alkenen.

Brit.

/ˈalkiːn/, U.S.

/ˈælˌkin/

Origin: Formed within English, by compounding; modelled on a German lexical item. Etymons: alkyl n., -ene comb. form.

Etymology: < alk- (in alkyl n.) + -ene comb. form, after German Alken (1897 in the passage translated in quot. 1899). Compare alkane n., alkyne n.

Chemistry.

Any of the series of unsaturated hydrocarbons containing a single double bond and having the general formula C_nH_2n (= olefin n. 1); (more widely) any open-chain or cyclic hydrocarbon with one or more double bonds between carbon atoms; = alkylene n.The simplest members of the alkene series are C₂H₄ (ethene or ethylene) and C₃H₆ (propene or propylene).

ΘΚΠ

the world > matter > chemistry > organic chemistry > hydrocarbons > [noun] > alkenes

olefin1860

alkylene1886

alkene1899

1899 E. F. Smith tr. V. von Richter Org. Chem. (ed. 3) I. 89 C_nH_2n: Olefines, Alkylens, Alkenes [Ger. Alkene].

1925 Jrnl. Amer. Chem. Soc. 47 810 The variation in the production of alkene, alkane and hydrogen by different titanias is shown.

1944 L. F. Fieser & M. Fieser Org. Chem. iii. 53 The Geneva system provides the convenient generic term alkene, which designates the hydrocarbons of the series comprising ethylene and its homologues.

1989 Science 17 Feb. 907/1 Ring-opening polymerization of cyclic alkenes.

2001 School Sci. Rev. Sept. 51/2 A way of adding chlorine and hydrogen peroxide across the double bonds of alkenes to produce compounds called chlorohydroperoxides.

This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021).

单词	alkene
释义	alkenen. Brit. /ˈalkiːn/, U.S. /ˈælˌkin/ Origin: Formed within English, by compounding; modelled on a German lexical item. Etymons: alkyl n., -ene comb. form. Etymology: < alk- (in alkyl n.) + -ene comb. form, after German Alken (1897 in the passage translated in quot. 1899). Compare alkane n., alkyne n. Chemistry. Any of the series of unsaturated hydrocarbons containing a single double bond and having the general formula C_nH_2n (= olefin n. 1); (more widely) any open-chain or cyclic hydrocarbon with one or more double bonds between carbon atoms; = alkylene n.The simplest members of the alkene series are C₂H₄ (ethene or ethylene) and C₃H₆ (propene or propylene). ΘΚΠ the world > matter > chemistry > organic chemistry > hydrocarbons > [noun] > alkenes olefin1860 alkylene1886 alkene1899 1899 E. F. Smith tr. V. von Richter Org. Chem. (ed. 3) I. 89 C_nH_2n: Olefines, Alkylens, Alkenes [Ger. Alkene]. 1925 Jrnl. Amer. Chem. Soc. 47 810 The variation in the production of alkene, alkane and hydrogen by different titanias is shown. 1944 L. F. Fieser & M. Fieser Org. Chem. iii. 53 The Geneva system provides the convenient generic term alkene, which designates the hydrocarbons of the series comprising ethylene and its homologues. 1989 Science 17 Feb. 907/1 Ring-opening polymerization of cyclic alkenes. 2001 School Sci. Rev. Sept. 51/2 A way of adding chlorine and hydrogen peroxide across the double bonds of alkenes to produce compounds called chlorohydroperoxides. This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021). < n.1899
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