title: An orthorhombic polymorph of 10,11-dihydrocarbamazepine.
abstract: The title compound (systematic name: 10,11-dihydro-5H-dibenz[b,f]azepine-5-carboxamide), C15H14N2O, 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...pi 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.
authors: Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, Scotland. w.harrison@abdn.ac.uk
authors: William T A
authors: WT
authors: Harrison
authors: H S
authors: HS
authors: Yathirajan
authors: H G
authors: HG
authors: Anilkumar