Effect of a Rigid Sulfonamide Bond on Molecular Folding: A Case Study
CRYSTAL GROWTH & DESIGN(2015)
Abstract
A disulfonamide-compound with bulky aromatic side chains was prepared, and its properties as potential building block for foldamers were evaluated. Two different solvate crystal forms of the compound were identified and compared to the structures of an analogous oligoamide and related disulfonamides. The disulfonamide is unfolded in one of the solvates, whereas in the : other one; a loosely folded conformer stabilized :by an intramolecular hydrogen bond is found. Density functional Calculations indicated that the loosely: folded conformer is slightly more stable than its unfolded isomer. The calculations also identified a third, more tightly folded and mote extensively hydrogen bonded, conformer that is even lower in energy.
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Key words
rigid sulfonamide bond,molecular folding
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