Web Release Date: December 21,
Ordered Aggregation of Benzamide Crystals Induced Using a "Motif Capper" Additive
and
Colloids, Crystals and Interfaces Group, Molecular, Materials Centre, Department of Chemical Engineering, UMIST, P.O. Box 88, Manchester M60 1QD, United Kingdom, School of Pharmacy, University of Bradford, Bradford BD7 1DP, United Kingdom, and School of Pharmacy and Chemistry, Liverpool John Moores University, James Parsons Building, Byrom Street, Liverpool L3 3AF, United Kingdom
Received June 4, 2004
Revised October 25, 2004
Abstract:
This paper reports on the growth of benzamide crystals in the presence of 2'-aminoacetophenone. The resulting self-replicating intergrowth of benzamide crystals gives rise to ordered crystal aggregates in which individuals share a common c*. This behavior is interpreted using the concept of a "motif capper" additive which is able to halt the extension of structural motifs at the surface of a growing crystal. In this case the additive was selected to terminate the hydrogen-bonding ribbons, which extend along the b axis of the benzamide structure.
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