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Crystal structure of 2-methylpiperazine-1,4-diium bis(hydrogen maleate)

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Original languageEnglish
Pages (from-to)o193-o194
JournalActa Crystallographica Section E : Structure Reports Online
Issue number3
Publication statusPublished - 1 Mar 2015
Publication typeA1 Journal article-refereed


In the title salt, C<inf>5</inf>H<inf>14</inf>N<inf>2</inf><sup>2+</sup>·2C<inf>4</inf>H<inf>3</inf>O<inf>4</inf><sup>-</sup>, the asymmetric unit contains two independent 2-methylpiperazinium dications, which comprise a racemic pair, and four hydrogen maleate monoanions. In the roughly planar hydrogen maleate anions, intramolecular O - H⋯O hydrogen bonds generate S(7) rings. In the crystal, the four independent anions are linked to the 2-methylpiperazinium cations through N - H⋯O hydrogen bonds, forming two-dimensional layered structures lying parallel to (001).


  • 2-methylpiperazine-1,4-diium, Crystal structure, Hydrogen bonding, Hydrogen maleate

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Field of science, Statistics Finland