Two new nickel–dmit-based molecular conductors based on heteroleptic polymetallic complexes: synthesis, structures and electrical properties

Abstract

Two heteroleptic dmit complexes of polynuclear nickel(II), [NEt₄]₂[Ni₅(edt)₄(dmit)₂] and [AsPh₄]₂[Ni₃(pdt)₂(dmit)₂]·0.5MeOH (dmit = 2-thione-1,3-dithiole-4,5-dithiolate, H₂edt = ethane-1,2-dithiol, H₂pdt = propane-1,2-dithiol) are synthesized and characterized by X-ray crystallography and display room-temperature conductivities of 1.75 × 10^–4 and 1.52 × 10^–5 S cm^–1; this is the first report of semiconducting heteroleptic dmit complexes consisting of more than two nickel(II) centres.