doi.org/10.1002/ange.202411468.

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Abstract (sommario):
Hydroboranes are versatile reagents in synthetic chemistry, but their synthesis relies on energy‐intensive processes. Herein, we report a new method for the preparation of hydroboranes from hydrogen and the corresponding haloboranes. Triethylamine (NEt3) form with dialkylchloroboranes a Frustrated Lewis Pair (FLP) able to split H2 and afford the desired hydroborane with ammonium salts. Unreactive haloboranes were unlocked using a catalytic amount of Cy2BCl, enabling the synthesis of commonly used hydroboranes such as pinacolborane or catecholborane. The mechanisms of these reactions have been examined by DFT studies, highlighting the importance of the base selection. Finally, the system's robustness has been evaluated in one‐pot B‐Cl hydrogenolysis/hydroboration reactions of C=C unsaturated bonds.
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37

Zwart, Guilhem, Alexis Mifleur, Gabriel Durin, Emmanuel Nicolas e Thibault Cantat. "Hydrogenolysis of haloboranes: from synthesis of hydroboranes to formal hydroboration reactions". Angewandte Chemie International Edition, 6 agosto 2024. http://dx.doi.org/10.1002/anie.202411468.

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Abstract (sommario):
Hydroboranes are versatile reagents in synthetic chemistry, but their synthesis relies on energy‐intensive processes. Herein, we report a new method for the preparation of hydroboranes from hydrogen and the corresponding haloboranes. Triethylamine (NEt3) form with dialkylchloroboranes a Frustrated Lewis Pair (FLP) able to split H2 and afford the desired hydroborane with ammonium salts. Unreactive haloboranes were unlocked using a catalytic amount of Cy2BCl, enabling the synthesis of commonly used hydroboranes such as pinacolborane or catecholborane. The mechanisms of these reactions have been examined by DFT studies, highlighting the importance of the base selection. Finally, the system's robustness has been evaluated in one‐pot B‐Cl hydrogenolysis/hydroboration reactions of C=C unsaturated bonds.
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38

Park, Sehoon. "First‐Row Transition Metal‐Catalyzed Single Hydroelementation of N‐Heteroarenes". ChemCatChem, 29 novembre 2023. http://dx.doi.org/10.1002/cctc.202301422.

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Abstract (sommario):
Catalytic partial reduction of N‐heteroarenes with H2 or H[E] (E = Si, B‐based) has been a useful and general method for synthesis of a broad range of dihydropyridines (DHP) and dihydroquinolines (DHQ). In recent seven years, one of the most notable advances in this context is being able to utilize earth‐abundant and inexpensive first‐row transition metal‐based catalytic systems. These catalytic procedures are generally considered more environmentally benign and sustainable when compared to conventional catalytic systems relying on precious metals. This Review describes 20 molecular catalytic systems based on first‐row transition metals for selective single hydroelementation of pyridines and quinolines with H2 surrogate, hydrosilanes, and hydroboranes providing 1,2‐ or 1,4‐dihydropyridines and ‐dihydroquinolines. The observed reaction profiles such as scope and activity are briefly presented, while the proposed working modes over a series of elemental steps ‐ H−[E] bond cleavage, hydride (H‐) or hydrogen atom (H·) transfer, and product release, are discussed in detail on the basis of experimental and/or computational mechanistic observations and insights.
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39

Gao, Haopeng, Robert Müller, Elisabeth Irran, Hendrik F. T. Klare, Martin Kaupp e Martin Oestreich. "Competition for Hydride Between Silicon and Boron: Synthesis and Characterization of a Hydroborane‐Stabilized Silylium Ion". Chemistry – A European Journal 28, n. 12 (10 gennaio 2022). http://dx.doi.org/10.1002/chem.202104464.

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40

Qiu, Shu-Juan, Jia Wei, Hong-Ying Zhang, Yu Luo, Xing-Yao Zhou, Xiao-Cheng Cao, Ye-Shuai Ling, Jie Han e Xu-Dong Chen. "Nitride‐Bridged Mo‐Fe‐S Double‐Cubanes: Syntheses, Redox Behaviors and Comparison with their W Analogs". European Journal of Inorganic Chemistry, 2 luglio 2024. http://dx.doi.org/10.1002/ejic.202400245.

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Abstract (sommario):
The FeMo cofactor (FeMoco) of the Mo‐dependent nitrogenase was identified as a Mo‐Fe‐S cluster incorporating a 2p atom in the core. The edge‐bridged double‐cubane (EBDC, [M2Fe6(µ3‐S)6(µ4‐S)2]z (M = Mo/V; z denotes charge)) clusters were demonstrated to undergo rearrangement reactions to generate the apex‐fused double‐cubane clusters ([M2Fe6(μ2‐S)2(μ3‐S)6(μ6‐S)]z) as mimics of the PN‐clusters. The introduction of 2p atoms into the core of EBDC clusters will furnish the possibility of mimicking the FeMoco structure through rearrangement. In this work, an EBDC Mo‐Fe‐S cluster with core nitrides, namely [(Tp*)2Mo2Fe6(μ4‐N)2S6Cl4]2− (Tp* = tris(3,5‐dimethyl‐1‐pyrazolyl)hydroborate), has been synthesized. Subsequent terminal ligand substitution has produced a series of EBDC clusters with isostructural cores. Further studies of the series of nitride‐containing EBDC clusters are focused on their structures and redox properties, as well as comparisons with their W analogs. The results indicate that the core structures of these clusters are affected by distinct hetero‐metal centers and different terminal ligands to a limited extent, but the redox behavior and redox potentials of these clusters differ significantly. This work provides us with a viable method for regulating the properties of the nitride‐containing EBDC clusters, which may be enlightening for further studies of the rearrangement reactions towards mimicking the FeMoco structure.
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41

FRYZUK, M. D., S. J. RETTIG, A. WESTERHAUS e H. D. WILLIAMS. "ChemInform Abstract: Synthesis, Stability, and Fluxional Behavior of Binuclear Mixed-Hydride -Tetra-hydroborate Complexes of Hafnium(IV): X-Ray Crystal Structure of [[(Me2PCH2SiMe2)2N]Hf(BH4)2](μ-H)3[Hf(BH4)[N(SiMe2CH2PMe2)2]]". Chemischer Informationsdienst 17, n. 14 (8 aprile 1986). http://dx.doi.org/10.1002/chin.198614277.

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