It is shown that the ethylene bond in (<I>E</I>) -stilbenes is often observed unusually short by X-ray diffraction. Detailed analyses of the temperature dependent X-ray structures reveal that the short ethylene bond is an artifact caus...
Analyses of the X-ray diffraction data of (E) -stilbenes revealed that the X-ray structures of these compounds commonly show an unusually short bond length for the ethylene bond and a strong temperature dependence for the molecular structure. It i...