sodium in ammonia Irradiation (UV/VIS); (CH3)3SnCl was dissolved in ammonia, Na metal was added until a blue color persisted for 5 min, when the blue color dissapeared, phosphate esterwas added, the mixt. was UV-irradiated with stirring for 5 h; excess of CH3I was added, NH3 was evapd., the residue was treated with water, extd. with ether, washed with aq. satd. soln. of NaCl, dried over MgSO4, recrystd. in ethanol;