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Articoli di riviste sul tema "Diazonia"

Autore: Grafiati
Pubblicato: 14 settembre 2024

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1

Estienne, J., O. Cerclier e J. J. Rosenberg. "Powder diffraction data of two tricydic diazonia diiodide salts used in silver iodide solid electrolytes". Powder Diffraction 8, n. 3 (settembre 1993): 175–79. http://dx.doi.org/10.1017/s0885715600018145.

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Abstract (sommario):
Indexed X-ray powder diffraction data are reported for two organic salts with carbon rings having two quaternary nitrogens: diazonia-6,9 dispiro [5.2.5.2] hexadecane and diazonia-6,9 dispiro [5.2.5.3] heptadecane diiodides. For these compounds, which give solid electrolytes when associated with AgI, powder diffraction diagrams calculated by the Rietveld method from single crystal structure determinations are presented and are compared to the experimental diffraction data.
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2

Yousefi, Mohammad, Vahid Amani e Hamid Reza Khavasi. "1,10-Diazonia-18-crown-6 dichloride". Acta Crystallographica Section E Structure Reports Online 63, n. 9 (10 agosto 2007): o3782. http://dx.doi.org/10.1107/s160053680703807x.

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3

Kliegel, Wolfgang, Ulf Riebe, Steven J. Rettig e James Trotter. "Structural studies of organoboron compounds XLVIII. 1,4-Diphenyl-3,3:6,6-bis(tetramethylene)-2,5,7-trioxa-3,6-diazonia-1,4-diboratabicyclo[2.2.1]heptane". Canadian Journal of Chemistry 69, n. 8 (1 agosto 1991): 1222–26. http://dx.doi.org/10.1139/v91-182.

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The reaction of N-hydroxypyrrolidine with either oxybis(diphenylborane) or phenylboronic acid gives 1,4-diphenyl-3,3:6,6-bis(tetramethylene)-2,5,7-trioxa-3,6-diazonia-1,4-diboratabicyclo[2.2.1]heptane in moderate yield. Crystals of the product are orthorhombic, a = 10.984(2), b = 14.619(2), c = 12.311(2) Å, Z = 4, space group Pccn. The structure was solved by direct methods and was refined by full-matrix least-squares procedures to R = 0.039 and Rw = 0.043 for 908 reflections with I ≥ 3σ(I). This is the first heterocyclic [2.2.1]heptane system containing a six-membered BONBON ring and a B—O—B bridge to be structurally characterized. The molecule has exact C2 symmetry with the twofold axis passing through the bridging oxygen atom. Bond lengths involving the tetrahedrally coordinated boron atom are B—O(B) = 1.423(3), B—O(N) = 1.497(3), B—N = 1.703(3), and B—C(phenyl) = 1.577(4) Å. Key words: 2,5,7-trioxa-3,6-diazonia-1,4-diboratabicyclo[2.2.1]heptane ring system, crystal structure, organoboron compound.
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4

Gharbi, A., e A. Jouini. "4,9-Diazonia-1,12-dodecanediammonium Dilithium cyclo-Hexaphosphate Tetrahydrate". Acta Crystallographica Section C Crystal Structure Communications 52, n. 6 (15 giugno 1996): 1342–44. http://dx.doi.org/10.1107/s0108270196000558.

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5

Söhnel, Tilo, Kathrin A. Wichmann, Thomas Doert e Garth J. S. Cooper. "3,12-Diaza-6,9-diazonia-2,13-dioxotetradecane bis(perchlorate)". Acta Crystallographica Section E Structure Reports Online 68, n. 2 (11 gennaio 2012): o333—o334. http://dx.doi.org/10.1107/s1600536811055516.

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6

Yousefi, Mohammad, Shabahang Teimouri, Vahid Amani e Hamid Reza Khavasi. "1,10-Diazonia-18-crown-6 hexachloridoplatinate(IV) dihydrate". Acta Crystallographica Section E Structure Reports Online 63, n. 10 (1 settembre 2007): m2460—m2461. http://dx.doi.org/10.1107/s1600536807042341.

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7

Miller, Norman E., e Don L. Reznicek. "Chemistry of 1,1,4,4-tetramethyl-1,4-diazonia-2,5-diboratacyclohexane". Journal of Organometallic Chemistry 349, n. 1-2 (luglio 1988): 11–22. http://dx.doi.org/10.1016/0022-328x(88)80432-7.

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8

Miller, Norman E. "Stereochemistry of a 2,5-disubstituted 1,4-diazonia-2,5-diboratacyclohexane". Inorganic Chemistry 27, n. 12 (giugno 1988): 2196–200. http://dx.doi.org/10.1021/ic00285a038.

