| Автор | Majumder, Kanchana |
| Автор | Peng, Shie-Ming |
| Автор | Bhattacharya, Samaresh |
| Дата выпуска | 2001 |
| dc.description | Reaction of 2-arylazo-4-methylphenol, (H2ap-R, where H2 indicates the two protons (the phenolic proton and one phenyl proton at the ortho position of the arylazo fragment) that undergo dissociation upon complexation) with [Os(PPh3)3Br2] in the presence of a base afford two types of organometallic complexes of osmium(III), viz. red [Os(PPh3)2(ap-R)Br] and brownish-green [Os(PPh3)(ap-R)(Nâ O)] [Nâ O is an iminosemiquinonate ligand generated from the 2-(arylazo)phenol via N.dbd6;N bond cleavage]. The structures of [Os(PPh3)2(ap-Cl)Br] and [Os(PPh3)(ap-Cl)(Nâ O)] have been determined by X-ray crystallography. In the [Os(PPh3)2(ap-R)Br] complexes, the ap-R ligand coordinates to osmium as a tridentate C,N,O donor ligand forming two five-membered chelate rings and the two PPh3 ligands are trans. In the [Os(PPh3)(ap-R)(Nâ O)] complexes, osmium is bound to one PPh3, one ap-R ligand coordinated as a tridentate C,N,O donor ligand and one iminosemiquinonate ligand. The [Os(PPh3)2(ap-R)Br] complexes are paramagnetic (low-spin d<sup>5</sup>, Sâ =â 1/2) and show anisotropic EPR spectra at 77 K. The [Os(PPh3)(ap-R)(Nâ O)] complexes are diamagnetic and show sharp <sup>1</sup>H and <sup>13</sup>C NMR signals. In acetonitrile solution all the complexes display intense charge-transfer transitions in the visible region. Cyclic voltammetry on these complexes in acetonitrile solution shows an osmium(III)â osmium(IV) oxidation positive to SCE and an osmium(II)â osmium(III) reduction negative to SCE. Two irreversible oxidations are also displayed by all the [Os(PPh3)(ap-R)(Nâ O)] complexes in the range 1.10â 1.76 V vs. SCE. |
| Формат | application.pdf |
| Издатель | Royal Society of Chemistry |
| Название | Cyclometallation and N.dbd6;N bond cleavage of 2-(arylazo)phenols by osmium. Synthesis, structure and redox propertiesâ Electronic supplementary information (ESI) available: microanalytical and EPR data. See http://www.rsc.org/suppdata/dt/b0/b007486l/ |
| Тип | ART |
| Журнал | Dalton Transactions |
| Первая страница | 284 |
| Последняя страница | 288 |
| Аффилиация | Majumder Kanchana; Department of Chemistry, Inorganic Chemistry Section, Jadavpur University |
| Аффилиация | Peng Shie-Ming; Department of Chemistry, Inorganic Chemistry Section, Jadavpur University |
| Аффилиация | Bhattacharya Samaresh; Department of Chemistry, Inorganic Chemistry Section, Jadavpur University |
| Выпуск | 3 |
| Библиографическая ссылка | R. Hage, J. P. Collin, S. Guillerez, J. P. Sauvage, F. Barigelletti, L. Flamigni, L. D. Cola, V. Balzani, L. D. Cola, F. Barigelletti, V. Balzani, P. Belser, A. V. Zelewsky, C. Seel, M. Frank, F. Vogtle, E. C. Constable, C. E. Housecroft, M. D. Ward, M. Furue, K. Maruyama, Y. Kanematsu, T. Kushida, M. Kamachi, F. Barigelletti, L. Flamigni, V. Balzani, J. P. Collin, J. P. Sauvage, A. Sour, E. C. Constable, A. M. W. C. Thompson, K. Kalyansundaram, S. M. Zakeeruddin, M. K. Nazeeruddin, M. G. Richmond, M. D. Ward, M. D. Ward, B. R. McGarvey, Coord. Chem. Rev., 1991, 111, 161, Coord. Chem. Rev., 1991, 111, 291, Coord. Chem. Rev., 1991, 111, 255, Coord. Chem. Rev., 1993, 124, 183, Coord. Chem. Rev., 1993, 127, 1, Coord. Chem. Rev., 1994, 132, 201, Coord. Chem. Rev., 1994, 132, 209, Coord. Chem. Rev., 1994, 132, 259, Coord. Chem. Rev., 1995, 141, 63, Coord. Chem. Rev., 1995, 146, 99, Coord. Chem. Rev., 1997, 164, 483, Coord. Chem. Rev., 1998, 170, 75 |
| Библиографическая ссылка | F. Basuli, S. M. Peng, S. Bhattacharya, Inorg. Chem., 1997, 36, 5645 |
