Metal carbonyl chemistry. Part I. The reactions of phosphorus-containing ligands with hydridopentacarbonylmanganese

Abstract

Hydridotetracarbonyltriphenylphosphinemanganese(I) has been prepared by the reaction of triphenylphosphine with hydridopentacarbonylmanganese at room temperature. Direct reaction of the latter gives, under appropriate conditions, the compounds HMn(CO)₃L₂ as cis-isomers where L =(Ph₂P·CH₂)₂ or (PhO)₃P and as trans-isomers where L = Ph₃P, (PhO)₂PMe, or (PhO)₃P. Conversion of H–Mn to X–Mn (X = Cl, Br, or I) relates certain of these compounds to compounds previously prepared by alternative routes. The cis-isomer HMn(CO)₃[PhO₃P]₂ does not isomerise to the trans-isomer when heated, but loses hydrogen to give an unidentified compound.