Research Article: 5-Carb­oxy-2-isopropyl-1H-imidazol-3-ium-4-carboxyl­ate monohydrate

Date Published: July 01, 2011

Publisher: International Union of Crystallography

Author(s): Chao-Jun Du, Zheng-Hai Shi, Li-Sheng Wang, Chao-Ling Du.


In the title compound, C8H10N2O4·H2O, the imidazole N atom is protonated and one of the carboxyl­ate groups is deprotoned, forming a zwitterion. An intra­molecular O—H⋯O hydrogen bond occurs. The crystal structure is stabilized by inter­molecular N—H⋯O and O—H⋯O hydrogen bonds. In addition, inter­molecular N—H⋯O and O—H⋯O hydrogen bonds link the mol­ecules into two-dimensional networks parallel to (10).

Partial Text

For the use of related imidazole­dicarb­oxy­lic acid structures in coordination chemistry, see: Sun et al. (2006 ▶); Merchan & Stoeckli-Evans (2007 ▶); Guo (2009 ▶); Wang & Qin (2010 ▶); Wang et al. (2010 ▶); Feng et al. (2010 ▶); Li et al. (2010 ▶). For the synthesis of the title compound, see: Alcalde et al. (1992 ▶).




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