in dichloromethane; water (N2); soln. of KBr (10 equiv.) in H2O was added to soln. of Au complex (1 equiv.) in CH2Cl2; mixt. was stirred for 3 h; aq. phase septd.; extd. (CH2Cl2); combined org. phases washed (H2O); dried (MgSO4); concd. (vac.); pentane added; filtered; dried (vac.); recrystd. (CH2Cl2/pentane); elem. anal.;

1: tetrahydrofuran 2: water View Scheme

in neat (no solvent, solid phase) Kinetics; byproducts: bromine; Irradiation (UV/VIS); solid-state photolysis with λ>300 nm at 10°C for 2.5 h; detected by NMR spectra;

in dichloromethane byproducts: [N(PPh3)2]ClO4; molar ratio Au2-dppm complex:AuBr2(1-) complex=1:2, stirring (room temp., 3 h); concn., pptn. on Et2O addn.;

in ethanol; dichloromethane an ethanol soln. of (NEt4)(AuBr2) was added to a CH2Cl2 soln. of ligand under N2 and stirred for 15 min; soln. was then concd., n-pentane was added, ppt. was filtered off, washed with water, dried in vac. over P2O5 at 100°C for 1 d; elem.anal.;

in not given treatment of Au-complex with 4-5 equiv. of LiBr, then addn. of equimolaramt. of ligand; elem. anal.;

in not given equimolar amts., room temp.;