Using the Demko-Sharpless' method, a very effective method for tetrazole compound, a ion! complex has been synthesized and structurally characterized, which was obtained under open system and mild condition by in-situ ligand reaction. The complex [Fe(2-PTZ) 2(H 2O 2] (1) crystallized in monoclinic, space group P2 1/c with a=0.810 4(2) nm, b =1.288 0(3) nm, c=0.733 13(18) nm, "=95.974(5)° 0, A =0.761 1(3) nm 3, B=2, and formed a 3D supramolecular networks through intermolecular hy...