| Библиографическая ссылка | F. Basuli, S. M. Peng, S. Bhattacharya, Polyhedron, 1998, 17, 2191 |
| Библиографическая ссылка | F. Basuli, S. M. Peng, S. Bhattacharya, Polyhedron, 1998, 18, 391 |
| Библиографическая ссылка | F. Basuli, M. Ruf, C. G. Pierpont, S. Bhattacharya, Inorg. Chem., 1998, 37, 6113 |
| Библиографическая ссылка | A. Das, F. Basuli, S. M. Peng, S. Bhattacharya, Polyhedron, 1999, 18, 2729 |
| Библиографическая ссылка | F. Basuli, S. M. Peng, S. Bhattacharya, Inorg. Chem., 2000, 39, 1120 |
| Библиографическая ссылка | H. M. Haendur, G. M. P. Smith, K. Ueno, J. A. J. Jarvis, R. J. Price, K. C. Kalia, O. A. Dyachenko, L. O. Atovmyan, S. M. Aldosin, I. N. Marov, D. G. Gambarov, V. K. Belyaeva, A. G. Guseinov, A. B. Sokolov, C. R. Sinha, D. Bandopadhyay, A. Chakravorty, R. Bhawmik, H. Biswas, P. Bandopadhyay, J. Am. Chem. Soc., 1940, 62, 1669, J. Am. Chem. Soc., 1957, 79, 3066, Acta Crystallogr., 1961, 14, 961, J. Chem. Soc. A, 1969, 1296, Indian J. Chem., 1970, 8, 1035, J. Chem. Soc., Chem. Commun., 1975, 105, Russ J. Inorg. Chem., 1948, 29, 1452, J. Chem. Soc., Chem. Commun., 1988, 468, J. Org. Met. Chem., 1995, 81, 498 |
| Библиографическая ссылка | P. J. Desrosiers, R. S. Shinamoto, M. A. Deming, T. C. Flood, M. A. Esteruelas, F. J. Lahoz, A. M. Lopez, E. Onate, L. A. Oro, E. Arcia, D. S. Kolwaite, E. Rosenberg, K. Hardcastle, J. Ciurash, R. Duque, R. Gobetto, L. Milone, D. Osella, M. Botta, W. Dastru, A. Viale, I. Fiedler, Organometallics, 1989, 8, 286, Organometallics, 1995, 14, 2496, Organometallics, 1998, 17, 415 |
| Библиографическая ссылка | S. Bhattacharya, C. G. Pierpont, A. Pramanik, N. Bag, G. K. Lahiri, A. Chakravorty, Inorg. Chem., 1991, 30, 2906, J. Chem. Soc., Dalton Trans., 1992, 101 |
| Библиографическая ссылка | Z. Gross, A. Mohammed, Inorg. Chem., 1996, 35, 7260 |
| Библиографическая ссылка | M. A. Lockwood, P. E. Fanwick, O. Eisenstein, I. P. Rothwell, S. D. Gray, J. L. Thorman, V. A. Adamian, K. M. Kadish, L. K. Woo, M. A. Aubart, R. G. Bergman, F. Y. Petillon, P. Schollhammer, J. Talarmin, A. Ghosh, P. Majumdar, L. R. Falvello, G. Mostafa, S. Goswami, J. Am. Chem. Soc., 1996, 118, 2762, Inorg. Chem., 1998, 37, 1, Organometallics, 1999, 18, 811, Inorg. Chem., 1999, 38, 1954, Organometallics, 1999, 18, 5086 |
| Библиографическая ссылка | E. P. Dwyer, J. W. Hogarth, Inorg. Synth., 1957, 5, 204 |
| Библиографическая ссылка | P. R. Hoffman, K. G. Caulton, J. Am. Chem. Soc., 1975, 97, 4221 |
| Библиографическая ссылка | D. T. Sawyer, J. L. Roberts, Jr., M. Walter, L. Ramaley, Experimental Electrochemistry for Chemists, Wiley, New York, 1974, pp. 167â 215, Anal. Chem., 1973, 45, 165 |
| Библиографическая ссылка | M. H. Esteruelas, F. J. Lahoz, A. M. Lopez, E. Onate, L. A. Oro, Organometallics, 1995, 14, 415 |
| Библиографическая ссылка | A. Pramanik, N. Bag, D. Ray, G. K. Lahiri, A. Chakravorty, K. Majumder, S. M. Peng, S. Bhattachyarya, Inorg. Chem., 1991, 30, 410 |
| Библиографическая ссылка | R. E. De-Simone, R. S. Drago, E. M. Kober, T. J. Meyer, G. K. Lahiri, S. Bhattacharya, B. K. Ghosh, A. Chakravorty, J. Am. Chem. Soc., 1970, 92, 2343, Inorg. Chem., 1983, 22, 1614, Inorg. Chem., 1987, 26, 4324 |
| Библиографическая ссылка | C. N. Verani, S. Gallert, E. Bill, T. Weyhermuller, K. Wieghardt, P. Chaudhuri, Chem. Commun., 1999, 410 |
| Библиографическая ссылка | S. Bhattacharya, C. G. Pierpont, S. Bhattacharya, C. G. Pierpont, S. Bhattacharya, C. G. Pierpont, S. Bhattacharya, C. G. Pierpont, Inorg. Chem., 1991, 30, 1511, Inorg. Chem., 1991, 30, 2906, Inorg. Chem., 1992, 31, 2020, Inorg. Chem., 1994, 33, 6038 |
