The cyclo-P4 Ligand as 12-Electron Donor [Der cyclo-P4-Ligand als 12-Elektronen-Donor]

Abstract

White phosphorus and a suitable metal complex fragment are always good for surprises. Reaction of [W(CO)5thf] with P4 in THF affords the complex shown on the right, in which the square-planar P4 ligand serves as a 12-electron donor. The analogous chromium complex is also accessible in this way.