SYNTHESIS OF COMPLEXES WITH MOLYBDENUM PLATINUM BONDS FROM THE ALKYLIDYNE(CARBORANE)MOLYBDENUM REAGENT [NET4][MO(CC6H4ME-4)(CO)2(ETA-5-C2B9H9ME2)]

Treatment of [trans-PtH(Cl)(PEt3)2], in tetrahydrofuran at -30-degrees-C, with [NEt4][Mo(=CC6H4Me-4)(CO)2(eta-5-C2B9H9Me2)], in the presence of TlBF4, affords the thermally labile complex [MoPt(CO)2(PEt3)2{eta-6-C2B9H8(CH2C6H4Me-4)Me2}]. Addition of donor molecules L [CO, PEt3 or dppm (Ph2PCH2PPh2)] to the latter at low temperatures yields the stable compounds [MoPt(mu-H){mu-sigma:eta-5-C2B9H7(CH2C6H4Me-4)Me2}(CO)2(L)(PEt3)2]. The reaction between [cis-PtCl(Me)(PMe2Ph)2] and [NEt4][Mo(=CC6H4Me-4)(CO)2(eta-5-C2B9H9Me2)] in tetrahydrofuran, in the presence of TIBF4, gives a mixture of the dimetal compounds [MoPt(mu-CC6H4Me-4)(mu-sigma:eta-5-C2B9H8Me2)(PMe2Ph)] and [MoPt(mu-CC6H4Me-4)(mu-sigma:eta-5-C2B9H8Me2)(CO)2(PMe2Ph)2], from which the latter may be isolated pure by addition of PMe2Ph. The NMR spectra (H-1, C-13{H-1}, B-11{H-1} and P-31{H-1}) of the new complexes are reported and discussed in relation to the structures proposed.