Synthesis and molecular structure of hetero-metallic cluster CpCoW(CO) 2(S 2C 2B 10H 10) 2 and binuclear half-sandwich Co complex [Cp ∗Co(S 2C 2B 10H 10)] 2(bpo) with dichalcogenolate o-carboranyl ligands

Abstract

The mononuclear 16-electron “pseudo-aromatic” dithio-o-carboranylcobalt complex CpCo(S 2C 2B 10H 10) ( 1a) and Cp ∗Co(S 2C 2B 10H 10) ( 1b) have been prepared by treatments of CpCo(CO)I 2 and Cp ∗Co(CO)I 2 with the dilithium dithiolato carborane (Li 2S 2C 2B 10H 10). Both of 1a and 1b react with 2,5-bis(4-pyridyl)-1,3,5-oxadiazole (bpo) to give 2a and 2b. Complex 1a reacts with low valent transition metal complex W(CO) 3(py) 3 to produce a hetero binuclear Co–W complex 3a. The molecular structures of 1b, 2b and 3a have been determined by X-ray crystallography.