Abstract
Chemical shift measurements and discussion about specific splitting of some signals in 1H NMR spectra of amides and alkylureas in guanidine hydrochloride (Gu·HCl) solutions are presented. Our results suggest that alkylureas and amides form hydrogen bonds with Gu·HCl molecules. The above-mentioned splitting may be attributed to interaction with protons, non-exchanged with deuterium due to a slower exchange rate in water solution in the presence of structure-breaking ions.
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