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Jun, Moo-Jin; Park, Chang-Woo; Park, Youn Bong; Cheon, Jin Woo; Choi, Sung-Rack
Dichloro, Alanine and S-Methylcysteine Cobalt (III) Complexes of Ethylenediamine-N,N ′ -di- α -isobutyric Acid
Bulletin of the Korean Chemical Society, 11(4), 354-357
Date: Aug 20, 1990

Abstract

Synthesis of dichloro cobalt (Ⅲ) complexes of a flexible N2O2-type tetradentate ligand, ethylenediamene-N, N'-di- -isobutyric acid (eddib), has yielded two geometrical isomers, s-cis-(Co (eddib) Cl2)-and uns-cis-(Co (eddib) Cl2)-.  A series of substitution reactions, (Co (eddib) Cl2)- →(CO (eddib) Cl H2O)→(Co (eddib) CO_3)-→(Co (eddib (H2O)2)+ have been run for each of the two geometrical isomers. The reaction between the s-cis-(Co (eddib) Cl2)- complex and L-alanine (L-als) or S-methyl-L-cysteine (L-mcy) gave the meridional s-cis-[Co (eddib)(aa))(aa= L-ala or L-mcy) complex. The S-methyl-L-cysteine was found to coordinate to cobalt (Ⅲ) ion via the nitrogen and oxygen donor atoms.

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