Research Article: 1,10-Phenanthrolin-1-ium hydrogen d,l-tartrate dihydrate

Date Published: June 01, 2011

Publisher: International Union of Crystallography

Author(s): Sit Foon Cheng, Seik Weng Ng.


In the title hydrated molecular salt, C12H9N2+·C4H5O6−·2H2O, the cation is almost planar (r.m.s. deviation = 0.014 Å); the carbon skeleton of the anion assumes a trans conformation [C—C—C—C torsion angle = −179.86 (14)°]. The carboxyl end of one hydrogen tartrate anion forms a short hydrogen bond to the carboxyl­ate end of another anion [O⋯O = 2.508 (2) Å] in a head-to-tail manner, forming a chain; the chains and water mol­ecules inter­act, generating an O—H⋯O hydrogen-bonded layer. The cation binds to the layer by an N—H⋯O hydrogen bond.

Partial Text

For the trihydrated 1,10-phenanthrolin-1-ium salts of d- and l-tartaric acid, see: Derikvand & Olmstead (2010 ▶); Wang et al. (2006 ▶).




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