2 research outputs found
Synthesis and Configuration of New Isomers of the Bis(aminocarboxylato )carbonatocobaltate(III) Ion
In the reaction between potassium tricarbonatocobaltate(III)
and the corresponding amino acid (glycine or ~-alanine) two new
geometrical isomers of the bis(aminocarboxylato)carbonatocobaltate(
III) ion have been obtained. In case of glycine, in addition to
the previously described1- 3 cis(N), cis(O)-isomer, the corresponding
cis(N), trans(O)-isomer was also obtained, whereas in the reaction
with ~-alanine the trans(N), cis(O)-isomer was prepared. The configuration
of the trans(N)-isomer was established using its electronic
spectrum, whereas the configuration of the other two
isomers was determined by means of PMR spectroscopy. In addition,
the cis, cis-isomer was resolved into enantiomers by means
of A - ( + )ss9-cis(N02), trans(N)-isomer of the bis(S-arginine)dinitrocobalt(
III) ion. The absolute configuration of the tJ. - (-)589-
-cis(N), cis(O)-isomer was assumed by comparing its CD spectrum
with that of the A - ( + )58rcis(N), cis(O)-isomer of the carbonatobis-(
S-valinato)cobaltate(III) ion