Oxovanadium(IV) complexes of cysteine characterized by electron spin resonance spectroscopy

Abstract

E.s.r. spectroscopy has been used to investigate the formation of complexes between oxovanadium(IV) and cysteine (2-amino-3-mercaptopropanoic acid) over a range of pH values. At least six complex species are observed with distinctly different spectral parameters and, although no ligand superhyperfine splitting is resolved, it is possible to produce tentative coordination structures for the various species by reference to previously published correlations for model oxovanadium(IV) complexes.