newburyport mass in chloroform 50 ml methanol 30 ml was added and the mixture was stirred for several hours and allowed to come to room temperature water was added and the product extracted with chloroform methylene chloride dried mgso 4 filtered and the solvent was removed in vacuo the residue was slurried with chloroform diluted with ethanol and the precipitate collected and dried to give 1 75 g 70 of product melting point m p 173 u00b0 177 u00b0 chloroauric acid tetrahydrate 2 5 g 6 06 mmole in water 20 ml was reduced upon addition of thiodiglycol 3 0 g 24 6 mmole in water 20 ml methanol 60 ml at 0 u00b0 a solution of tris diphenylphosphinoethyl phosphine 1 02 g 1 5 mmole a formula iia compound obtained from strem chemicals inc newburyport mass in chloroform 30 ml methanol 20 ml was added and the mixture was stirred for several hours water 200 ml was added and the mixture was extracted with chdloroform the chloroform extracts were dried mgso 4 filtered and the solvent was removed in vacuo methanol was added to the residue and the solution was cooled the crystals were collected dissolved in methylene chloride and treated with activated carbon then methanol was added and the mixture was cooled the resulting crystals were collected.