Research Article: Ethyl­enediammonium bis­(5-methyl-3-oxo-2-phenyl-2,3-dihydro­pyrazol-1-ide): a hydrogen-bond-supported supra­molecular ionic assembly

Date Published: September 01, 2008

Publisher: International Union of Crystallography

Author(s): Ruibo Xu, Xingyou Xu, Daqi Wang, Xujie Yang, Xin Wang.


The title compound, C2H10N22+·2C10H9N2O−, is composed of deprotonated 5-methyl-2-phenyl-1H-pyrazol-3(2H)-one anions (PMP−) and protonated ethyl­enediamine cations (H2en2+). The ethyl­enediammonium ion is located on a crystallographic inversion center. The dihedral angle between the phenyl and pyrazole rings is 39.73 (8)°. The two components are connected through N—H⋯O and N—H⋯N hydrogen bonds, forming an infinite three-dimensional network.

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For related literature on pyrazolones, see: Cerchiaro et al. (2006 ▶). For conductivity data for ionic electrolytes, see: Kwak et al. (2004 ▶); Allmann et al. (1990 ▶). For background information on hydrogen bonds and their importance and applications, see: Fu et al. (2004 ▶); Hernández-Galindo et al. (2007 ▶); Hu et al. (2004 ▶); Li & Wang (2007 ▶); Peng et al. (2005 ▶); Yang et al. (2002 ▶, 2005 ▶, 2006 ▶); Zhou et al. (2006 ▶).