Research Article: Dimethyl­ammonium 3-carb­oxy­benzoate

Date Published: June 01, 2012

Publisher: International Union of Crystallography

Author(s): Tausif Siddiqui, Vandavasi Koteswara Rao, Matthias Zeller, Sherri R. Lovelace-Cameron.


The asymmetric unit of the title organic salt, C2H8N+·C8H5O4−, consists of two dimethyl­ammonium cations and two 3-carb­oxy­benzoate anions. The 3-carb­oxy­benzoate anions are linked via strong inter­molecular and nearly symmetrical O—H⋯O hydrogen bonds forming infinite chains parallel to [111]. Neighbouring chains are further connected by the dimethyl­ammonium cations via N—H⋯O bonds, resulting in a double-chain-like structure. The dihedral angles of all carboxylate groups with respect to the phenylene rings are in the range 7.9 (1)–20.48 (9)°.

Partial Text

For supra­molecular structures comprising 3-carb­oxy­benzo­ates, see: Guo et al. (2010 ▶); Liu et al. (2007 ▶); Weyna et al. (2009 ▶). For similar chain-like structures, see: Ballabh et al. (2005 ▶). For hydrolysis of formamides, see: Cottineau et al. (2011 ▶); Hine et al. (1981 ▶). For a description of the Cambridge Structural Database, see: Allen (2002 ▶). For hydrogen bonding, see: Gilli & Gilli (2009 ▶).




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