Research Article: Tramadolium picrate

Date Published: March 01, 2012

Publisher: International Union of Crystallography

Author(s): B. P. Siddaraju, Grzegorz Dutkiewicz, H. S. Yathirajan, Maciej Kubicki.


In the title salt {systematic name: [2-hy­droxy-3-(3-meth­oxy­phen­yl)cyclo­hexyl­meth­yl]dimethyl­aza­nium 2,4,6-trinitro­phenol­ate}, C16H26NO2+·C6H2N3O7−, the cation is protonated at the N atom. The cyclo­hexane ring adopts a chair conformation with the hy­droxy substituent in an axial position. In the crystal, O—H⋯O and N—H⋯O hydrogen bonds link the cations and anions into supra­molecular chains along [100].

Partial Text

For general background to tramadol, see: Scott & Perry (2000 ▶). For related tramadolium crystal structures, see: Bica et al. (2010 ▶); Siddaraju et al. (2011 ▶). For asymmetry parameters, see: Duax & Norton (1975 ▶). For the Cambridge Structural Database, see: Allen (2002 ▶).