Crystal structure of the new low-dimensional metal Cs0.82[Pd{S2C2(CN)2}2]·0.5H2O

Abstract

The X-ray crystal structure of Cs_0.82[Pd{S₂C₂(CN)₂}₂]·0.5H₂O[where S₂C₂(CN)₂^2–= 1,2-dicyanoethylene-1,2-dithiolate]has revealed that the [Pd{S₂C₂(CN)₂}₂]^–anions are strongly associated as eclipsed dimer pairs. The arrangement of the anionic dimers is unusual and leads to short S ⋯ S contacts between dimers in two orthogonal directions. At low temperatures a three-fold superstructure along the a is observed. The structure is related to the metallic conductivity observed under pressure.