| 单词 | ethylenic |
| 释义 | > as lemmasethyˈlenic ethyˈlenic adj. [perhaps after French éthylénique (1851 οr earlier)] containing, derived from, or characteristic of ethylene; containing the carbon–carbon double bond characteristic of ethylene and the alkenes. ΚΠ 1858 H. B. Jones & A. W. Hofmann Fownes's Man. Elem. Chem. (ed. 7) 477 An alcohol..standing to methylic alcohol in the same relation which obtains between ethylic and ethylenic alcohols. 1880 Jrnl. Chem. Soc. 38 604 (heading) Heats of combustion of glycerol and of ethylenic glycol. 1946 Nature 14 Dec. 876/2 The lachrymatory activity of some ethylenic compounds. 1964 N. G. Clark Mod. Org. Chem. ii. 14 The pair of valency bonds..which is the essential feature of the olefins and upon which their chemical properties depend, is referred to as an ethylenic or olefinic bond. 2008 Proc. National Acad. Sci. U.S.A. 105 12697/1 Interconversion occurs through rotation about the CC single bond connecting the ethylenic and propargyl molecular subunits. < as lemmas |
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