Abstract
Abstract Nickel(II) complexes of Schiff bases derived from salicylaldehyde and amines have so far been studied. In the present work, the nickel(II) complexes of N-hydroxyalkyl-salicylideneimines and related compounds are taken up, and the behavior of the hydroxyl group as to its coordination with the nickel(II) ion is examined. Bis(N-hydroxyalky 1-3-methoxysalicylideneiminato)-and bis(N-hydroxyalkyl-salicylideneiminato)-nickel(II) complexes have been prepared in the present work, where R=CH2CH2OH, CH2CH(CH3)OH, C(CH3)2CH2OH and CH2CH2CH2·OCH3. These complexes, except for the complexes with R=CH2CH2CH2OCH3, in the solid state are hexa-coordinated and show paramagnetism corresponding to two unpaired electrons. They are hexa-coordinated in non-donor solvents, except for the nickel(II) complexes with R=C(CH3)2CH2OH, which take a hexa-coordinated configuration in ethanol or methanol, a square-planar configuration in chloroform, and a different configuration in pyridine.
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