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Noncovalent Interactions of π Systems with Sulfur: The Atomic Chameleon of Molecular Recognition |
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| Authors: | Prof William B Motherwell Dr Rafael B Moreno Dr Ilias Pavlakos Josephine R T Arendorf Dr Tanzeel Arif Dr Graham J Tizzard Prof Simon J Coles Dr Abil E Aliev |
| Institution: | 1. Department of Chemistry, University College London, London, UK;2. School of Chemistry, University of Southampton, Southampton, UK |
| Abstract: | The relative strength of noncovalent interactions between a thioether sulfur atom and various π systems in designed top pan molecular balances was determined by NMR spectroscopy. Compared to its oxygen counterpart, the sulfur atom displays a remarkable ability to interact with almost equal facility over the entire range of π systems studied, with the simple alkene emerging as the most powerful partner. With the exception of the O???heteroarene interaction, all noncovalent interactions of sulfur with π systems are favoured over oxygen. |
| Keywords: | conformational analysis molecular balances NMR spectroscopy noncovalent interactions π -interactions |