Open AccessAn orthorhombic polymorph of 10,11‐dihydrocarbamazepine
Author(s) -
Anilkumar H. G.,
Yathirajan H. S.,
Harrison William T. A.
Publication year - 2006
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
eISSN - 1600-5759
pISSN - 0108-2701
DOI - 10.1107/s0108270106008651
Subject(s) - azepine , monoclinic crystal system , orthorhombic crystal system , crystallography , van der waals force , chemistry , ring (chemistry) , bent molecular geometry , crystal (programming language) , crystal structure , stereochemistry , molecule , organic chemistry , computer science , programming language
The title compound (systematic name: 10,11‐dihydro‐5 H ‐dibenz[ b , f ]azepine‐5‐carboxamide), C 15 H 14 N 2 O, is shown to crystallize as an orthorhombic polymorph to complement the known monoclinic form. The molecular conformations of both forms are very similar, involving a bent conformation for the seven‐membered azepine ring and an overall `butterfly' shape. The molecules assemble into chains by way of N—H⋯O bonds and N—H⋯π interactions in both crystal modifications. The two polymorphs appear to form due to different van der Waals interactions between the layer‐like sheets of molecules.