Co-ordination complexes of amino-acids: separation and spectroscopic properties of the diastereoisomers of some amino-acidatobis(acetylacetonato)cobalt(III) complexes

Abstract

Fractional crystallisation and column chromatography on D-lactose, have been sucessfully used to separate the diastereoisomers of L-phenylalaninatobis(acetylacetonato) cobalt(III) and L-valinatobis(acetylacetonato)cobalt(III but were unsuccessful in fully separating the isomers of the corresponding complex of L-alanine. The o.r.d., c.d., and n.m.r. spectra of the diastereoisomers obtained have been recorded and related to their possible configurations.