The <i>cyclo</i>‐P₄ Ligand as 12‐Electron 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.