The title compound, C4H8N3O+·ClO4
−, is built up from creatininium cations and perchlorate anions. Crystal cohesion and perchlorate stability are ensured by N—H⋯O hydrogen bonds that together with weak C—H⋯O interactions build up a three-dimensional network.
Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.003 Å; R factor = 0.030; wR factor = 0.099; data-to-parameter ratio = 18.5.In the title compound, C 6 H 8 NO + ÁHSO 4 À , there is an intricate cation-cation, cation-anion and anion-anion three-dimensional hydrogen-bond network. Refinement R[F 2 > 2(F 2 )] = 0.030 wR(F 2 ) = 0.099 S = 1.14 2241 reflections 121 parameters 1 restraint H-atom parameters constrained Á max = 0.32 e Å À3 Á min = À0.45 e Å À3 Absolute structure: Flack (1983), with 1095 Friedel pairs Flack parameter: À0.02 (8) organic compounds
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