Crystal structure of 4-bromo-2-[(E)-N-(2,2,6,6-tetra-methyl-piperidin-4-yl)carboximido-yl]phenol dihydrate

Joel T Mague; Shaaban K Mohamed; Mehmet Akkurt; Antar A Abdelhamid; Mustafa R Albayati

doi:10.1107/S2056989015007471

Crystal structure of 4-bromo-2-[(E)-N-(2,2,6,6-tetra-methyl-piperidin-4-yl)carboximido-yl]phenol dihydrate

Acta Crystallogr E Crystallogr Commun. 2015 Apr 25;71(Pt 5):o349-50. doi: 10.1107/S2056989015007471. eCollection 2015 May 1.

Authors

Joel T Mague¹, Shaaban K Mohamed², Mehmet Akkurt³, Antar A Abdelhamid⁴, Mustafa R Albayati⁵

Affiliations

¹ Department of Chemistry, Tulane University, New Orleans, LA 70118, USA.
² Chemistry and Environmental Division, Manchester Metropolitan University, Manchester M1 5GD, England ; Chemistry Department, Faculty of Science, Minia University, 61519 El-Minia, Egypt.
³ Department of Physics, Faculty of Sciences, Erciyes University, 38039 Kayseri, Turkey.
⁴ Department of Chemistry, Faculty of Science, Sohag University, 82524 Sohag, Egypt.
⁵ Kirkuk University, College of Science, Department of Chemistry, Kirkuk, Iraq.

Abstract

In the title hydrate, C16H23BrN2O·2H2O, the organic mol-ecule features a strong intra-molecular O-H⋯N hydrogen bond. The piperidine ring, in addition, adopts a chair conformation with the exocyclic C-N bond in an equatorial orientation. The water molecules of crystallization are disordered (each over two sets of sites with half occupancy. In the crystal, they associate into corrugated (100) sheets of (H2O)4 tetra-mers linked by O-H⋯O hydrogen bonds. The organic mol-ecules, in turn, are arranged at both sides of these sheets, linked by water-piperidine O-H⋯N hydrogen bonds.

Keywords: Schiff bases; crystal structure; hydrogen bonding; piperidines.