HETEROBIFUNCTIONAL PHOSPHORUS-NITROGEN COMPOUNDS - IMINOPHOSPHORANOPHOSPHINES AND THEIR COMPLEXES

Heterobifunctional phosphorus compounds have been prepared by oxidizin g one phosphorus atom of a bis(phosphine) with azides. A variety of ba ckbone structures have been used with one and two carbon chains, satur ated and unsaturated structures and RN. Some degree of steric control appears to limit the extent of oxidation in cis bis(phosphines) with r igid backbones. Trimethylsilyl azide gives silylated iminophosphoranes with a reactive functionality on the imine nitrogen which can be repl aced via metathetical elimination of Me3SiX or converted to the trimet hylsiloxy metal derivative by rearrangement of the trimethylsilyl grou p to terminal oxygen of a highly oxidized metal oxo precursor. Structu ral features of several examples of the heterobifunctional phosphorus compounds and their derivatives are described.