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9

Srinivasan, Bikshandarkoil R., Christian Näther, Sunder N. Dhuri e Wolfgang Bensch. "Cation–anion interactions in bis(±)trans-2-aminocyclohexylammonium tetrathiotungstate, 1,7-diazonia-4-aza-heptane tetrathiotungstate and 1,5-diazonia-9-aza-nonane tetrathiotungstate". Polyhedron 25, n. 17 (dicembre 2006): 3269–77. http://dx.doi.org/10.1016/j.poly.2006.05.039.

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10

Estienne, J. "Structure de l'octaiodotétraargentate de bis(diazonia-6,9 dispiro[5.2.5.3]heptadécane)". Acta Crystallographica Section C Crystal Structure Communications 42, n. 11 (15 novembre 1986): 1512–16. http://dx.doi.org/10.1107/s0108270186091655.

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11

Chekhlov, A. N. "Second crystal modification of 1,10-diazonia-18-crown-6 dichloride". Journal of Structural Chemistry 48, n. 6 (novembre 2007): 1160–63. http://dx.doi.org/10.1007/s10947-007-0187-5.

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12

Granzhan, Anton, Heiko Ihmels e Katharina Jäger. "Diazonia- and tetraazoniapolycyclic cations as motif for quadruplex-DNA ligands". Chemical Communications, n. 10 (2009): 1249. http://dx.doi.org/10.1039/b812891j.

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13

Chekhlov, A. N., N. G. Zabirov e R. A. Cherkasov. "Crystal structure of 1H+,10H+-1,10-diazonia-18-crown-6 diethyldithiophosphate". Bulletin of the Academy of Sciences of the USSR Division of Chemical Science 40, n. 1 (gennaio 1991): 172–74. http://dx.doi.org/10.1007/bf00959654.

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14

Magera, Mark J., e Norman E. Miller. "Chemistry of 2-hydroxy-2-(dimethylaminomethyl)-1,1,4,4-tetramethyl-1,4-diazonia-2,5-diboratacyclohexane". Journal of Organometallic Chemistry 339, n. 3 (febbraio 1988): 231–39. http://dx.doi.org/10.1016/s0022-328x(00)99384-7.

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15

Chekhlov, A. N. "Synthesis and Crystal Structure of 1,10-Diazonia-18-crown-6 Diiodide Dihydrate". Russian Journal of General Chemistry 75, n. 10 (ottobre 2005): 1618–21. http://dx.doi.org/10.1007/s11176-005-0476-7.

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16

Chekhlov, A. N. "Crystal structure of 1h+, 10h+-1, 10-diazonia-18-crown-6 thiocyanate". Bulletin of the Academy of Sciences of the USSR Division of Chemical Science 40, n. 2 (febbraio 1991): 432–34. http://dx.doi.org/10.1007/bf00965445.

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17

Chen, Zhu-Jun, e Ke-Wei Lei. "4,4′,6,6′-Tetrabromo-2,2′-(2,8-diazonia-5-azanona-1,8-diene-1,9-diyl)diphenolate". Acta Crystallographica Section E Structure Reports Online 64, n. 12 (26 novembre 2008): o2450. http://dx.doi.org/10.1107/s1600536808037732.

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18

Nakai, Yoshito, Tadashi Mori, Kiyoshi Sato e Yoshihisa Inoue. "Theoretical and Experimental Studies of Circular Dichroism of Mono- and Diazonia[6]helicenes". Journal of Physical Chemistry A 117, n. 24 (7 giugno 2013): 5082–92. http://dx.doi.org/10.1021/jp403426w.

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19

Estienne, J., G. Davidovics, M. Pierrot, A. Baldy, J. Rosenberg e G. Robert. "Structure et analyse par mécanique moléculaire du diiodure de diazonia-6,9 dispirol[5.2.5.3]heptadécane". Acta Crystallographica Section C Crystal Structure Communications 42, n. 4 (15 aprile 1986): 496–99. http://dx.doi.org/10.1107/s0108270186095665.

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20

Estienne, Jacques, e Joseph J. Rosenberg. "Conductivit� �lectrique totale du systeme iodure d'argent-diiodure de diazonia-6,9-dispiro[5.2.5.3]heptadecane". Journal of Applied Electrochemistry 17, n. 3 (maggio 1987): 600–606. http://dx.doi.org/10.1007/bf01084135.

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21

Fonari, Marina S., Yurii A. Simonov, Mark Botoshansky, Eduard V. Ganin e Arkadii A. Yavolovskii. "The hydrogen-bonded adduct 7,16-diazonia-18-crown-6–4-aminobenzenesulfonate–water (1/2/2)". Acta Crystallographica Section C Crystal Structure Communications 59, n. 2 (31 gennaio 2003): o88—o90. http://dx.doi.org/10.1107/s010827010300129x.

