OPTICAL ISOMERS OF 2,2′-DIAMINOBIPHENYLBIS(ETHYLENEDIAMINE) COBALT(III) CHLORIDE AND ITS RELATED COMPLEXES1
- 1 November 1973
- journal article
- research article
- Published by Taylor & Francis in Journal of Coordination Chemistry
- Vol. 3 (2) , 161-167
- https://doi.org/10.1080/00958977308073803
Abstract
Several cobalt(III) complexes incorporating 2,2′-diaminobiphenyl(dabp) and other 2(2N)- or 4N-type ligands were prepared and resolved by chemical and chromatographic methods: (1) [Co(en)2(dabp)]Cl22H2O, (2) [Co(l-pn)2(dabp)] (ClO4)34H2O, (3) [Co(l-chxn)2(dabp)](ClO4)33H2O, (4) α-[Co(trien)(dabp)](ClO4)3, (5) α-[Co(2S,9S-dimetrien)(dabp)] (ClO4)3 2H2O, (6) α-[Co(3S,8S-dimetrien)(dabp)] (ClO4)33H2O, (7 [Co(tren)(dabp)]Cl35H2O, (8) [Co(bpy)2(dabp)] Cl33H2O. The complexes (1), (4) and (8) gave one pair of enantiomers, Δ(Λ) and Λ(δ), and the complexes (2) and (3) gave only one Δ-isomer. The absolute configuration of the complexes (5) and (6) was found to be Λ, and that of (7) was not determined because of unsuccessful resolution. The three geometric isomers of the complex (2) were separated and their structures assigned.Keywords
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