Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9770160 | Journal of Molecular Structure | 2005 | 7 Pages |
Abstract
The crystal structures of two similar 1-R-2-methyl-4-nitroimidazoles, where R is allyl (CH2-CHCH2, 1) and 2-bromoethyl (CH2-CH2Br, 2) have been determined by means of X-ray crystallography at 100(1) K. In both cases the compounds crystallize with two different (symmetry-independent) molecules in the asymmetric part of the unit cell (Zâ²=2). The main motifs of crystal packing-molecular tapes-are created by C-Hâ¯N and strengthened by secondary C-Hâ¯O hydrogen bonds. The tapes form bilayers via Ïâ¯Ï interactions. The creation of these bilayers, the primary building blocks of the crystal structures, is possible because two symmetry-independent molecules have different conformations (1) or take part in different intermolecular interactions (2).
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Authors
Maciej Kubicki,