title: Bis[1-(isopropyl-ideneamino)guanidinium] bis-(3-nitro-benzoate) monohydrate.
abstract: The asymmetric unit of the title salt hydrate, 2C(4)H(11)N(4) (+)·2C(7)H(4)NO(4) (-)·H(2)O, comprises two independent 1-(isopropyl-ideneamino)guanidinium cations, two independent 3-nitro-benzoate anions and a water mol-ecule of crystallization. There are minimal geometric differences between the two planar [maximum deviations 0.061 (2) and 0.088 (2) Å] cations, and between the two almost planar anions [C-C-C-O and C-C-N-O torsion angles of 0.3 (3) and 11.1 (4) °, respectively in the first anion and -173.7 (2) and -0.1 (4), respectively in the second anion]. Extensive O-H⋯O and N-H⋯O hydrogen bonding between all components of the structure leads to the formation of a two-dimensional array with an undulating topology in the bc plane.
authors.forename: Janet M S
authors.initials: JM
authors.lastname: Skakle
authors.forename: Edward R T
authors.initials: ER
authors.lastname: Tiekink
authors.forename: James L
authors.initials: JL
authors.lastname: Wardell
authors.forename: Solange M S V
authors.initials: SM
authors.lastname: Wardell