A new high-yield synthesis of Cl3P=NSiMe3, a monomeric precursor for the controlled preparation of high molecular weight polyphosphazenes

The phosphoranimine, Cl3P=NSiMe3, was prepared using a new, high-yield (>80%), one-pot synthesis via oxidation of the chlorophosphine, Cl2PN(SiMe3)(2) with SO2Cl2 in ether. Cl3P=NSiMe3 is a valuable monomeric precursor in the synthesis of well-defined polyphosphazenes.