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22

Zhang, Y. H., S. Chantrapromma, S. Shanmuga Sundara Raj, H. K. Fun, Y. P. Tian, F. X. Xie e Z. Y. Chen. "11-Carboxylatomethyl-15-carboxymethyl-11,15-diazonia-3,23-dioxa-28-thiatetracyclo[23.2.1.04,9.017,22]octacosa-4,6,8,17,19,21,25,27-octaene bromide". Acta Crystallographica Section C Crystal Structure Communications 55, n. 11 (15 novembre 1999): 1839–41. http://dx.doi.org/10.1107/s0108270199009117.

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23

Deng, Gui-Ru, Yan-Hong Zhang e Guang-Ming Yang. "(7,12-Diphenyl-5,6:13,14-dibenzo-8,11-diazonia-1,4-diazacyclopentadeca-7,12-diene-2,3-dione)nickel(II)". Acta Crystallographica Section E Structure Reports Online 63, n. 1 (6 dicembre 2006): m29—m30. http://dx.doi.org/10.1107/s1600536806051038.

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24

Kliegel, Wolfgang, Dierk Nanninga, Ulf Riebe, Steven J. Rettig e James Trotter. "Structural studies of organoboron compounds LXI. Synthesis of (alkylideniminoxy)- diarylboranes and crystal and molecular structure of dimeric (ethylideniminoxy)-bis(4-methoxyphenyl)borane [3,3,6,6-tetrakis(4-methoxyphenyl)-2,5-diethylidene-1,4-dioxa-2,5-diazonia-3,6-diboratacyclohexane]". Canadian Journal of Chemistry 72, n. 7 (1 luglio 1994): 1735–40. http://dx.doi.org/10.1139/v94-219.

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Abstract (sommario):
Oxime diarylborinates, 4, were obtained from several aliphatic and aromatic aldoximes as well as from cyclic ketoximes by acylation with a diarylborinic acid or anhydride (R2B-X, R = aryl, X = OH or OBR2). Compounds 4 could also be synthesized by condensation of an (aminoxy)-diarylborane, which supposedly has a cyclodimeric BONBON structure, with an aldehyde or with a ketone. Crystals of 3,3,6,6-tetrakis(4-methoxyphenyl)-2,5-diethylidene-1,4-dioxa-2,5-diazonia-3,6-diboratacyclohexane, 4b, are monoclinic, a = 7.9182(9), b = 19.7582(9), c = 9.6779(8) Å, β = 91.598(8)°, Z = 2, space group P21/n. The structure was solved by direct methods and refined by full-matrix least-squares procedures to R = 0.033 and Rw = 0.034 for 2344 reflections with I ≥ 3σ(F2). A dimeric structure featuring a central six-membered BONBON ring has been established for the oxime diarylborinate 4b. This represents the first structurally characterized example of a monocyclic BONBON ring.
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25

Amt, Henning, Wolfgang Kliegel, Steven J. Rettig e James Trotter. "Structural studies of organoboron compounds. XXX. 1,9-Dimethyl-3,5,7-triphenyl-2,4,6,8-tetraoxa-1,9-diazonia-5-bora-3,7- diboratatricyclo[5.4.0.03,9]undecane". Canadian Journal of Chemistry 66, n. 5 (1 maggio 1988): 1117–22. http://dx.doi.org/10.1139/v88-183.

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Abstract (sommario):
Details of the preparation and physical properties of the title compound are given. Crystals of 1,9-dimethyl-3,5,7- triphenyl-2,4,6,8-tetraoxa-1,9-diazonia-5-bora-3,7-diboratatricyclo[5.4.0.03,9]undecane are orthorhombic, a = 9.4026(3), b = 9.4663(2), c = 24.7462(9) Å, Z = 4, space group P212121. The structure was solved by direct methods and was refined by full-matrix least-squares procedures to R = 0.036 and Rw = 0.038 for 1536 reflections with I ≥ 3σ(I). The three six-membered and two seven-membered rings comprising the tricyclo[5.4.0.03,9]undecane ring system all have boat or boat-like conformations. Important bond lengths (corrected for libration) are: B(sp3)—N = 1.649(6) and 1.668(6), B(sp3)—O(N) = 1.492(5) and 1.497(6), B(sp3)—O[B(sp2)] = 1.444(6) and 1.438(5), B(sp3)—C = 1.600(6) and 1.594(7), B(sp2)—O = 1.357(6) and 1.370(6), B(sp2)—C = 1.574(6) Å.
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26

Kliegel, Wolfgang, Mahmood Tajerbashi, Steven J. Rettig e James Trotter. "Structural studies of organoboron compounds. XXXV. 4,8-Diethyl-2,2,6,6-tetraphenyl-1,3,5,7-tetraoxa-4,8-diazonia- 2,6-diborata-1,2,3,5,6,7-hexahydronaphthalene". Canadian Journal of Chemistry 67, n. 10 (1 ottobre 1989): 1644–49. http://dx.doi.org/10.1139/v89-252.

