hydrogenchloride dild. HCl;

ammonia in ethanol boiling temp.;

in water (N2); Schlenk techniques; exclusion of light; Ag2O added to boiling aq. soln. of succinimide; refluxed for 45 min; filtered; crystd. at room temp. overnight; filtered; vac. dried at 110°C for 1 h;

in acetonitrile excess of Ag, N2 atm., 24°C;