METHYL HYDRAZINE AS A BUILDING-BLOCK FOR A BRIDGE BETWEEN PHOSPHINOAMINE [R(2)P-N(R)-PR(2)] AND PHOSPHORUS HYDRAZIDE [R(2)P-N(R)-N(R)-PR(2)] - SYNTHESIS AND COORDINATION CHEMISTRY OF A NOVEL TRIPHOSPHINE [(ME(2)P)(2)N-N(ME)(PME(2))]

The reaction of methylhydrazine with dimethylchlorophosphine in the presence of triethylamine affords the new triphosphine (Me(2)P)(2)N-N(Me)(PMe(2)) 1 in near quantitative yields, which represents a bridge between phosphinoamine [>P-N(R)-P<] and phosphanyl hydrazide [>P-N(R)-N(R)-P<] backbones; reaction of 1 with cis-[W(CO)(4)(NHC5H10)(2)] proceeds via two coordination modes to give M-P-N-P and M-P-N-N-P metallacyclic frameworks; the structure of the phosphinoamine coordinated part of 1 has been demonstrated by X-ray crystallographic investigation of 2.