The anisotropic pi-effect of the nitro group in ammine-nitro cobalt(III) complexes

Abstract

The analysis of crystal structures of the series of ammine-nitro cobalt(III) complexes has shown that Co-NO2 bond lengths can be successfully rationalized on the basis of the anisotropic pi-effect of nitro groups. This effect governs both the orientation of the nitro group and the Co-NO2 length, and explains the irregularities in the increase of the latter with the increasing number of NO2 groups present in the coordination sphere. (C) 1997 Elsevier Science Ltd.