title: Study of cyclic quaternary ammonium bromides by B3LYP calculations, NMR and FTIR spectroscopies.
abstract: N,N-dioctyl-azepanium, -piperidinium and -pyrrolidinium bromides 1-3, have been obtained and characterized by FTIR and NMR spectroscopy. DFT calculations have also been carried out. The optimized bond lengths, bond angles and torsion angles calculated by B3LYP/6-31G(d,p) approach have been presented. Both FTIR and Raman spectra of 1-3 are consistent with the calculated structures in the gas phase. The screening constants for 13C and 1H atoms have been calculated by the GIAO/B3LYP/6-31G(d,p) approach and analyzed. Linear correlations between the experimental 1H and 13C chemical shifts and the computed screening constants confirm the optimized geometry.
authors: Laboratory of Microbiocides Chemistry, Faculty of Chemistry, A. Mickiewicz University, Grunwaldzka 6, Poznań, Poland. brycki@amu.edu.pl
authors: Bogumił
authors: B
authors: Brycki
authors: Adrianna
authors: A
authors: Szulc
authors: Iwona
authors: I
authors: Kowalczyk
mesh_terms: D001965:Bromides / Q000138:chemical synthesis / Q000737:chemistry*; D003500:Cyclization; D009682:Magnetic Resonance Spectroscopy; D008956:Models, Chemical; D008958:Models, Molecular; D000644:Quaternary Ammonium Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman
chemical_list: D001965:Bromides; D000644:Quaternary Ammonium Compounds