title: Amino-guanidinium hydrogen fumarate.
abstract: The title compound, CH(7)N(4) (+)·C(4)H(3)O(4) (-), is a molecular salt in which the amino-guanidinium cations and fumarate monoanions are close to planar, with maximum deviations of 0.011 (1) and 0.177 (1) Å, respectively. The crystal packing is stabilized by inter-molecular N-H⋯O and O-H⋯O hydrogen bonds.
authors.forename: Swaminathan
authors.initials: S
authors.lastname: Murugavel
authors.forename: Gnanavelu
authors.initials: G
authors.lastname: Ganesh
authors.forename: Arunachalathevar
authors.initials: A
authors.lastname: Subbiah Pandi
authors.forename: Subbiah
authors.initials: S
authors.lastname: Govindarajan
authors.forename: Rajendran
authors.initials: R
authors.lastname: Selvakumar