Title Green chemistry: ZrOCl2 8H2O catalyzed regioselective synthesis of 5-amino-1-aryl-1H-tetrazoles from secondary arylcyanamides in water Type JournalPaper Keywords Not Registered! Abstract Not Registered! Researchers (Fourth Researcher), (Third Researcher), (Second Researcher), Bagher Eftekhari-Sis (Third Researcher)