The Structures of Uncommon Cationic N‐alkenyl Purine and Pyrimidine Bases |
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| Authors: | Gabriele Kociok‐Köhn Kieran C. Molloy Gareth J. Price Douglas R. G. Smith |
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| Affiliation: | Department of Chemistry, University of Bath, Bath, UK |
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| Abstract: | The structures of 1,3 bis‐(allyl)cytosinium bromide ( 1 ), 7,9 bis‐(allyl)adeninium bromide hydrate ( 2 ) and 3‐(butenyl)adeninium bromide ( 3 ) have been determined. 1 is dimeric via N―H…Br hydrogen bonds, which further associate into ribbons via weaker C―H…Br interactions. 2 is also dimeric, now from N―H…N hydrogen bonds, which build up further through a complex array of hydrogen bonds involving both the anion and water of crystallization (O―H…N, O―H…Br, C―H…Br). 3 does not dimerise but forms polymeric sheets via a series of N―H…N, C―H…N and C―H…Br hydrogen bonds. |
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