Organophosphoryl complexes of zirconium tetrachloride

Abstract

A number of coordination complexes of zirconium tetrachloride with phosphoryl ligands of the type (RO)³PO, (RO)₂P(O)R?, ROP(O)R?₂, and R₃PO have been prepared and characterized as complexes of the type ZrCl₄,2L. The shifts of the phosphoryl stretching frequency in the infrared on complex formation have been measured and are discussed with reference to the electronegativity of the substituents on the phosphorus atom.