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Chemical Bonding in Polarised Push–Pull Ethylenes
Author(s) -
Yanai Hikaru,
Suzuki Takumi,
Kleemiss Florian,
Fukaya Haruhiko,
Dobashi Yasuo,
Malaspina Lorraine A.,
Grabowsky Simon,
Matsumoto Takashi
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201904176
Subject(s) - planar , diffraction , resonance (particle physics) , chemistry , crystallography , charge (physics) , high resolution , computational chemistry , atomic physics , physics , optics , computer graphics (images) , quantum mechanics , computer science , remote sensing , geology
1,1‐Diamino‐2,2‐bis(triflyl)ethylenes with both twisted and planar structures around the partial “C=C” bond were synthesised. Bonding properties in these compounds were analysed by an experimental approach using high‐resolution X‐ray diffraction data treated with X‐ray wavefunction refinement (XWR). In the twisted compound, a dominant contribution of the charge‐separated resonance structure was revealed. On the contrary, the nearly planar compound still showed π‐bonding character, however, with a considerable contribution of the charge‐separated resonance structure.