title: N-(2,4-Dimethoxybenzylideneamino)guanidinium dihydrogenphosphate.
abstract: In the asymmetric unit of the title compound, C10H15N4O2+.H2PO4-, there are two protonated aminoguanidinium cations and two dihydrogenphosphate anions. The positive charge on the protonated amidine group is delocalized over the three C-N bonds in a manner similar to that found in guanidinium salts. The aminoguanidinium cations are found to be the E-isomer structures. Intramolecular interactions of the N-H...N type are observed, leading to the formation of five-membered rings. Extensive networks of O-H...O, N-H...O and C-H...O hydrogen bonds stabilize the three-dimensional network. In the crystal structure, pi-pi interactions between the benzene rings, with a distance of 3.778 (2) angstroms between the ring centroids, also affect the packing of the molecules.
authors.affiliation: Department of Physics, Arts and Sciences Faculty, Ondokuz Mayis University, 55139 Samsun, Turkey.
authors.forename: Muharrem
authors.initials: M
authors.lastname: Dinçer
authors.forename: Namik
authors.initials: N
authors.lastname: Ozdemir
authors.forename: Emin
authors.initials: E
authors.lastname: Saripinar
authors.forename: Lalehan
authors.initials: L
authors.lastname: Kulak
authors.forename: Orhan
authors.initials: O
authors.lastname: Büyükgüngör