title: 3-Amino-1-methyl-pyrazin-1-ium iodide.
abstract: In the cation of the title compound, C(5)H(8)N(3) (+)·I(-), the C-N(H(2)) bond distance [1.338 (8) Å] is at the lower end of the range for aryl amines. In the crystal structure, cations and anions are linked via N-H⋯I hydrogen bonds, forming centrosymmetric four-component clusters.
authors.forename: Daniel
authors.initials: D
authors.lastname: Foucher
authors.forename: Stephen
authors.initials: S
authors.lastname: Wylie
authors.forename: Donal H
authors.initials: DH
authors.lastname: Macartney
authors.forename: Alan J
authors.initials: AJ
authors.lastname: Lough