Bis(tetraethylammonium) oxalate dihydrate

Timothy J Mcneese,Robert D Pike

doi:10.1107/s160053681203022x

Abstract

The title compound, 2C8H20N+·C2O4 2−·2H2O, synthesized by neutralizing H2C2O4·2H2O with (C2H5)4NOH in a 1:2 molar ratio, is a deliquescent solid. The oxalate ion is nonplanar, with a dihedral angle between carboxylate groups of 64.37 (2)°. O—H⋯O hydrogen bonds of moderate strength link the O atoms of the water molecules and the oxalate ions into rings parallel to the c axis. The rings exhibit the graph-set motif R 4 4(12). In addition, there are weak C—H⋯O interactions in the crystal structure.

Highlights

The title compound, 2C8H20N+C2O422H2O, synthesized by neutralizing H2C2O42H2O with (C2H5)4NOH in a 1:2 molar ratio, is a deliquescent solid
H atoms treated by a mixture of independent and constrained refinement max = 0.20 e Å3
Oxalate was confirmed by the blue ring resorcinol test (Chernoff, 1920)

Summary

Data collection

Pikeb a Department of Chemistry, Loyola University Maryland, 4501 North Charles Street, Baltimore, MD 21210-2699, USA, and bDepartment of Chemistry, College of William and Mary, PO Box 8795, Williamsburg, VA 23187-8795, USA. H atoms treated by a mixture of independent and constrained refinement max = 0.20 e Å3. R factor = 0.031; wR factor = 0.081; data-to-parameter ratio = 7.9. The title compound, 2C8H20N+C2O422H2O, synthesized by neutralizing H2C2O42H2O with (C2H5)4NOH in a 1:2 molar ratio, is a deliquescent solid. The oxalate ion is nonplanar, with a dihedral angle between carboxylate groups of 64.37 (2). O—H O hydrogen bonds of moderate strength link the O atoms of the water molecules and the oxalate ions into rings parallel to the c axis. Symmetry codes: (i) x; y 1; z; (ii) x þ 1; y þ 1; z 12; (iii) x þ 1; y þ 2; z 12; (iv) x; y; z 1; (v) x þ 1; y þ 1; z þ 12; (vi) x þ 12; y þ 1; z; (vii) x þ 1; y; z þ 12

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