New homoleptic metal carbonyl cations: the syntheses, vibrational and13C MAS NMR spectra of hexacarbonyl-ruthenium( II ) and-osmium( II ) undecafluorodiantimonate( V ), [Ru(CO)6][Sb2F11]2and [Os(CO)6][Sb2F11]2

The new homoleptic carbonyl cations [Ru(CO)6]2+ and [Os(CO)6]2+ are obtained as [Sb2F11]– salts by the reductive carbonylation of M(SO3F)3(M = Ru, Os), under very mild conditions (60–90 °C, 1 atm CO), in liquid SbF5 in a simple, one-step procedure, and are characterized by FT Raman, FTIR and 13C MAS NMR spectroscopy.