Complexes of N(4)-cyclohexylsemicarbazones and N(4)-cyclohexylthiosemicarbazones derived from 2-formyl-, 2-acetyl- and 2-benzoylpyridine
Tóm tắt
2-Formyl-, 2-acetyl- and 2-benzoylpyridine N(4)-cyclohexylsemicarbazone and N(4)-cyclohexylthiosemicarbazone complexes of cobalt(II, III), nickel(II) and copper(II) have been prepared and characterized by molar conductivities, magnetic susceptibilities and spectroscopic techniques. For many of the complexes, coordination is by the neutral ligand, the main exceptions being the cobalt(III) complexes of the three thiosemicarbazones and three of the benzoylpyridine derivatives. Thus, bonding is via the pyridyl nitrogen, azomethine nitrogen and thione/thiolato sulfur. The five-coordinate copper(II) complex of 2-acetylpyridine N(4)-cyclohexylthiosemicarbazone, [Cu(HAc4CHex)Cl2], approaches square pyramidal stereochemistry with the basal Cu—Cl bond significantly shorter than the apical Cu—Cl bond.
Tài liệu tham khảo
D. X. West, S. B. Padhye and P. B. Sonawane, Struct. Bonding, 76, 1 (1991); D. X. West, A. E. Liberta, S. B. Padhye, R. C. Chikate, P. B. Sonawane, A. S. Kumbhar and R. G. Yerande, Coord. Chem. Rev., 123, 49 (1993).
J. P. Scovill, D. L. Klayman and C. F. Franchino, J. Med. Chem., 25, 1261 (1982).
D. X. West, A. S. Kumbhar, S. B. Padhye and A. E. Liberta, Transition Met. Chem., 16, 276 (1991); 17, 247 (1992).
D. X. West, R. D. Profilet and J. L. Hines, Transition Met. Chem., 13, 467 (1988); D. X. West, H. Gebremedhin, T. J. Romack and A. E. Liberta, Transition Met. Chem. 19, 426 (1994).
D. X. West, I. S. Billeh, G. A. Bain, J. Valdés-Martínez, K. H. Ebert and S. Hernández-Ortega, Transition Met. Chem., 21, 572 (1996).
D. X. West and J. P. Jasinski, unpublished observations.
K. R. Koch, J. Coord. Chem., 22, 289 (1991).
D. X. West, B. L. Mokijewski, H. Gebremedhin, and T. J. Romack, Transition Met. Chem., 17, 384 (1992).
D. X. West, C. E. Ooms, J. S. Saleda, H. Gebremedhin and A. E. Liberta, Transition Met. Chem., 19, 553 (1994).
D. X. West, J. S. Ives, J. Krejci, M. M. Salberg, T. L. Zumbahlen, G. A. Bain, A. E. Liberta, J. Valdés-Martínez, S. Hernández-Ortega and R. A. Toscano, Polyhedron, 14, 2189 (1995).
D. X. West, C. S. Carlson, K. J. Bouck and A. E. Liberta, Transition Met. Chem. 16, 271 (1991).
G. C. Levy and G. L. Nelson, Carbon-13 Nuclear Magnetic Resonance for Organic Chemists, Wiley Interscience, New York, 1972, p. 125.
A. Castineiras, H. Gebremedhin, T. J. Romack and D. X. West, Inorg. Chim. Acta, 216, 229 (1994).
C. Maichle, A. Castineiras, R. Carballo, H. Gebremedhin, M. A. Lockwood, C. E. Ooms, T. J. Romack and D. X. West, Transition Met. Chem. 20, 228 (1995).
P. Sonawane, R. Chikate, A. Kumbhar and S. Padhye, Polyhedron, 13, 395 (1994).
M. D. Timken, S. R. Wilson and D. N. Hendrickson, Inorg. Chem., 24, 3450 (1985).
D. Kovala-Demertzi, A. Domopoulou, M. A. Demertzis, J. Valdés-Martínez, S. Hernández-Ortega, G. Espinosa-Pérez, D. X. West, M. M. Salberg, G. A. Bain and P. D. Bloom, Polyhedron, 15, 2587 (1996).
D. X. West, H. Gebremedhin, R. J. Butcher, J. P. Jasinski and A. E. Liberta. Polyhedron, 12, 2489 (1993).
M. Suzuki, H. Kanatomi, H. Koyama and I. Murase, Bull. Chem. Soc. Jpn., 53, 1961 (1980); D. Kovala-Demertzi, J. M. Tsangaris and N. Hadjiliadis, Transition Met. Chem., 8, 140 (1983); M. Suzuki, H. Kanatomi, Y. Demura and I. Murase, Bull. Chem. Soc. Jpn., 57, 1003 (1984).
A. B. P. Lever, Inorganic Electronic Spectroscopy, Elsevier, New York, 1968, p. 339.
A. B. P. Lever, J. Chem. Educ., 45, 711 (1968).
B. J. Hathaway, Struct. Bonding (Berlin) 4, 60 (1973).