Organic Polymer Chemistry Research Laboratory, College of Ch emistry, Isfahan University of Technology, Isfahan 84156, IranReceived December 2, 2003Key Words : Calcium hypochlorite, Urazoles, Bis-urazoles, Triazolinediones4-Substituted-1,2,4-triazole-3,5-diones (TAD s) are notablefor their ability to participate in a wide range of reactivityand reaction types, e.g. [4+2]