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The reaction of Ν,Ν′-diethyloxalohydroxamic acid with oxybis(diphenylborane) yields the title compound. Crystals of 4,8-diethyl-2,2,6,6-tetraphenyl-1,3,5,7-tetraoxa-4,8-diazonia-2,6-diborata-1,2,3,5,6,7-hexahydronaphthalene are monoclinic, a = 14.3405(9), b = 14.3053(5), c = 14.9301(8) Å, β = 116.136(4)°, Z = 4, space groupP21/n. The structure was solved by direct methods and was refined by full-matrix least-squares procedures to R = 0.038 and Rw = 0.038 for 3501 reflections with I ≥ 3σ(I). The molecule has a novel bis-six-membered binuclear chelate structure, the Ph2B moieties each being coordinated by (N)O and (C=)O oxygen atoms from different hydroxamate groups. The mean libration-corrected bond distances (C=)O—B, 1.587 Å, (N)O—B, 1.511 Å, and B—C, 1.602 Å, represent the weakest overall binding strength of an O,O-chelating ligand with respect to the Ph2B moiety yet observed for a six-membered O—B—O chelate. Keywords: crystal structure, boron compound, organoboron compound.
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27

Li, Lin-Hai, Wen-Yong Zhao, Si-Yu Deng, Long-Fei Ma e Li-Zhuang Chen. "A molecular-based phase trasition compound based on ligand 1-ethyl-1,4-diazonia-bicyclo [2.2.2] octane". Inorganic Chemistry Communications 92 (giugno 2018): 125–30. http://dx.doi.org/10.1016/j.inoche.2018.04.022.

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28

Kubo, Kanji, Hajime Takahashi e Haruko Takechi. "Crystal Structure and Fluorescence Behavior of N,N'-Bis (1-naphthylmethyl)-diazonia-18-crown-6 Diisothiocyanate". Journal of Oleo Science 59, n. 11 (2010): 615–19. http://dx.doi.org/10.5650/jos.59.615.

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29

Zupan, Marko, Primož Škulj e Stojan Stavber. "Effect of cycloalkene structure on fluorination with 1-chloromethyl-4-fluoro-1,4-diazonia[2.2.2]octane bis(tetrafluoroborate) (F-TEDA)". Tetrahedron 57, n. 50 (dicembre 2001): 10027–31. http://dx.doi.org/10.1016/s0040-4020(01)01031-6.

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Kliegel, Wolfgang, Ulf Riebe, Steven J. Rettig e James Trotter. "Structural studies of organoboron compounds. XLVIII. 1,4-Diphenyl-3,3:6,6-bis(tetramethylene)-2,5,7-trioxa-3,6-diazonia-1,4-diboratabicyclo[2.2.1]heptane". Canadian Journal of Chemistry 69, n. 12 (1 dicembre 1991): 2152. http://dx.doi.org/10.1139/v91-314.

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31

Miller, Norman E. "Borane isonitriles and carboxylates. Synthesis and characterization of the 2-carboxylic acid derivative of 1,1,4,4-tetramethyl-1,4-diazonia-2,5-diboratacyclohexane". Inorganic Chemistry 30, n. 9 (maggio 1991): 2228–31. http://dx.doi.org/10.1021/ic00009a050.

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Sato, Kiyoshi, Yuta Seki, Shotaro Suga, Yusuke Ikeda e Motowo Yamaguchi. "Reinvestigation of the photoreaction of 1,4-bis(2,4,6-triphenylpyridinio)benzene: Synthesis of a diazonia derivative of hexabenzoperylene by multiple photocyclization". Journal of Photochemistry and Photobiology A: Chemistry 331 (dicembre 2016): 8–16. http://dx.doi.org/10.1016/j.jphotochem.2016.06.022.

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33

Henschel, Dagmar, Karna Wijaya, Oliver Moers, Armand Blaschette e Peter G. Jones. "Polysulfonylamine, XCVII [1] Di(organosulfonyl)amine und ihre konjugierten Anionen als simultane Baugruppen in zwei supramolekularen Strukturen / Polysulfonylamines, XCVII [1] Di(organosulfonyl)amines and their Conjugate Anions as Simultaneous Building Blocks in Two Supramolecular Structures". Zeitschrift für Naturforschung B 52, n. 10 (1 ottobre 1997): 1229–36. http://dx.doi.org/10.1515/znb-1997-1014.

