Wecharine Intissar, Valkonen Arto, Rzaigui Mohamed, Smirani Sta Wajda
Laboratoire de chimie des Matériaux, Faculté des Sciences de Bizerte, Université de Carthage, 7021 Zarzouna Bizerte, Tunisia.
Department of Chemistry and Bioengineering, Tampere University of Technology, PO Box 541, 33101 Tampere, Finland.
Acta Crystallogr E Crystallogr Commun. 2015 Feb 21;71(Pt 3):o193-4. doi: 10.1107/S2056989015003102. eCollection 2015 Mar 1.
In the title salt, C5H14N2 (2+)·2C4H3O4 (-), the asymmetric unit contains two independent 2-methyl-piperazinium dications, which comprise a racemic pair, and four hydrogen maleate monoanions. In the roughly planar hydrogen maleate anions, intra-molecular O-H⋯O hydrogen bonds generate S(7) rings. In the crystal, the four independent anions are linked to the 2-methyl-piperazinium cations through N-H⋯O hydrogen bonds, forming two-dimensional layered structures lying parallel to (001).
在标题盐C₅H₁₄N₂(2+)·2C₄H₃O₄(-)中，不对称单元包含两个独立的2-甲基哌嗪二价阳离子（构成一对外消旋体）和四个马来酸氢单阴离子。在大致呈平面状的马来酸氢阴离子中，分子内O-H⋯O氢键形成S(7)环。在晶体中，四个独立的阴离子通过N-H⋯O氢键与2-甲基哌嗪阳离子相连，形成平行于(001)的二维层状结构。
