Mohamed Shaaban K, Mague Joel T, Akkurt Mehmet, Potgieter Herman, Albayati Mustafa R
Chemistry and Environmental Division, Manchester Metropolitan University, Manchester M1 5GD, England ; Chemistry Department, Faculty of Science, Minia University, 61519 El-Minia, Egypt.
Department of Chemistry, Tulane University, New Orleans, LA 70118, USA.
Acta Crystallogr Sect E Struct Rep Online. 2014 May 10;70(Pt 6):o645-6. doi: 10.1107/S1600536814010010. eCollection 2014 Jun 1.
The title compound, C21H17N3O3, is a new polymorph of an already published structure [Shashidhar et al. (2006 ▶). Acta Cryst. E62, o4473-o4475]. The previously reported structure crystallizes in the monoclinic space group C2/c, whereas the structure reported here is in the tetra-gonal space group I41/a. The bond lengths and angles are similar in both structures. The mol-ecule adopts an extended conformation via intra-molecular N-H⋯O and O-H⋯N hydrogen bonds; the terminal phenyl ring and the hy-droxy-lphenyl ring are twisted with respect to the central benzene ring by 44.43 (7) and 21.99 (8)°, respectively. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds, weak C-H⋯O hydrogen bonds and weak C-H⋯π inter-actions into a three-dimensional supra-molecular network.
标题化合物C21H17N3O3是已发表结构[Shashidhar等人（2006年▶）。《晶体学报》E62，o4473 - o4475]的一种新多晶型物。先前报道的结构在单斜空间群C2/c中结晶，而此处报道的结构在四方空间群I41/a中。两种结构中的键长和键角相似。分子通过分子内N - H⋯O和O - H⋯N氢键采取伸展构象；末端苯环和羟基苯环相对于中心苯环分别扭转44.43（7）°和21.99（8）°。在晶体中，分子通过N - H⋯O氢键、弱C - H⋯O氢键和弱C - H⋯π相互作用连接成三维超分子网络。
