The chromiumtricarbonyl group as an electron acceptor in η6-complexes of stilbene and its derivatives
摘要:
The influence of nitro and chromiumtricarbonyl groups on susceptibility of stilbene and 4,4'-dimethoxystilbene to protophilic isotope hydrogen exchange were compared. Both groups assist in the reaction, but for the chromiumtricarbonyl substituent the simultaneous presence of an electron donor fragment (the methoxy group) in the stilbene ligand is necessary.