The Effect of Steric Condition in Cobalt(II), Nickel(II) and Copper(II) Complexes with Schiff Bases Obtained from Salicylaldehyde Derivatives and Diphenylmethylamine
- 1 January 1976
- journal article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 49 (1) , 163-168
- https://doi.org/10.1246/bcsj.49.163
Abstract
Cobalt(II), nickel(II) and copper(II) complexes with N-diphenylmethyl-ring-substituted salicylideneiminates (abbreviated as X–Sal–Dpm) have been synthesized, in order to examine the steric and electronic effect of a substituent diphenylmethyl group on the structure of the metal complexes. Compounds of the type M(X–Sal–Dpm)2 and their adducts of the type M(X–Sal–Dpm)2·nL have been isolated in crystals, n being 2 or 4 and L being benzene, acetone or pyridine. Both in the solid state and in non-donor solvents, the complexes Co(X–Sal–Dpm)2 have a tetrahedral configuration, and Ni(X–Sal–Dpm)2 and Cu(X–Sal–Dpm)2 have a square-planar configuration, irrespectively of substituents X. The results so far available seem to indicate that the steric hindrance caused by the substituent diphenylmethyl group against the square-planar configuration of the metal complexes may be smaller than that by isopropyl group.Keywords
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