Hetero-nuclear Co–W complex CpttCoW(CO)2[Se2C2(B10H10)]2 from 16-electron half-sandwich complex CpttCo[Se2C2(B10H10)]

The 16-electron half-sandwich cobalt complex CpttCo[Se2C2(B10H10)] (Cptt = η5-1,3-tBu2C5H3) (3) has been synthesized by the reaction of [(THF)3LiSe2C2B10H10Li(THF)]2 (2) with CpttCo(CO)I2 (1). The hetero-binuclear complex CpttCoW(CO)2[Se2C2(B10H10)]2 (4) was obtained from the reaction of 3 with W(CO)3(py)3 in the presence of BF3 · Et2O. The molecular structures of 3 and 4 have been determined by X-ray crystallographic study.