920753.fig.001
Figure 1: Molecular structures of 1, 2, and L (1): dinickel bishydrazine ter[(1H-Tetrazol-3-yl)methan-3yl]-1H-tetrazole, (2): dinickel tetraazide ter[(1H-Tetrazol-3-yl)methan-3yl]-1H-tetrazolate, and (L): tetra(1H-Tetrazol-5-yl)methane.