5-(Pyridinium-3-yl)tetra­zol-1-ide hexa­aqua­magnesium dichloride

In the title compound, (C(6)H(5)N(5))(2)[Mg(H(2)O)(6)]Cl(2), the asymmetric unit contains one zwitterionic 5-(pyridinium-3-yl)tetra­zol-1-ide mol­ecule, one half of an [Mg(H(2)O)(6)](2+) cation ([Image: see text] symmetry) and one chloride ion. The Mg(II) ion is surrounded by six water mol­ecules, with their O atoms located at the apices, exhibiting a slightly distorted octa­hedral coordination. Mg—O bond lengths range from 2.0526 (14) to 2.0965 (16) Å [mean value = 2.068 Å]. The pyridine and tetra­zole rings are nearly coplanar and only twisted from each other by a dihedral angle of 5.68 (1)°. The zwitterionic organic mol­ecules, anions and cations are connected by O—H⋯Cl, O—H⋯N and N—H⋯Cl hydrogen bonds, leading to the formation of a three-dimensional network.