Corrigendum: An Improved Synthesis of Bromotetrazole

Abstract

In the Results and Discussion section under synthesis, "A solution of sodium nitrite doped with copper sulfate pentahydrate was slowly added to a solution of 5-aminotetrazole and copper sulfate pentahydrate" is incorrect and should read, "A solution of sodium nitrite doped with copper sulfate pentahydrate was slowly added to an acidic solution of 5-aminotetrazole, potassium bromide, and copper sulfate pentahydrate."In the Experimental section, the synthesis of 5-bromotetrazole (1), "A solution of 5.25g (0.0761 mol) NaNO 2 , 0.3 g (1.2 mmol) CuSO 4 pentahydrate, and 90 mL water was added to a solution at 5-10°C of 6.38 g (0.0748 mol) 5-amino-1H-tetrazole, 9 mL 70% HNO 3 , 6.75g (0.0270 mol) CuSO 4 pentahydrate over 1 hour with stirring" is incorrect and should read, "A solution of 5.25 g (0.0761 mol) NaNO 2 , 0.3 g (1.2 mmol) CuSO 4 pentahydrate, and 90 mL water was added to a solution at 5-10oC of 6.38 g (0.0748 mol) 5-amino-1H-tetrazole, 9 mL 70% HNO 3 , 57 g (0.479 mol) KBr, 6.75 g (0.0270 mol) CuSO 4 pentahydrate over 1 hour with stirring."