⁶¹Ni NMR spectroscopy of di‐ and tricarbonylnickel complexes

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 1 J ( 61 Ni, 31 P) are discussed with reference to the electronegativity of the substituents at the phosphine ligands and the Tolman angle θ of the latter.