Cobalt(III) and Chromium(III) Complexes with Ethylenediaminemonoacetic Acid

Abstract

Abstract Cobalt(III) and chromium(III) complexes with ethylenediaminemonoacetic acid (EDMA), [Co(edma)2]Cl·2H2O and [Cr(edma)2Cl·3H2]O, (edma: H2NCH2CH2NHCH2COO−), were prepared. The former complex was isolated as two geometrical isomers. From the electronic absorption spectra, the two isomers were assigned to trans and cis forms with respect to the carboxylate oxygen atoms coordinated. Chromium(III) complex was concluded to have the trans form by comparing the IR spectrum with those of the above two isomers of cobalt (III) complexes.