Novel P–O bond forming reactions via coupling of phosphinidene and phosphidoxo groups on a tetranuclear ruthenium cluster: face capping Ph2POPR ligands and the X-ray structure of Ru4(CO)8(µ-CO)(µ3-η2-CCBut)[µ3-η2-PPh2(OPPh)]
Abstract
Reaction of the alkynylphosphine oxide Ph2P(O)CCBut with square-pyramidal nido-Ru4(CO)13(µ3-PR)(1a, R = Ph; 1b, R = NPri2) affords a novel example of P–O bond synthesis to yield the ligands Ph2POPR, coordinated on a triangular face of the clusters Ru4(CO)8(µ-CO)(µ3-η2-CCBut)[µ3-η2-PPh2(OPPh)](2a, R = Ph; 2b, R = NPri2).