“…Many structural studies such as X-ray analysis, [37] UV, [38] 1 H NMR [39] and photoelectron spectroscopy, [40] IR and Raman spectra [41] have implied the non-planar conformation of the azomethine compounds in solid or solution phase. For instance, X-ray analysis of benzylideneaniline has shown that the aniline ring is twisted out of the C1N2C1C plane by 55 8, while the benzylidene ring is twisted by 10 8, and this agrees with its anomalous UV spectrum compared with the planar stilbene and azobenzene molecules.…”