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Abstract (sommario):
The complex compounds 4HN (SO2Me)2 · (diaza-18-crown-6) (1) and Na[N(SO2Ph)2] · 2HN(SO2Ph)2 · 2 (12-crown-4) · 2 MeOH (2) were obtained from their components and characterized by low-temperature X-ray diffraction. Structure 1 (monoclinic, space group P21/n) displays centrosymmetric formula units consisting of a biangular diazonia-18-crown-6 dication, two (MeSO2)2N− anions situated above and below the macrocycle and linked to the NH2+ groups via an N - H ··· O and N -H ··· N bond system, and finally two HN(SO2Me)2 molecules, each forming an N -H ··· O bond to one of the anions. The molecule-anion entity represents an iso form of the [(RSO2)2N -H ··· N (SO2R)2]− homoconjugates previously described. The crystal packing of 1 is stabilized by an extensive and highly organized [H2C -H ··· O(S)] hydrogen bond network. Structure 2 (monoclinic, space group P21/n) exhibits inconspicuous [Na(12-crown-4)2]+ cations and, as a striking feature, supramolecular anions assembled from a central (PhSO2)2N− ion, two MeOH molecules flanking the amide anion, and two HN (SO2Ph)2 molecules bonded to the MeOH moieties. The assembly is held together by two N -H ··· O(H )(Me) bonds, one MeO -H ··· N− bond and one MeO -H ··· O(anion) interaction. For both structures, conformational peculiarities of the N(SO2C)2 groups are discussed.
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34

Chen, Li-Zhuang, Deng-Deng Huang, Qi-Jian Pan e Jia-Zhen Ge. "Novel pure Pnma–P212121 ferroelastic phase transition of 1,4-diisopropyl-1,4-diazonia-bicyclo[2.2.2]octane tetra-chlorobromo-M(ii) (M = Mn and Co)". RSC Advances 5, n. 18 (2015): 13488–94. http://dx.doi.org/10.1039/c4ra12690d.

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Abstract (sommario):
Two novel Pnma–P212121 ferroelastic phase transition Dip-DABCO tetra-chlorobromo-M(ii) (M = Mn and Co) were synthesized and their structures have been determined by means of single-crystal X-ray diffraction.
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35

MILLER, N. E. "ChemInform Abstract: Borane Isonitriles and Carboxylates. Synthesis and Characterization of the 2-Carboxylic Acid Derivative of 1,1,4,4-Tetramethyl-1,4-diazonia-2, 5-diboratacyclohexane." ChemInform 22, n. 32 (22 agosto 2010): no. http://dx.doi.org/10.1002/chin.199132192.

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KLIEGEL, W., U. RIEBE, S. J. RETTIG e J. TROTTER. "ChemInform Abstract: Structural Studies of Organo-Boron Compounds. Part 48. 1,4-Diphenyl-3, 3:6,6-bis(tetramethylene)-2,5,7-trioxa-3,6-diazonia-1,4- diboratabicyclo(2.2.1)heptane." ChemInform 22, n. 49 (22 agosto 2010): no. http://dx.doi.org/10.1002/chin.199149217.

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37

Rosenberg, J. J., e J. Estienne. "Conductivit� �l�ctrique totale du syst�me iodure d'argent-diiodure de diazonia-6,9-dispiro [5.2.5.2] hexadecane. Application a l'�tude d'un g�n�rateur tout solide". Journal of Applied Electrochemistry 20, n. 4 (luglio 1990): 662–71. http://dx.doi.org/10.1007/bf01008880.

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38

Navarro-Ranninger, M. Carmen, Sagrario Martinez-Carrera e Severino Garcia-Blanco. "Crystal and molecular structure of the tetrachloropalladate of the dication meso-3,7-diazonia tricyclo[4.2.2.22,5]dodeca-3,7,9,11-tetraen-4,8 diamine obtained by coupling reaction of 2-aminopyridines". Polyhedron 4, n. 8 (gennaio 1985): 1379–81. http://dx.doi.org/10.1016/s0277-5387(00)86967-3.

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Pravst, Igor, e Stojan Stavber. "Fluorination of 4-alkyl-substituted phenols and aromatic ethers with fluoroxy and N-F reagents: Cesium fluoroxysulfate and N-fluoro-1,4-diazonia-bicyclo[2.2.2]octane dication salts case". Journal of Fluorine Chemistry 156 (dicembre 2013): 276–82. http://dx.doi.org/10.1016/j.jfluchem.2013.07.002.

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40

Kliegel, Wolfgang, Gottfried Lubkowitz, Steven J. Rettig e James Trotter. "Structural studies of organoboron compounds. LVI. 1-Benzyl-7-methyl-3,5-diphenyl-2,4,6-trioxa-1-azonia-3-bora-5-boratabicyclo[3.3.0]octane and 1,4,6,9-tetramethyl-2,7-diphenyl-3,8,11,12-tetraoxa-1,6-diazonia-2,7-diboratatricyclo[5.3.1.12,6]dodecane". Canadian Journal of Chemistry 70, n. 11 (1 novembre 1992): 2809–17. http://dx.doi.org/10.1139/v92-357.

