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.
Subject(s)
Carbamazepine/analogs & derivatives , Carbamazepine/chemistry , Crystallization , Crystallography, X-Ray , Hydrogen Bonding , Models, MolecularABSTRACT
The racemic title compound, C15H12Br2O, crystallizes in a non-centrosymmetric structure and displays a significant non-linear optical response to red light. The crystal packing is influenced by C-H...O and C-H...pi interactions. One of the former bonds has a short H...O separation of 2.27 angstroms.
