title: Temperature investigations of E/Z isomers in ketimines based of p-dibenzoylobenzene with aniline and 2,6-dimethylaniline by infrared spectroscopy.
abstract: The reaction of aniline with p-dibenzoylobenzene (K1) can lead to Z/Z, Z/E and E/E isomers however the only Z/Z and E/E were formed. At room temperature these isomers may be separated, thus the corresponding FTIR spectra could be recorded. The observed bands were assigned and temperature investigations were lead to monitor the structural changes during heating Z and E forms of K1 from 20 to 240 degrees C. FTIR spectroscopy showed that the bigger changes of the Z form was observed with an increase of temperature. Similar experience was lead with the ketimine synthesized from 2,6-dimethylaniline and p-dibenzoylobenzene (K2) investigated as a mixture of isomers.
authors.affiliation: Centre of Polymer Chemistry, Polish Academy of Science, 34 M. Curie-Sklodowska Street, 41-819 Zabrze, Poland. bkaczmar@cchp-pan.zabrze.pl
authors.forename: Bozena
authors.initials: B
authors.lastname: Kaczmarczyk
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Iwan
authors.forename: Danuta
authors.initials: D
authors.lastname: Sek
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D001555:Benzene Derivatives / Q000737:chemistry*; D007097:Imines / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D017550:Spectroscopy, Fourier Transform Infrared; D013237:Stereoisomerism; D013816:Thermodynamics
chemical_list: D000814:Aniline Compounds; D001555:Benzene Derivatives; D007097:Imines; C007766:2,6-xylidine; C023650:aniline