Influence of bulky groups in single-component conductors based on neutral radical gold bis(dithiolene) complexes

A novel single-component conductor derived from neutral radical gold bis(dithiolene) complexes is prepared based on the original reactivity of t BuN-substituted 1,3-thiazoline-2-thione heterocycle to give a t BuS-substituted thiazole ring. The corresponding 2-( tert- butylthio)-1,3-thiazole-4,5-dithiolate ligand ( t BuS-tzdt) forms the d 8 anionic complex [Au( t BuS-tzdt) 2 ] − , easily oxidized through electrocrystallization into the neutral radical [Au( t BuS-tzdt) 2 ] · . The effect of increasingly bulky R groups (R = Et, EtOH, t Bu), in the series of such radical complexes [Au(RS-tzdt) 2 ] · , is investigated, with a focus on their solid state organization, either into face-to-face dimers or into non-dimerized, uniform stacks.