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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 11, Number 4
BKCSDE 11(4)
April 20, 1990 

Dichloro, Alanine and S-Methylcysteine Cobalt (Ⅲ) Complexes of Ethylenediamine-N,N'-di-α-isobutyric Acid
Moo-Jin Jun*, Chang Woo Park, Youn Bong Park, Jin Woo Cheon, Sung Rack Choi
Synthesis of dichloro cobalt (Ⅲ) complexes of a flexible N2O2-type tetradentate ligand, ethylenediamene-N,N'-di-α-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)CO3)- → (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.
354 - 357
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