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The preparation of the N-(2-hydroxypropyl)-N-alkylhydroxylamines, 6a (R = CH3) and 6b (R = CH2Ph), and their reactions with phenylboronic acid are described. Regardless of the molar ratios of reactants employed, the reaction with 6b leads to the 1:2 condensate 1-benzyl-7-methyl-3,5-diphenyl-2,4,6-trioxa-1-azonia-3-bora-5-boratabicyclo[3.3.0]octane, 7, while that with 6a gives rise to the 1:1 condensate 1,4,6,9-tetramethyl-2,7-diphenyl-3,8,11,12-tetraoxa-1,6-diazonia-2,7-diboratatricyclo[5.3.1. 12,6]dodecane, 11 (the cyclic BONBON dimer of 4,6-dimethyl-2-phenyl-1,3-dioxa-4-aza-2-boracyclohexane, 9). Compounds 7 and 11 both crystallize in the triclinic space group [Formula: see text]: for 7; a = 13.126(1), b = 15.337(1), c = 10.9469(5) Å, α = 91.727(5), β = 104.647(5), γ = 72.922(7)°, Z = 4; and for 11; a = 9.0807(4), b = 9.1653(3), c = 6.4876(2) Å, α = 97.708(3), β = 108.830(3), γ = 89.188(4)°, Z = 1. The structures were solved by direct methods and were refined by full-matrix least-squares procedures to R = 0.038 and 0.032 for 5879 and 1827 reflections with I ≥ 3σ(F2), respectively. Compound 7 has the expected bicyclic pyroboronate structure, but represents the first reported N-substituted example of this type of compound. Bond lengths involving boron in 7 are (C) O—B(sp3) = 1.428(2) and 1.420(2), (B)O—B(sp3) = 1.472(2) and 1.468(2), N—B(sp3) = 1.737(2) and 1.762(2), C(phenyl)—B(sp3) = 1.588(2) and 1.584(2), (N)O—B(sp2) = 1.402(2) and 1.404(2), (B)O—B(sp2) = 1.331(2) and 1.329(2), C(phenyl)—B(sp2) = 1.555(3) and 1.553(2) Å. The X-ray analysis establishes a centrosymmetric, twofold N → B coordinated, dimeric structure in the solid state for 11 in which each B—O—N segment of a central six-membered BONBON ring is bridged by an O—C—C moiety. Compound 11 represents the first fully characterized example of a new type of "BONBON" compound. Bond distances involving the boron atom are (N)O—B = 1.465(1), (C)O—B = 1.428(1), N—B = 1.695(2), and C(phenyl)—B = 1.607(2) Å. Spectroscopic evidence indicates that in solution and in the gas phase this material exists predominantly as the monomer 9.
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41

Subik, Paweł, Agata Białońska e Stanisław Wołowiec. "Tricyclic ligands on cyclam core and X-ray crystallographic structure of hexachloro-(1,11:4,8-bis(pyridine-2,6-diyl-bis(2-(N-(2-formidoylethylene)carbamoyl)ethylene))-1,8-diazonia-4,11-diazacyclotetradecane) – dimanganese(II) dimethanol dihydrate solvate". Polyhedron 30, n. 5 (marzo 2011): 873–79. http://dx.doi.org/10.1016/j.poly.2010.12.017.

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42

Moreno, Tatiane R., e Rosana M. Rocha. "Phylogeny of the Aplousobranchia (Tunicata: Ascidiacea)". Revista Brasileira de Zoologia 25, n. 2 (giugno 2008): 269–98. http://dx.doi.org/10.1590/s0101-81752008000200016.

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Abstract (sommario):
The phylogenetic relationships of genera and families of Aplousobranchia Lahille (Tunicata, Ascidiacea) is reconstructed based on morphological characters - the first comprehensive morphology-based phylogenetic analysis for the Aplousobranchia. Monophyly of Aplousobranchia and its families were tested with samples of 14 families. The final character matrix comprised 47 characters and 41 genera as terminal taxa. Nine equally most parsimonious trees (length 161, CI = 0.5031, RI = 0.7922) were found. Characters describing replication, colony system formation, and branchial walls were the more important in phylogenetic reconstruction. These characters were more useful than others more traditionally used in ascidian taxonomy, such as: body division, position of the heart, gonads and epicardium. Characters not frequently used in phylogenetic analysis, such as body wall muscles, muscles associated with transversal blood vessels and arrangement of the larval papillae, also have phylogenetic information. Results supported monophyly of the Aplousobranchia sensu Lahille, 1887 including only Polycitoridae, Polyclinidae, and Didemnidae. On the other hand, Aplousobranchia including also Cionidae and Diazonidae is not monophyletic since Perophora and Ecteinascidia were included as ingroups in the cladogram, Ciona (now closer to Ascidia) was no longer included in Aplousobranchia and the position of Rhopalaea and Diazona is not resolved. We propose a revised classification based on this phylogenetic analysis, in which Aplousobranchia, with three new families and an indeterminate taxon, now has 15 families.
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43

