ChemInform Abstract: Synthesis, Characterization, and Properties of the η2-Acyl Complexes Mo(η2-COCH2CMe3)X(PMe3)4 (X: Cl, Br).

ChemInform Abstract

The η2-acyl title complexes (III) are prepared according to the scheme. They decompose in solution with dissociation of PMe₃. This reaction occurs faster in the presence of small amounts of water with formation of the hydroxo species (V). Carbonylation of (IIIa) affords successively (VIIa) and (VIIb). Finally, the reaction of (I) with CH₂Cl₂ (VIII) yields the seven-coordinate anionic compound (IX). The structure of the pentagonal-bipyramidal bromo-η2-acyl complex (IIIb) (space group P2₁2₁2₁, Z=4) is determined by X-ray analysis.