title: A new polymorph of 5,5'-(ethane-1,2-di-yl)bis-(1H-tetra-zole).
abstract: The asymmetric unit of the title compound, C(4)H(6)N(8), contains a quarter of the mol-ecule, which possesses a crystallographically imposed centre of symmetry with all non-H atoms situated on a mirror plane. The crystal packing exhibits inter-molecular N-H⋯N hydrogen bonds and π-π stacking inter-actions between the tetra-zole rings of adjacent mol-ecules [centroid-centroid distance = 3.4402 (10) Å].
authors.forename: Cheng-Fang
authors.initials: CF
authors.lastname: Qiao
authors.forename: Chun-Sheng
authors.initials: CS
authors.lastname: Zhou
authors.forename: Qing
authors.initials: Q
authors.lastname: Wei
authors.forename: Zheng-Qiang
authors.initials: ZQ
authors.lastname: Xia