Smołka, Szymon, e Katarzyna Krukiewicz. "Catalyst Design through Grafting of Diazonium Salts—A Critical Review on Catalyst Stability". International Journal of Molecular Sciences 24, n. 16 (8 agosto 2023): 12575. http://dx.doi.org/10.3390/ijms241612575.

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In the pursuit of designing a reusable catalyst with enhanced catalytic activity, recent studies indicate that electrochemical grafting of diazonium salts is an efficient method of forming heterogeneous catalysts. The aim of this review is to assess the industrial applicability of diazonium-based catalysts with particular emphasis on their mechanical, chemical, and thermal stability. To this end, different approaches to catalyst production via diazonium salt chemistry have been compared, including the immobilization of catalysts by a chemical reaction with a diazonium moiety, the direct use of diazonium salts and nanoparticles as catalysts, the use of diazonium layers to modulate wettability of a carrier, as well as the possibility of transforming the catalyst into the corresponding diazonium salt. After providing descriptions of the most suitable carriers, the most common deactivation routes of catalysts have been discussed. Although diazonium-based catalysts are expected to exhibit good stability owing to the covalent bond created between a catalyst and a post-diazonium layer, this review indicates the paucity of studies that experimentally verify this hypothesis. Therefore, use of diazonium salts appears a promising approach in catalysts formation if more research efforts can focus on assessing their stability and long-term catalytic performance.
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44

Kassanova, A. Zh, M. T. Yestayeva e M. O. Turtubayeva. "Arenediazonium sulfonates: synthesis, comparison of structural and physicochemical properties". Bulletin of the Karaganda University. "Chemistry" series 105, n. 1 (30 marzo 2022): 25–38. http://dx.doi.org/10.31489/2022ch1/25-38.

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Abstract (sommario):
Aromatic diazonium salts are important building blocks in organic synthesis. The present review is concerned with such aromatic diazonium sulfonates as tosylates, dodecylbenzenesulfonates, triflates, camphorsulfonates, silica sulfates. The first part of the review provides information on the synthesis and application of these diazonium salts. It is shown that these diazonium compounds are easily synthesized by diazotization of anilines with sodium nitrite or alkyl nitrites in the presence of corresponding sulfonic acids with high yields. These diazonium salts have found wide application in the synthesis of aromatic azides, halides, triazenes, azo dyes, stilbenes, biaryls, etc. The second part of the article presents information on the comparison of the results of X-ray analysis, infrared spectroscopy and thermal analysis. The structure of diazonium sulfonate salts corresponds to the structure of classical diazonium salts (chlorides, sulfates, tetrafluoroborates). A significant difference between arenediazonium sulfonates and other diazonium salts is their explosion safety and stability in an individual form. Arenediazonium tosylates, triflates and camphorasulfonates are easily soluble both in water and in polar organic solvents. Arenediazonium dodecylbenzenesulfonates are soluble in nonpolar organic media. These features of sulfonate salts are paramount for distinguishing characteristics of the effect of the acid anion on the stability, solubility and reactivity of diazonium salts.
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45

Hil Me, Muhammad Farhan, Mimi Hani Abu Bakar e Hazlinda Kamarudin. "Aryl Diazonium Modification on Graphite Electrode in Microbial Fuel Cell: A Review". Jurnal Kejuruteraan 32, n. 1 (28 febbraio 2020): 51–59. http://dx.doi.org/10.17576/jkukm-2020-32(1)-07.

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Usage of graphite electrode in a microbial fuel cell (MFC) is favored due to their electron conductivity and stability as a base material for the electrode. Also, graphite is favored as it allows the growth of biofilm, which can enhance the cell’s performance. The efficiency is reported improved through modification. Aryl diazonium modification has been reported to induce biofilm formation on the electrode faster. The modification can be done spontaneously or through electrografting of aryl diazonium salt onto the electrode surface. Control over the quantity of grafted aryl diazonium is essential. A thick layer will cause the performance of the system to drop, which may impede the electron transfer from biofilm to the electrode. Aryl diazonium is preferred as it allows a robust biofilm formation when used as a surface modification on the graphite electrode. Modification using aryl diazonium allows the electrode to be more accommodative for biofilm growth, which will increase the performance of the system. However, it does not act as a redox mediator for the system. It has been reported that power density obtained using aryl diazonium modified electrode is 250 mW.m-2, higher than unmodified graphite electrode of 125 mW.m-2. However, not all bacterial species is compatible with aryl diazonium modification. The unmodified graphite biocathode allows a higher power density compared to aryl diazonium modified biocathode. Hence, depending on the quality of aryl diazonium modification and the types of inoculum used, MFC performance can be further maximized.
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46

