Synthesis of complexes with molybdenum-platinum bonds from the alkylidyne(carborane)molybdenum reagent [NEt 4][Mo(CC 6H 4Me-4)(CO) 2(η 5-C 2B 9H 9Me 2)

Abstract

Treatment of [ trans-PtH(Cl)(PEt 3) 2], in tetrahydrofuran at −30 °C, with [NEt 4][Mo(CC 6H 4Me-4)(CO) 2(η 5-C 2B 9H 9Me 2)], in the presence of TlBF 4, affords the thermally labile complex [MoPt(CO) 2(PEt 3) 2{η 6-C 2B 8H 9(CH 2C 6H 4Me-4)Me 2}]. Addition of donor molecules L [CO, PEt 3 or dppm (Ph 2PCH 2PPh 2)] to the latter at low temperatures yields the stable compounds [MoPt(μH){μ-σ:η 5-C 2B 9H 7(CH 2C 6H 4Me-4)Me 2}(CO) 2(L)(PEt 3) 2]. The reaction between [ cis-PtCl(Me)(PMe 2Ph) 2] and [NEt 4][Mo(CC 6H 4Me-4)(CO) 2(η 5-C 2B 9H 9Me 2)] in tetrahydrofuran, in the presence of TlBF 4, gives a mixture of the dimetal compounds [MoPt(μ-CC 6H 4Me-4)(μ-σ:η 5-C 2B 9H 8Me 2)(PMe 2Ph)] and [MoPt(μ-CC 6H 4 Me-4)(μ-σ:η 5-C 2B 9H 8Me 2)(CO) 2(PMe 2Ph) 2], from which the latter may be isolated pure by addition of PMe 2Ph. The NMR spectra ( 1H, 13C{ 1H}, 11B{ 1H} and 31P{ 1H}) of the new complexes are reported and discussed in relation to the structures proposed.