Abstract
In the title salt, C5H14N2 2+·2C4H3O4 −, 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).
Highlights
In the title salt, C5H14N22+2C4H3O4, the asymmetric unit contains two independent 2-methylpiperazinium dications, which comprise a racemic pair, and four hydrogen maleate monoanions
The four independent anions are linked to the 2-methylpiperazinium cations through N—H O
Our ongoing studies of novel salts of maleic acid with related substances arises from the fact that hydrogen maleate anions in these systems possess short but highly strained hydrogen bonds in salts with racemic amines (Hajlaoui et al, 2011; Wilkinson & Harrison, 2007)
Summary
C5H14N22+2C4H3O4, the asymmetric unit contains two independent 2-methylpiperazinium dications, which comprise a racemic pair, and four hydrogen maleate monoanions. Agilent SuperNova (single source at offset, Eos) diffractometer Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2013) In the roughly planar hydrogen maleate anions, intramolecular O—H O hydrogen bonds generate S(7)
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