For the organic compound with the common name allene, see propadiene.
Propadiene, the simplest allene, is also known as allene
In organic chemistry, allenes are organic compounds in which one carbon atom has double bonds with each of its two adjacent carbon atoms (R2C=C=CR2, where R is H or some organyl group).[1] Allenes are classified as cumulated dienes. The parent compound of this class is propadiene (H2C=C=CH2), which is itself also called allene. A group of the structure R2C=C=CR− is called allenyl, while a substituent attached to an allene is referred to as an allenic substituent (R is H or some alkyl group). In analogy to allylic and propargylic, a substituent attached to a saturated carbon α (i.e., directly adjacent) to an allene is referred to as an allenylic substituent. While allenes have two consecutive ('cumulated') double bonds, compounds with three or more cumulated double bonds are called cumulenes.
^IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). Online corrected version: (2006–) "allenes". doi:10.1351/goldbook.A00238
group). Allenes are classified as cumulated dienes. The parent compound of this class is propadiene (H2C=C=CH2), which is itself also called allene. A group...
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interest. Typical allene oxides require steric protection for their isolation. Certain derivatives can be prepared by epoxidation of the allenes with peracetic...
Allene Tew Hostetter Nichols Burchard Reuß zu Köstritz de Kotzebue (July 7, 1872 – May 1, 1955) was an American socialite during the Gilded Age who became...
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In enzymology, an allene-oxide cyclase (EC 5.3.99.6) is an enzyme that belongs to the family of isomerases, specifically a class of other intramolecular...
or by torsional stiffness of the bonds, as in the C=C double bonds in allenes such as glutinic acid. Axial chirality is most commonly observed in substituted...
Allene Johnson (born April 20, 1933) is a retired chemical educator who taught in the Summit, New Jersey school system for over 40 years. Johnson was one...
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(+)-Lysergol, and (+)-Isolysergol by Palladium-Catalyzed Domino Cyclization of Allenes Bearing Amino and Bromoindolyl Groups". J. Org. Chem. 76 (7): 2072–2083...
Myers, Andrew G.; Zheng, Bin (1996). "New and Stereospecific Synthesis of Allenes in a Single Step from Propargylic Alcohols". Journal of the American Chemical...
have been developed. In the presence of unpolarized alkenes, alkynes or allenes, diimide is converted into dinitrogen with reduction (net addition of dihydrogen)...
of California, Irvine. At UC Irvine she worked on addition reactions in allenes and bonding and reactions of sulfur compounds. She was one of the first...
Myers, Andrew G.; Zheng, Bin (1996). "New and Stereospecific Synthesis of Allenes in a Single Step from Propargylic Alcohols". Journal of the American Chemical...
Marilyn Allene Hickey (born July 1, 1931) is an American Christian minister and televangelist who teaches Bible studies both nationally and internationally...
three or more cumulative (consecutive) double bonds. They are analogous to allenes, only having a more extensive chain. The simplest molecule in this class...
Jacqueline Allene Means is an American Anglican priest. On January 1, 1977, she became the first woman to be regularly ordained a priest in the Episcopal...
substrates that have been investigated include alkenes, dienes, alkynes, and allenes. For intramolecular hydroamination, various aminoalkenes have been examined...
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