A solvent-mediated conformational switch in sulfanilamide.

Autor: Mato, Sergio, Aguado, Raúl, Mata, Santiago, Alonso, José Luis, León, Iker
Zdroj: Physical Chemistry Chemical Physics (PCCP); 10/21/2022, Vol. 24 Issue 39, p24032-24038, 7p
Abstrakt: Sulfanilamide, a widely used antibacterial drug, has been brought into the gas phase using laser ablation techniques, and its structure has been characterized in the isolated conditions of a supersonic expansion using Fourier transform microwave techniques. A single conformer stabilized by an N–H⋯O=S intramolecular interaction in an equatorial disposition has been unequivocally characterized. To emulate the microsolvation process, we studied its hydrated cluster. The results show that a single water molecule alters the conformational preference and forces sulfanilamide to switch from its initial eclipsed configuration to a staggered disposition. The observed hydrated cluster adopts a structure in which water forms three hydrogen bonds with sulfanilamide stabilizing the molecule. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index