THIOCARBAMATE COMPLEXES. III. REACTION OF AMINES WITH NICKEL(II) DERIVATIVES

Abstract Solution studies of the reactions of bis(dimethylthiocarbamato)nickel(II) and bis(di-n-propylthiocarbamato)-nickel(II) with a variety of primary, secondary, and aromatic amines have been conducted. Primary amines yield either octahedral bis or tetrakis amine adducts, the latter presumably containing monodentate oxygen-bonded thiocarbamate ligands. Normal secondary amines yield bis adducts in equilibrium with a pentacoordinate species, while α-hindered secondary amines yield an anomalous compound of undetermined structure. Aromatic amines yield bis adducts, with the exception of 2,6-lutidine, which exhibits an equilibrium with a pentacoordinate species. The PMR contact shifts and Ai values are reported for the amine protons.