suspension was stirred for 3 5 hours then the solid was collected washed with water and dried giving 8 74 g of cis 1 2 cyclohexanediamine compound with platinum chloride a suspension of 1 8 g of the above platinum derivative 1 65 g of 2 2 39 oxybisacetic acid disilver salt and 200 ml of water was stirred in the dark overnight and then filtered the filtrate was evaporated to dryness the residue slurried in methanol diluted with ether and filtered giving 981 mg of the desired product mp 220 u00b0 c dec a suspension of 1 2 g of cisplatin 1 39 g of 2 2 39 oxybisacetic acid disilver salt and 100 ml of water was stirred overnight in the dark and then filtered the filtrate was evaporated to dryness giving 1 29 g of the desired product mp 190 u00b0 c dec a mixture of 43 19 g of 1 4 dibromobutane 13 2 g of malononitrile 55 3 g of potassium carbonate and 1 liter of acetonitrile was refluxed for 42 hours filtered while hot and evaporated to dryness giving a dark oil this oil was vacuum distilled giving 12 8 g 1 1 cyclopentanedicarbonitrile a 12 0 g portion of the above compound in 150 ml of tetrahydrofuran was treated dropwise with 300 ml of 1n borane in tetrahydrofuran over 1 hour the mixture was then stirred for 0 5 hour refluxed for 5 hours cooled to room temperature and treated dropwise with 50 ml methanol the mixture was stirred overnight then cooled to 10 u00b0 c and dry hydrogen chloride gas bubbled in until the ph reached 2 0 the mixture was then refluxed for.