Crystal structure of the non-steroidal anti-inflammatory drug (NSAID) tolmetin sodium

Acta Crystallogr E Crystallogr Commun. 2021 Jan 19;77(Pt 2):134-137. doi: 10.1107/S2056989021000414. eCollection 2021 Feb 1.

Abstract

The asymmetric unit of the title compound, sodium 2-[1-methyl-5-(4-methyl-benzo-yl)-1H-pyrrol-2-yl]acetate dihydrate, Na+·C15H14NO3 -·2H2O, contains two sodium cations, two organic anions (A and B) and two water mol-ecules. The coordination geometry around the sodium cations corresponds to a distorted octa-hedron. Each pair of sodium cations (A-A or B-B) is chelated by two bridging anions coordinated by the O atoms of the deprotonated carb-oxy-lic groups, and each sodium atom is coordinated by an O atom of a third anion, which connects pairs of sodium atoms, and a water mol-ecule. As a result, a two-dimensional polymer is formed in the crystal. Hirshfeld surface analysis and two-dimensional fingerprint plots were used to analyze the inter-molecular contacts present in the crystal.

Keywords: NSAIDs; crystal structure; sodium 2-(1-methyl-5-(4-methyl­benzo­yl)-1H-pyrrol-2-yl)acetate dihydrate; tolmetin sodium.