Reactions of oxo- and peroxo-molybdenum complexes with B(C6F5)3: crystal structures of cis-[MoO{OB(C6F5)3}(η2-ONEt2)2] and cis-[MoO{OB(C6F5)3}{η2-PhN(O)C(O)Ph}2]

Abstract

The oxometal complexes [MoO₂(η²-O-NR₂)₂], R = Et or CH₂Ph, reacted with the strong Lewis acid B(C₆F₅)₃ at their oxo functionality to give cis-[MoO{OB(C₆F₅)₃}(η²-ONR₂)₂], (R = Et 1 or CH₂Ph 2). Reaction of the peroxo complex [MoO(O₂){η²-PhN(O)C(O)Ph}₂] with the same Lewis acid led initially to the formation of [MoO(O₂){B(C₆F₅)₃}{η²-PhN(O)C(O)Ph}₂] 3, which decomposes to form [MoO{OB(C₆F₅)₃}{η²-PhN(O)C(O)Ph}₂] 4. Compounds 1 and 4 have been characterised by X-ray crystallography.