The divalent hydrocarbon radical —CH2CH2—. Chiefly attributive, in names of chemical compounds (cf. compounds).
| 单词 | θ69429 |
| 释义 | the world > matter > chemistry > organic chemistry > hydrocarbons > [noun] > hydrocarbon radicals > bivalent radicals (6) ethylene1853 The divalent hydrocarbon radical —CH2CH2—. Chiefly attributive, in names of chemical compounds (cf. compounds). ethylidene1859 The divalent hydrocarbon radical CHCH3. Usually attributive or a formative element in chemical names. propylidene1876 The divalent hydrocarbon radical CH·CH2CH3. Usually attributive or a formative element in chemical names. pentamethylene1887 (a) the cyclic hydrocarbon cyclopentane, C5H10 (now rare); (b) the divalent straight-chain radical —(CH2)5—, present in pentamethylenediamine. vinylidene1898 The bivalent radical CH2 = C<; frequently attributive. Cf. polyvinylidene, n. isopropylidene1900 the bivalent radical (CH3)2C=, frequently introduced into compounds by reaction with acetone. |
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