Crystal structure of (4-methoxyphenyl)[(4-methoxyphenyl)phosphonato]dioxidophosphate(1−) 2-amino-6-benzyl-3-ethoxycarbonyl-4,5,6,7-tetrahydrothieno[2,3- c ]pyridin-6-ium

• Published in: Acta crystallographica. Section E, Crystallographic communications Crystallographic communications, 2015-12, Vol.71 (12), p.o997-o998
• Main Authors: Mague, Joel T., Mohamed, Shaaban K., Akkurt, Mehmet, Younes, Sabry H. H., Ahmed, Essam K., Albayati, Mustafa R.
• Format: Article
• Language: English
• Subjects: crystal structure; hydrogen bonding; Lawson reagent; molecular salt; thienopyridines
• ISSN: 2056-9890; 2056-9890
• DOI: 10.1107/S2056989015022331

The asymmetric unit of the title molecular salt, C 17 H 21 N 2 O 2 S + ·C 14 H 15 O 7 P 2 − , comprises two cations and two anions. Each cation features an intramolecular N—H...O hydrogen bond, which closes an S (6) ring; in each case the hydropyridine ring adopts a half-chair conformation. In the anions, the dihedral angles between the aromatic rings are 64.1 (2) and 54.9 (2)°. In each case, the diphosphate groups are close to eclipsed [C—P...P—C pseudo-torsion angles = 11.6 (2) and −19.3 (2)°]. One of the methoxy groups in each anion is disordered over two orientations in a 0.539 (18):0.461 (18) ratio in one anion and 0.82 (2):0.18 (2) in the other. In the crystal, O—H...O and N—H...O hydrogen bonds link the components into [100] chains. Numerous C—H...O interactions cross-link the chains into a three-dimensional network.