16569-58-7Relevant academic research and scientific papers
Late transition metal oxo and imido complexes. II. Gold(I) oxo complexes
Yang, Yi,Ramamoorthy, Visalakshi,Sharp, Paul R.
, p. 1946 - 1950 (2008/10/08)
The gold(I) oxo complexes [(LAu)3(μ3-O)] BF4 (1) have been prepared for L = PMePh2, PMe2Ph, PEtPh2, PPriPh2, P(p-ClPh)3, P(o-tol)3, P(OEt)Ph2, and P(OMe)3. Two of these new oxo complexes, as well as a new crystal form of [(PPh3Au)3(μ3-O)]BF4, were structurally characterized. Crystals of [(PMePh2Au)3(μ3-O)]BF 4·CH2Cl2 from CH2Cl2/ether are monoclinic (P21/c) with a= 11.395(2) A?, b = 25.901(2) A?, c = 16.024(3) A?, β = 110.615(8)°, and Z = 4. Crystals of [(PPh3Au)3(μ3-O)]BF 4·1.5CH2Cl2 from CH2Cl2/ether are monoclinic (P21/c) with a = 14.723(3) A?, b = 14.808(3) A?, c = 25.999(3) A?, β = 104.06(3)°, and Z = 4. Crystals of [(P(O-tol)3Au)3(μ3-O)]BF 4·xC6H14·0.5H2O from CH2Cl2/hexane are monoclinic (P21/a) with a = 14.2611(45) A?, b = 27.4668(71) A?, c = 23.0907(81) A?, β = 91.37(2)°, and Z = 4. The PPh3 and the PMePh2 structures consist of inversion-related edge-bridged [(LAu)3O]+ dimers held together by Au-Au interactions. The P(o-tol)3 structure consists of isolated [(LAu)3O]+ units. New oxo complexes are also formed in equilibrium mixtures of [((PPh3)Au)3(μ3-O)]BF4 and LAuCl. Oxygen-17 NMR data for 1 show chemical shifts of +19.7 to -36.0 ppm (H2O reference) with upfield shifts corresponding to increasing basicity of the phosphine, L.
