~(61)Ni NMR Spectroscopy of Di- and Tricarbonylnickel Complexes

摘要

Di- and tricarbonylnickel phosphine complexes (22) were prepared and their liquid-state ~(61)Ni NMR spectra were recorded with the use of special solenoid glass sample tubes and a solenoid probehead, which are described. The acquired chemical shifts δ(~(61)Ni), linewidths v_(1/2)(Ni), relaxation times T_1 and coupling constants ~1J(~(61)Ni, ~(31)P) are discussed with reference to the electronegativity of the substituents at the phosphine ligands and the Tolman angle 9 of the latter.