LAUSR

Abstract 1-(1,2,4-Triazol-3-yl)-1H-tetrazole (trt) and 1-(1-tert-butyl-1,2,4-triazol-3-yl)-1H-tetrazole (btrt) were synthesized by heterocyclization of corresponding amines with triethyl orthoformate and sodium azide. The interaction of trt with copper(II) chloride in ethanol in the presence of hydrochloric acid was found to result in 1D coordination polymer [CuCl2(trt)(H2O)]n·nH2O. N-tert-butylated ligand btrt reacts with the copper salt in ethanol giving 2D coordination polymer [CuCl2(btrt)]n. Tetrazole ring-opening reaction with the formation of [CuCl2(3-amino-1,2,4-triazolium)2][CuCl4]·2H2O was observed in the interaction of trt with copper(II) chloride in aqueous hydrochloric acid. The temperature-dependent magnetic susceptibility measurements of [CuCl2(btrt)]n revealed that the copper(II) ions were weakly ferromagnetically coupled showing a coupling constant J of 1.2 cm−1.