TERNARY CHROMIUM(III) NUCLEOTIDE AMINO-ACID COMPLEXES - L-METHIONINE, L-SERINE AND GLYCINE DERIVATIVES

The first ternary Cr(III)-nucleotide-amino acid complexes (nucleotide: 5′AMP, 5′CMP; amino acid: L-serine, L-methionine, glycine) are described. The complexes have been characterized by elemental and thermogravimetric analyses, IR and electronic spectroscopy and EPR measurements. In all cases the interaction of Cr(III) with the nucleotide seems to occur mainly through the phosphate group, whereas the amino acid binds to Cr(III) through the carboxylic and amino groups. Some of the complexes show distortions from octahedral geometry, but these distortions appear to be small resulting in values of the zero field splitting parameter D < 0.1 cm-1. © 1990.