title: Piperazine-1,4-diium naphthalene-1,5-disulfonate.
abstract: The title molecular salt, C(4)H(12)N(2) (2+)·C(10)H(6)O(6)S(2) (2-), consists of a piperazinium cation and a 1,5-naphthalene-disulfonate anion. Crystallographic inversion centers are situated at the center of the ring of the dication as well as at the midpoint of the central carbon-carbon bond in the dianion. In the crystal, inter-molecular N-H⋯O hydrogen bonds link the cations and anions.
authors: Ordered Matter Science Research Center, Southeast University, Nanjing 211189,  People's Republic of China.
authors: Bin
authors: B
authors: Wei