Preparation and characterisation of new oxovanadium(IV) Schiff base complexes derived from salicylaldehyde and simple dipeptides

A range of mostly new oxovanadium(IV) complexes is described. They contain coordinated Schiff bases, made from simple dipeptides (glycylglycine, glycy lsarcosine, L-alanylglycine, L-alanyl-L-alanine, D,L-alanyl-D,L-alanine and L-serylglycine), and salicylaldehyde. The compounds are characterised and the nature of their coordination spheres shown by analysis, TLC, by appropr iate spectroscopy (EPR, IR, electronic and circular dichroism of solution a nd solids) and by magnetic susceptibility measurements. Serylglycine and th reonylglycine are formed by reaction of VO(salGlyGly) with formaldehyde and acetaldehyde, respectively. (C) 2000 Elsevier Science S.A. All rights rese rved.