The structure and intramolecular mobility of some derivatives bis(thio)phosphorylated amides in CCl4, CD2Cl2, CD3CN solutions were examined by 1H 31P NMR spectroscopy. A comparative analysis the temperature-dependent spectra studied compounds with symmetric asymmetric substitution at phosphorus atoms was carried out. Various processes identified – rotation around C-N bonds, conformational trans...

A metal ion that attaches to a peptide backbone has the choice of binding to an amide carbonyl oxygen atom or to an amide nitrogen atom by replacement of the amide proton. Coordination to the nitrogen atom is normally accompanied by elimination of the proton, thereby resulting in deprotonation of the ligand. An alternative possibility, not involving deprotonation, is the unusual amide/iminol ta...

The molecular structures of sulphonamides are interesting for evaluating their mobility in soils and preparing composite complexes optimizing the use these drugs. In this work, several arylsulfonamides along with conformational analysis tautomerism were investigated theoretically. spectroscopical properties arylsulfonamides, also studied at level by using a computational modeling quantum mechan...