The preparation, characterisation, and some reactions of [Os3(CO)11-(NCMe)]

Abstract

The cluster [Os₃(CO)₁₁(NCMe)] has been prepared from the reaction of [Os₃(CO)₁₂] with NMe₃O in the presence of MeCN. This cluster reacts with ligands L (L = CO, PPh₃, CH₃C₆H₄SO₂CH₂NC-p, C₂H₄, or C₅H₅N) to produce [Os₃(CO)₁₁L] derivatives and with HX (X = Cl, Br, or I) to form [Os₃(CO)₁₁HX], [Os₃(CO)₁₀HX](X = Cl, Br, or I) and [Os₃(CO)₉HX](X = I). Evidence for the formation of an uncharacterised intermediate, possibly [Os₃(CO)₁₁(NCMe)H]X, is also presented. Possible structures of these complexes are also discussed.