45154-29-8Relevant academic research and scientific papers
Synthesis, structural characterization, and antiinflammatory activity of triethylphosphinegold(I) sulfanylpropenoates of the type [(AuPEt 3)2xspa] [H2xspa = 3-(aryl)-2-sulfanylpropenoic acid]: An (H2O)6
Barreiro, Elena,Casas, Jose S.,Couce, Maria D.,Gato, Angeles,Sanchez, Agustin,Sordo, Jose,Varela, Jose M.,Lopez, Ezequiel M. Vazquez
, p. 6262 - 6272 (2009/02/03)
Gold complexes of the type [(AuPEt3)2xspa] were prepared by reacting AuPEt3Cl in basic media with the 3-(aryl)-2-sulfanylpropenoic acids H2xspa [x = p, Clp, -o-mp, -p-mp, -o-hp, -p-hp, diBr-o-hp, f, t, -o-py; p
Ligand-scrambling reactions of cyano(trialkyl/triarylphosphine)gold(I) complexes: Examination of factors influencing the equilibrium constant
Hormann-Arendt, Anne L.,Frank Shaw III
, p. 4683 - 4687 (2008/10/08)
The ligand-scrambling reaction of R3PAuCN (to form (R3P)2Au+ and Au(CN)2-) has been studied for R = Ph, Me, Et, i-Pr, and Cy (Cy = cyclo-C6H11).1 The reactions are conveniently studied by 31P and 13C NMR spectroscopy. The phenyl complex undergoes rapid ligand exchange and must be cooled to approximately 240 K to observe sharp resonances for the individual equilibrium components. All of the aliphatic complexes are in the slow exchange limit allowing observation by NMR spectroscopy at room temperature. The cyclohexyl complex equilibrated slowly, requiring several days to reach equilibrium, while the other complexes equilibrated within the time required to measure the spectrum. Equilibrium constants (Keq = [(R3P)2Au+][Au-(CN)2 -]/[R3PAuCN]2) were measured by integration of 31P NMR spectra of methanol solutions of the complexes. For the ethyl complex, Keq is dependent on the initial concentration, [Et3PAuCN]0, and the ionic strength of the medium. The concentration dependence is attributed to the ionic strength effect of the reaction products. The effects of the phosphine substituents on Keq were compared at 240 K in 0.25M NH4NO3 methanol solutions. The Keq values (±esd) are as follows: Ph3PAuCN, 0.112 ± 0.005; Me3PAuCN, 0.37 ± 0.05; Et3PAuCN, 0.24 ± 0.02; i-Pr3PAuCN, 0.29 ± 0.03; Cy3PAuCN, 0.49 ± 0.02. A convenient new procedure for preparing AuCN, the precursor of R3PAuCN, from Me2SAuCl was developed. Of the R3PAuCN complexes studied, i-Pr3PAuCN and Cy3PAuCN have not been reported in the literature.
