Bis[(4-cyano­benz­yl)ammonium] bis­(perchlorate) monohydrate

The asymmetric unit of the title compound, 2C(8)H(9)N(2) (+)·2ClO(4) (−)·H(2)O, consists of two (4-cyano­benz­yl)>ammonium cations, two disordered ClO(4) (−) anions and one water mol­ecule. The differences in the two cations are reflected in the N—C—C—C torsion angles [−94.7 (3) and −115.9 (3)°]. In addition, the cations show different hydrogen-bonding patterns as one N atom bonds to two O atoms of ClO(4) (−) ions, while the other N atom is involved in hydrogen bonding with the O atoms of the ClO(4) (−) ions and water mol­ecules. In the crystal, N—H⋯O and O—H⋯O hydrogen bonds result in a three-dimensional network. An O atom in each of the anions is disordered over two positions of equal occupancy.