[Zurück]

H. Kriegner, M. Weil, M. Jones:
"The methanol sesquisolvate of sodium naproxen";
Acta Crystallographica Section E: Crystallographic Communications, - (2018), 74; S. 1624 - 1627.

The asymmetric unit of the methanol solvate of sodium naproxen, systematic name: sodium (2S)-2-(6-meth­oxy­naphthalen-2-yl)propano­ate methanol sesquisolvate, Na+·C14H13O3 −·1.5CH3OH, comprises two formula units of the mol­ecular salt and three methanol mol­ecules. One of the sodium cations exhibits a coordination number of six and is bonded to three carboxyl­ate O atoms and three methanol OH groups whereas the second sodium cation has a coordination number of seven, defined by five carboxyl­ate O atoms and two methanol OH groups. Both coordination polyhedra around the sodium cations are considerably distorted. The two types of cations are bridged into polymeric chains extending parallel to [010]. This arrangement is stabilized by intrachain O-H⋯O hydrogen bonds between methanol ligands as donor and carboxyl­ate O atoms as acceptor groups. The hydro­phobic 6-meth­oxy­naphthyl moieties flank the hydro­philic sodium oxygen chains into ribbons parallel to [010]. There are no noticeable inter­molecular inter­actions between these ribbons. One of the 6-meth­oxy­naphthyl moieties is disordered over two sets of sites in a 0.723 (3):0.277 (3) ratio.

http://dx.doi.org/10.1107/S2056989018014652