Optically active co-ordination compounds. Part III. Acid-catalysed aquations of resolved complexes of cobalt(III)

Abstract

The substitution, by water, of co-ordinated nitro-groups in optically active complexes of cobalt(III) of the type [Co en₂X(NO₂)]ⁿ⁺ in the presence of acids has been shown to occur with retention of optical configuration. The similar reaction of active cis-dinitrobisethylenediaminecobalt(III) salts with hydrochloric acid is shown to form active chloronitrobisethylenediaminecobalt(III) salts; for the reaction of nitroamminebisethylenediamine-cobalt(III) salts with hydrochloric acid, the successive optical rotatory dispersion spectra pass through isorotatory points.