Solution state 113Cd NMR investigation of an extensive series of [HB(3,5-Me 2pz) 3]Cd(alkyl) complexes

Abstract

Analysis of the 113Cd NMR chemical shifts of a series of alkylcadmium complexes of the formula [HB(3,5-Me 2pz) 3]CdR (R = methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl and phenyl) demonstrates that the large chemical shift difference between the methyl and ethyl derivatives of alkylcadmium complexes is simply a β effect. On average, substitution of a hydrogen atom in [HB(3,5-Me 2pz) 3]CdCH 3 by an alkyl substituent causes a chemical shift of the 113Cd resonance by 49.2 ppm in the shielding direction. The γ and δ and effects are negligible.