Optically active co-ordination compounds. Part XXXVII. Chiroptical properties of the ethylenediaminebis(1,10-phenanthroline)cobalt(III) ion

Abstract

The ion [Co(en)(phen)₂]³⁺ has been resolved into enantiomers by use of (–)tris(cysteinesulphinato)cobaltate(III). Contributions in its c.d. spectrum from the ‘exciton’ bands of the cis-bis(1,10-phenanthroline) moiety, and from the d–d bands of the cobalt ion, provide a correlation between the empirical configurational assignment based on d–d bands and the assignment based on the inherently dissymmetric exciton region.