An orthorhombic polymorph of 10,11 -dihydrocarbamazepine

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-me...

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Bibliographic Details
Published in:Acta crystallographica. Section C, Crystal structure communications Crystal structure communications, 2006-05, Vol.62 (Pt 5), p.o240-o242
Main Authors: HARRISON, William T. A, YATHIRAJAN, H. S, ANILKUMAR, H. G
Format: Article
Language:English
Subjects:
Carbamazepine - analogs & derivatives
Carbamazepine - chemistry
Condensed matter: structure, mechanical and thermal properties
Crystalline state (including molecular motions in solids)
Crystallization
Crystallographic aspects of phase transformations
pressure effects
Crystallography, X-Ray
Exact sciences and technology
Hydrogen Bonding
Models, Molecular
Physics
Structure of solids and liquids
crystallography
Structure of specific crystalline solids
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Summary: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.
ISSN:0108-2701
1600-5759
DOI:10.1107/S0108270106008651