Citation: Xian-He Bu; He Liu; Miao Du; Lei Zhang; Ya-Mei Guo; Mitsuhiko Shionoya; Joan Ribas (2002). New Mononuclear, Cyclic Tetranuclear, and 1-D Helical-Chain Cu(II) Complexes Formed by Metal-Assisted Hydrolysis of 3,6-Di-2-pyridyl-1,2,4,5-tetrazine (DPTZ): Crystal Structures and Magnetic Properties. Inorganic Chemistry, 41, pp. 1855-1861.