Synthesis of the eta-1-Phosphaallene Complexes [(eta5-C5H5)(CO)(NO)W{eta2-R~1p=C=C(R2)H}](R1 =tBu,Cy; R2 =Ph,H)from [(eta5-C5H5)(CO)(NO)-W=C=C(R2)H](R2 =Ph,H)and Inversely Polarized Phosphaalkenes R1P=C(NMe2)2 (R1 =tBu,Cy),and Their Structure

摘要

The reaction of the vinylidene complex [(eta5-C5H5)(CO)(NO)-W=C=C(H)Ph](9)with the phosphaalkenes RP=C(NMe2)2 (la:R =tBu; 1c:R =c-C6H_(11))affords the novel eta-1-phos-phaallene complexes [eta2-jRP=C=C(H)Ph}W(CO)(NO)(eta5-C5H5)](14:R=tBu; 15:R =c-C6H_(11))in addition to the car-bene complex [(eta5-C5H5)(CO)(NO)W=C(NMe2)C(Ph)=C(H)-NMe2](16).Similarly,treatment of [(eta5-C5Hs)(CO)(NO)-W=C=CH2](12)with the phosphaalkenes gives rise to the formation of [eta2-{RP=C=CH2}W(CO)(NO)(eta5-C5H5)](17:R =tBu; 18:R =c-C6H_(11)).The novel compounds 14,15,17,and 18 were characterized by elemental analysis and by spectroscopy (IR,1H,13C NMR,MS).Moreover,the molecular structures of 14 and 16 were determined by X-ray diffraction analyses.