Enantiomers of the tris(trimethylenediamine)cobalt(III) ion of 100% optical purity: preparation and circular dichroism study
Abstract
Reaction of optically pure [Co(tn)3]3+ isomers (tn = H2NCH2CH2CH2NH2)(in aqueous solutions), obtained by a new chromatographic technique, with L-tartrate ions resulted in stereoselective circular dichroism changes similar to those for [Co(en)3]3+, (en = H2NCH2-CH2NH2), which implies the tris-lel-twist conformation†; of the complex at least in the ion-pair.