Bis[1,2-bis-(3,5-di-methyl-phen-yl)ethyl-ene-1,2-di-thiol-ato(1-)]nickel(II).

Abstract

The title compound, [Ni(C₁₈H₁₈S₂)₂], 1, crystallizes upon an inversion center in monoclinic P2₁/c with intra-ligand C-S and C-C_chelate bond lengths that are indicative of the radical monoanionic redox level for the di-thiol-ene ligand. The arene rings are canted at angles of 43.54 (4) and 71.36 (3)° with respect to the NiS₄ plane. Mol-ecules of 1 form columnar stacks along the a axis of the cell with a ∼59° angle between the mol-ecular plane and the stacking axis. Adjacent stacks alternate in the directionality of their cant relative to the stacking axis such that a 37.2° angle is defined by the core NiS₄ planes of mol-ecules from adjoining columns. Inter-molecular inter-actions are governed by methyl C-H→π_arene hydrogen bonds, with each mol-ecule enjoying four such inter-actions as acceptor and providing four such inter-actions as donor.