Abstract
The Schiff bases, H–SalphenNR2, derived from salicylaldehyde and NN-dialkyl-o-phenylenediamines, where R = Me, Et, Prn, and Bun react with cobalt acetate to give complexes which have been assigned a structure involving bridging acetate groups. Only when R = Me were complexes isolated with cobalt halides, the far-infrared spectra of which suggests halogen-bridged dimers of SalphenNMe2·CoII·X, in which the cobalt(II) ion is pentaco-ordinate. Bis(salicylaldehydato)cobalt(II) reacts stepwise with NN-dimethyl- and NN-diethyl-o-phenylenediamine to give SalphenNR2·CoII·Sal and (SalphenNR2)2CoII. The salicylaldehyde moiety in SalphenNR2·CoII·Sal reacts with other amines to give mixed 2:1 Schiff-base complexes.
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