A structural and n.m.r. investigation of chlorodinitrosyl bis(triphenyl phosphine) osmium(1+) tetrafluoroborate, [OsCl(NO)2(PPh3)2]BF4 |
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| Authors: | D Michael P Mingos Darren J Sherman Simon G Bott |
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| Institution: | (1) Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, OX1 3QR Oxford, UK |
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| Abstract: | Summary OsCl(NO)2(PPh3)2]BF4 has been synthesised from OsCl(CO)(NO)(PPh3)2] and NOBF4 and characterised in the solid state by a single crystal x-ray analysis determination and in solution by31P{1H} and15N n.m.r. studies. The nitrosyl ligands in OsCl(NO)2(PPh3)2]+ are approximately linear,
and 170(1)0, and the co-ordination geometry about the metal ion is close to trigonal bipyramidal. This contrasts with the occurrence of a linear and a bent nitrosyl ligand in RuCl(NO)2(PPh3)2]+ and a square-pyramidal metal geometry. In solution the15N n.m.r. spectrum of a 50%15N enriched sample of OsCl(NO)2(PPh3)2]+ shows an equilibrium isotope effect similar to that reported for RuCl(NO)2(PPh3)2]+ and suggests that both complexes exist in solution as rapidly equilibrating isomeric forms. |
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