132854-47-8Relevant articles and documents
Synthesis and reactivity of carbonylbis(triphenylphosphine)rhodium(I) complexes of water and weakly coordinating anions
Branan, Daniel M.,Hoffman, Norris W.,McElroy, E. Andrew,Prokopuk, Nicholas,Salazar, Anna B.,Robbins, Martha J.,Hill,Webb, Thomas R.
, p. 1200 - 1207 (2008/10/08)
New complexes trans-Rh(PPh3)2(CO)OPOF2 and [trans-Rh(PPh3)2(CO)(OH2)]Z·nH 2O (Z = SO3CF3, n = 1; Z = BF4, n = 2; Z = ClO4, n = 2) were prepared and characterized. Syntheses of the four species entailed metathesis of the Rh(I) chloride with AgPF6, AgSO3CF3, AgBF4, and AgClO4, respectively, in undried solvents. The water-free OPOF2 complex arises from hydrolysis of a spectroscopically detected Rh(I) PF6- species. Metathesis studies with [N(PPh3)2]+ salts and reactions with pyridine and CO showed the affinity of [Rh(PPh3)2(CO)]+ in CH2Cl2 for ligands L to follow the trend L = (O2CCF3)- > (ONO2)- > pyridine > (OPOF2)- ? H2O ? (SO3CF3)- ≈ (BF4)- ～ (ClO4)-. Monoolefins such as C2H4 and PhCH=CH2 failed to displace the very weakly coordinating ligand H2O from [Rh(PPh3]2(CO)(OH2)]SO3CF 3·H2O in CH2Cl2. The crystal structure of [Rh(PPh3)2-(CO)(OH2)][BF 4]·1/2H2O·1/4C6H12 has been determined. The crystal belongs to the triclinic crystal system, space group P1, with lattice constants a = 11.865 (2) A?, b - 17.235 (6) A?, c = 18.590 (5) A?, α = 91.95 (2)°, β = 101.62 (2)°, γ = 101.83 (2)°, and Z = 4.
