title: The influence of substituent effects on spectroscopic properties examined on benzylidene aniline-type imines.
abstract: Six selected benzylidene aniline-type prochiral imines were characterised by means of ATR-IR, UV-vis and Raman spectroscopy. A detailed UV-vis spectroscopic study supported by data obtained from single crystal X-ray analysis reveals the influence of the conformation of the imine on the electronic state. Additionally, the electronic effects of the substituents located in 4,4'-position on the shape of the UV-vis spectra were discussed. The influence of the substituents on the vibrational state of the CN double bond has been studied by ATR-IR spectroscopy using solid and dissolved samples. Finally, solvatochromatism and solvent-introduced tautomerism have been investigated by UV-vis and Raman spectroscopy. The effect of inter- and intramolecular hydrogen bond formation was demonstrated by changes of characteristic bands in the spectra.
authors.affiliation: Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Str. 29a, D-18059 Rostock, Germany.
authors.forename: Leif R
authors.initials: LR
authors.lastname: Knöpke
authors.forename: Anke
authors.initials: A
authors.lastname: Spannenberg
authors.forename: Angelika
authors.initials: A
authors.lastname: Brückner
authors.forename: Ursula
authors.initials: U
authors.lastname: Bentrup
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D001554:Benzene / Q000737:chemistry*; D018360:Crystallography, X-Ray; D007097:Imines / Q000737:chemistry*; D008968:Molecular Conformation; D012997:Solvents / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013059:Spectrum Analysis, Raman; D013237:Stereoisomerism
chemical_list: D000814:Aniline Compounds; D007097:Imines; D012997:Solvents; D001554:Benzene; C023650:aniline