| 单词 | n-propyl |
| 释义 | > as lemmasn-propyl Either of two alkyl radicals having the formula —C3H7, derived from propane by loss of a hydrogen atom; (esp.) (also n-propyl, 1-propyl) the primary radical —CH2CH2CH3. Cf. isopropyl n. at iso- comb. form 2b. Chiefly attributive or a formative element in chemical names. ΘΚΠ the world > matter > chemistry > organic chemistry > hydrocarbons > [noun] > hydrocarbon radicals > named, by number of carbon atoms > three propyl1850 trityl1854 vinyl1863 iso-propyl1866 isopropenyl1885 1850 A. W. Hofmann in Philos. Trans. (Royal Soc.) 140 127 Substances of the formula C18H13N will also be obtained..by fixing upon aniline the radical (propyl) belonging to the missing alcohol of propionic acid. 1887 S. Moore & E. Aveling tr. K. Marx Capital I. i. 18 Butyric acid is a different substance from propyl formate. Yet both are made up of the same chemical substances, carbon (C), hydrogen (H), and oxygen (O), and that, too, in like proportions—namely, C4H8O2. 1950 Thorpe's Dict. Appl. Chem. (ed. 4) X. 223/1 n-Propyl radical is formed by exposing the vapour of di-n-propyl ketone to ultra-violet light at 2 mm. pressure. 1981 P. Sykes Guidebk. to Mechanism in Org. Chem. (ed. 5) v. 108 The 1-propyl cation rearranged to the 2-propyl cation by the migration of a hydrogen atom with its electron pair from C2 to the carbonium ion carbon C1. 1987 E. Ronay Bird's Eye Guide Healthy Eating Out 21/1 Some additives..are synthetic such as the antioxidant propyl gallate. < as lemmas |
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