An unusual molybdenum–oxygen interaction in the product from reaction of Mo{[CH2]3Br}(CO)3(η-C5H4R)(R = H, Me) with LiEt3BH; synthesis and X-ray structure of Mo(CO)2{η2-CH·O·[CH2]2CH2}(η-C5H4Me)

Abstract

Reaction of Mo{[CH₂]₃Br}(CO)₃(η-C₅H₄R)(R = H, Me) with LiEt₃ BH in tetrahydrofuran (THF) leads to Mo(CO)₂{η²-[graphic omitted]H₂}(η-C₅H₄R)(R = H, Me) which contains a new η² three-electron ligand bound in part by an unusual molybdenum–oxygen interaction; the structure of the methylcyclopentadienyl derivative has been characterised by X-ray diffraction.