Hoan, Nguyen Thi Vuong, Nguyen Ngoc Minh, Thoi Thi Kim Nhi, Nguyen Van Thang, Vu Anh Tuan, Vo Thang Nguyen, Nguyen Mau Thanh, Nguyen Van Hung e Dinh Quang Khieu. "TiO2/Diazonium/Graphene Oxide Composites: Synthesis and Visible-Light-Driven Photocatalytic Degradation of Methylene Blue". Journal of Nanomaterials 2020 (8 gennaio 2020): 1–15. http://dx.doi.org/10.1155/2020/4350125.

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In the present article, the synthesis of TiO2/diazonium/graphene oxide and its photocatalytic activity for methylene blue (MB) degradation have been demonstrated. The functionalization of graphene oxide (GO) with diazonium salt (diazonium-GO) was conducted for enhancing the dispersibility of GO in distilled water. TiO2 was highly dispersed in diazonium-GO to form TiO2/diazonium/graphene. The obtained specimens were characterized by X-ray diffraction, FT-IR spectroscopy, Raman spectroscopy, UV-Vis spectroscopy, scanning electron microscope, transmission electron microscopy, and X-ray photoelectron spectroscopy. It was found that the TiO2 phase in TiO2/diazonium/GO composites can be controlled by adjusting the amount of ethanol or titanium oxide in the reactant mixture. The obtained composites exhibited photocatalytic activities for methylene blue degradation (MB). The composite with ac. 70% anatase can provide the highest MB degradation efficiency. The studying of some intermediates for MB photocatalytic degradation using LC-MS showed that structure of MB by the cleavage and oxidation of one or more of the methyl group substituent on the amine groups lead to form compounds with low molecular masses. Total organic carbon studies confirmed a complete mineralization of MB. The present catalyst was stable and recyclable after three times with a negligible loss of catalytic activity. In addition, the TiO2/diazonium/GO can also photocatalyze for the degradation of some other dyes (phenol, methyl red, and Congo red).
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Marshall, Nicholas, Andres Rodriguez e Scott Crittenden. "Diazonium-functionalized thin films from the spontaneous reaction of p-phenylenebis(diazonium) salts". RSC Advances 8, n. 12 (2018): 6690–98. http://dx.doi.org/10.1039/c8ra00792f.

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48

Postnikov, Pavel S., Marina Trusova, Ksenia Kutonova e Viktor Filimonov. "Arenediazonium salts transformations in water media: Coming round to origins". Resource-Efficient Technologies, n. 1 (30 giugno 2016): 36–42. http://dx.doi.org/10.18799/24056529/2016/1/37.

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Aromatic diazonium salts belong to an important class of organic compounds. The chemistry of these compounds has been originally developedin aqueous media, but then chemists focused on new synthetic methods that utilize reactions of diazonium salts in organic solvents. However, according to the principles of green chemistry and resource-efficient technologies, the use of organic solvents should be avoided. This review summarizes new trends of diazonium chemistry in aqueous media that satisfy requirements of green chemistry and sustainable technology.
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González, M. C. R., P. Carro, L. Vázquez e A. H. Creus. "Mapping nanometric electronic property changes induced by an aryl diazonium sub-monolayer on HOPG". Physical Chemistry Chemical Physics 18, n. 42 (2016): 29218–25. http://dx.doi.org/10.1039/c6cp05910d.

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50

Ahmad, Ahmad A. L., Bizuneh Workie e Ahmed A. Mohamed. "Diazonium Gold Salts as Novel Surface Modifiers: What Have We Learned So Far?" Surfaces 3, n. 2 (29 aprile 2020): 182–96. http://dx.doi.org/10.3390/surfaces3020014.

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Abstract (sommario):
The challenges of diazonium salts stabilization have been overcome by their isolation as metal salts such as tetrachloroaurate(III). The cleavage of molecular nitrogen from diazonium salts even at very low potential or on reducing surfaces by fine tuning the substituents on the phenyl ring expanded their applications as surface modifiers in forensic science, nanomedicine engineering, catalysis and energy. The robustness of the metal–carbon bonding produced from diazonium salts reduction has already opened an era for further applications. The integration of experimental and calculations in this field catalyzed its speedy progress. This review provides a narrative of the progress in this chemistry with stress on our recent contribution, identifies potential applications, and highlights the needs in this emerging field. For these reasons, we hope that this review paper serves as motivation for others to enter this developing field of surface modification originating from diazonium salts.
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