Metal carbonyl chemistry. Part 28. Reactions of decacarbonyldimanganese with trimethylolpropane phosphite

Abstract

Thermal reactions of [Mn₂(CO)₁₀] with the sterically constrained ligand P(OCH₂)₃CEt (L) produce the complexes [Mn₂(CO)₉L], [Mn₂(CO)₈L₂], [Mn₂(CO)₇L₃], and [Mn₂(CO)₆L₄]. The last compound can also be prepared from either [Mn₂(CO)₈L₂] or [Mn₂(CO)₇L₃] by reaction with L in the appropriate stoicheiometric quantities. All four substitution products are mixtures of isomers arising from substitution in both the axial and equatorial positions. The hydrides mer-trans-[MnH(CO)₃L₂], mer-[MnH(CO)₂L₃], and trans-[MnH(CO)₂L₃] have been obtained in low yield by heating [Mn₂(CO)₆L₄] in xylene solvents. Infrared and ¹H n.m.r. data for all the complexes are discussed.