hydrogen in acetonitrile byproducts: (C6H5)3PO; under H2; in the presence of poly(N-vinylpyrrolidone) at 40°C and3 bar, even at room temp. and 5 bar, or at -55°C; washed with diethyl ether; Au nanoparticles, detn. by NMR, TEM;

in acetonitrile byproducts: (C6H5)3PO; soln. refluxed under Ar in the presence of poly(N-vinylpyrrolidone) for 2 h; Au nanoparticles; detn. by UV and 31P NMR;

in acetonitrile in the presence of poly(N-vinylpyrrolidone) at -55°C; Au nanoparticles; detn. by NMR;