1. Five- and six-membered N–H⋯S hydrogen bonding in aromatic amides
- Author
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Du, Ping, Jiang, X-Kui, and Li, Zhan-Ting
- Subjects
- *
HYDROGEN bonding , *AMIDES , *CHEMICAL structure , *INTERMOLECULAR forces , *NUCLEAR magnetic resonance , *CHEMISTRY experiments - Abstract
Abstract: The capacity of sulfur to form intramolecular five- or six-membered S⋯H–N hydrogen bonding in aromatic amides is assessed. The five-membered S⋯H–N hydrogen bonding is observed in crystal structures of five compounds, whereas the six-membered S⋯H–N hydrogen bonding is revealed in crystal structures of three compounds. The trityl group has been used to promote formation of the weak hydrogen bonding because it efficiently inhibits the competition of the intermolecular CH–N hydrogen bonding. (2D) 1H NMR experiments indicate that both patterns also exist in chloroform. [Copyright &y& Elsevier]
- Published
- 2009
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