Synthesis,crystal strucure and electrochemistry of a new bimetallic nickel dithiolene complex (NBu_4~+)_2{C_2S_4[NiS_2C_2S_2(CO)_2}~(2-). Aprecursor for molecular conductors

摘要

The bimetallic complex (NBu4+)_2{C_2S_4[NiS_2C_2S_2(CO)]_2}~(2-)-has been prepared and its X-ray crystal structure has been determined. The anions are packed in layers parallel to the crystallographic (0 1 0) plane and are intermingled with parallel layers of closely packed cations. The geometry of the CS_4 (tetrathiooxalate. tto) moiety in the title compound is intermediate between that in tto4- and tto~ -systems. The solution electrochemistry reveals the reversible formation of the monoanionic species and the irreversible formation of the neutral species (or a species possessing a nonintegral oxidation state). Conducting salts have been obtained by complexation of the title anion with tetrathiafulvalene (TTF) and bis(ethylenedithio)- TTF (BEDT -TTF).