440636-44-2Relevant articles and documents
Synthesis and study of cationic, two-coordinate triphenylphosphine- gold-π complexes
Brooner, Rachel E. M.,Brown, Timothy J.,Widenhoefer, Ross A.
supporting information, p. 8276 - 8284 (2013/07/27)
Cationic, two-coordinate triphenylphosphine-gold(I)-π complexes of the form [(PPh3)Au(π ligand)]+ SbF6- (π ligand=4-methylstyrene, 1×SbF6), 2-methyl-2-butene (3×SbF6), 3-hexyne (6×SbF6), 1,3-cyclohexadiene (7×SbF6), 3-methyl-1,2-butadiene (8×SbF6), and 1,7-diphenyl-3,4-heptadiene (10×SbF 6) were generated in situ from reaction of [(PPh3)AuCl], AgSbF6, and π ligand at -78°C and were characterized by low-temperature, multinuclear NMR spectroscopy without isolation. The π ligands of these complexes were both weakly bound and kinetically labile and underwent facile intermolecular exchange with free ligand (ΔG ≠≈9 kcal mol-1 in the case of 6×SbF 6) and competitive displacement by weak σ donors, such as trifluoromethane sulfonate. Triphenylphosphine-gold(I)-π complexes were thermally unstable and decomposed above -20°C to form the bis(triphenylphosphine) gold cation [(PPh3)2Au] +SbF6- (2×SbF6). Golden family: A family of cationic, two-coordinate gold complexes of the form [(PPh3)Au(π ligand)]+SbF6- were generated in situ and characterized by low-temperature NMR spectroscopy (see scheme). The π ligands of these complexes underwent facile intermolecular exchange with free ligand (ΔG≠≈9 kcal mol-1) and competitive displacement by weak σ donors. Copyright
