Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Circular Dichroism and Absolute Configuration of Triammine(sarcosinate-N-monopropionato)cobalt(III) Chloride and Several Analogues
Ken-ichi OkamotoJinsai HidakaYoichi Shimura
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1973 Volume 46 Issue 10 Pages 3134-3138


cis(O)- and trans(O)-Trianimine(sarcosinate-N-nionopropionato)cobalt(III) salts, which have an asymmetrically coordinated nitrogen atom, were prepared and the cis(O) isomer was optically resolved through its diastereomeric salt with (+)546-(ethylenediaminetetraacetato)cobaltate(III) anion. The less soluble diastereomeric salt produced (+)546-cis(O) isomer of the triammine cation, and its absolute configuration (R) was established from circular dichroism spectrum, referring to the stereochemistry of the several analogous triammine complexes stereo-specifically formed, which contain L-alaninate- and L-prolinate-N-monocarboxylate ligands, where the carboxylate stands for acetate or propionate. Two diastereomeric isomers, R(N)–L(C) and S(N)–L(C), were synthesized for the cis(O)-(L-alaninate-N-monopropionato)triamminecobalt(III) perchlorate salt.

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