ammonia in acetone under Ar; bubbling of NH3 through an acetone solution of teh Pt complex at 25°C; filtration, washing with acetone, drying, NMR anal.;

potassium tert-butylate in tetrahydrofuran 60°C, overnight, under N2; THF evapd. in vac., the residue extd. with toluene, filtered, the soln.evapd. in vac., the residue pumped in vac. at 65°C, the residue dissolved in heptane and filtered, pptn. by cooling to -20°C, thecrystals dried in vac.; elem. anal.;