In chemistry, vinylene (also ethenylene or 1,2-ethenediyl) is a divalentfunctional group (a part of a molecule) with formula −CH=CH−; namely, two carbons, each connected to the other by a double bond, to an hydrogen atom by a single bond, and to the rest of the molecule by another single bond.
This group can be viewed as a molecule of ethene (ethylene, H2C=CH2) with a hydrogen removed from each carbon; or a vinyl group −CH=CH2 with one hydrogen removed from the terminal carbon. It should not be confused with the vinylidene group =C=CH2 or >C=CH2.
A vinylene unit attached to two distinct atoms other than hydrogen (namely R−CH=CH−R') is a source of cis-trans isomerism.
Vinylidene group, the other divalent group with formula C2H2, with structure CH2=C<
References
↑Liu, Qibo; Burton, Donald J. (2002-05-02). "Stereoselective preparation of (E)-(1,2-difluoro-1,2-ethenediyl) bis[tributylstannane] and stereospecific synthesis of (E)-1,2-difluorostilbenes". Organic Letters. 4 (9): 1483–1485. doi:10.1021/ol025686+. ISSN1523-7060. PMID11975609.
↑Blockhuys, null; Claes, null; Van Grieken R, null; Geise, null (2000-07-15). "Assessing the molecular weight of a conducting polymer by grazing emission XRF". Analytical Chemistry. 72 (14): 3366–3368. doi:10.1021/ac990877k. ISSN1520-6882. PMID10939413.
↑Mukherjee, Soumya (2019-01-01). "Recent advancements in the mechanism of nitric oxide signaling associated with hydrogen sulfide and melatonin crosstalk during ethylene-induced fruit ripening in plants". Nitric Oxide: Biology and Chemistry. 82: 25–34. doi:10.1016/j.niox.2018.11.003. ISSN1089-8611. PMID30465876. S2CID53753053.
↑Valentini, Alessio; Rivero, Daniel; Zapata, Felipe; García-Iriepa, Cristina; Marazzi, Marco; Palmeiro, Raúl; Fdez Galván, Ignacio; Sampedro, Diego; Olivucci, Massimo; Frutos, Luis Manuel (2017-03-27). "Optomechanical Control of Quantum Yield in Trans-Cis Ultrafast Photoisomerization of a Retinal Chromophore Model". Angewandte Chemie International Edition. 56 (14): 3842–3846. Bibcode:2017ACIE...56.3842V. doi:10.1002/anie.201611265. hdl:10017/59483. ISSN1521-3773. PMID28251753.