Expanding Family of π-Conjugated Trinuclear Dithiolenes: The Cases of Group 8 (RuII) and 10 (NiII and PtII) Metals

New π-conjugated trinuclear dithiolenes with group 8 (6, RuII) and 10 (7 and 8, NiII and PtII) metals were synthesized. Compounds 6 and 7 exhibited intense electronic communication through the phenylene bridge among the three dithiolene moieties during oxidation of the metalladithiolene rings, which has not been confirmed in the analogous family of group 9 metals, 1–5. Compound 8 exhibited an intense absorption band across the visible and near-IR regions, which was assigned as a charge transfer to the diimine and was red-shifted and broadened compared to the corresponding band of the mononuclear complex.