The Polymorphism of 2-Benzoyl-N,N-diethylbenzamide

Crystals

Jie Liu¹  Elumalai Gopi¹  Lygia S. de Moraes¹  Ryusei Oketani¹  Yves H. Geerts¹  Alan R. Kennedy² 

[1] Laboratoire de Chimie des Polymères, Faculté des Sciences, Université Libre de Bruxelles (ULB), Boulevard du Triomphe, CP 206/01, 1050 Bruxelles, Belgium;WestCHEM, Department of Pure & Applied Chemistry, University of Strathclyde, Glasgow G1 1XL, UK;

关键词: polymorphism;    variable temperature;    organic;   

DOI  :  10.3390/cryst11081004

来源: DOAJ

【 摘 要 】

The crystal structures of two new polymorphs of 2-benzoyl-N,N-diethylbenzamide were obtained after recrystallization trials with different solvents. The new forms II and III were monoclinic and crystallized in the same space group with similar a, b and c lengths but different β angles. The forms had no conformation differences within themselves; however, the long-range packing (>two unit cells) was not isostructural. In comparison with the previously published crystal structure, form I, different conformations and packing arrangements were observed. The new form II was thermally characterized and stable at room temperature, when heated up to its melting point and when cooled to −170 °C. Additionally, once form II was re-heated, a fourth form is observed after a phase transition from the monoclinic to the orthorhombic crystal systems, form IV.

【 授权许可】

Unknown