propenyln.

Brit.

/ˈprəʊpᵻnʌɪl/,

/ˈprəʊpᵻn(ɪ)l/, U.S.

/ˈproʊpənəl/

Origin: A borrowing from German. Etymon: German Propenyl.

Etymology: < German Propenyl (A. W. Hofmann 1866, in Monatsbericht der Königl. Preuss. Akad. der Wissenschaften zu Berlin, 1865 653) < Propen propene n. + -yl -yl suffix.

Chemistry.

Either of two isomeric unsaturated hydrocarbon radicals related to propene. Usually attributive or a formative element in chemical names.Formula: —CH=CHCH₃, and (occasionally) —CH₂CH=CH₂.

ΚΠ

1867 A. W. Hofmann in Proc. Royal Soc. 1866–7 15 58 Propenyl, (C₃ H₅)‴.

1877 H. Watts Fownes's Man. Chem. (ed. 12) II. 24 Among these [nitrils] special mention must be made of a group consisting of nitrogen combined with a trivalent hydrocarbon-radicle, such as..Propenyl nitril... = CN.C₂H₅ Ethyl cyanide.

1935 Science Nov. 422/1 In the case of the crotonic aldehyde product, the double bond of the propenyl side chain introduces..the added complication of cis trans isomerism.

1967 I. L. Finar Org. Chem. (ed. 5) I. xxx. 809 2-picoline condenses with acetaldehyde in the presence of warm aqueous sodium hydroxide to form 2-propenylpyridine.

1995 Independent 3 Oct. (Suppl.) 15/4 This [sc. chopping an onion] releases enzymes which take part in complex biochemical reactions. One of these produces..propenyl sulphuric acid. This is a very volatile irritant.

This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022).

单词	propenyl
释义	propenyln. Brit. /ˈprəʊpᵻnʌɪl/, /ˈprəʊpᵻn(ɪ)l/, U.S. /ˈproʊpənəl/ Origin: A borrowing from German. Etymon: German Propenyl. Etymology: < German Propenyl (A. W. Hofmann 1866, in Monatsbericht der Königl. Preuss. Akad. der Wissenschaften zu Berlin, 1865 653) < Propen propene n. + -yl -yl suffix. Chemistry. Either of two isomeric unsaturated hydrocarbon radicals related to propene. Usually attributive or a formative element in chemical names.Formula: —CH=CHCH₃, and (occasionally) —CH₂CH=CH₂. ΚΠ 1867 A. W. Hofmann in Proc. Royal Soc. 1866–7 15 58 Propenyl, (C₃ H₅)‴. 1877 H. Watts Fownes's Man. Chem. (ed. 12) II. 24 Among these [nitrils] special mention must be made of a group consisting of nitrogen combined with a trivalent hydrocarbon-radicle, such as..Propenyl nitril... = CN.C₂H₅ Ethyl cyanide. 1935 Science Nov. 422/1 In the case of the crotonic aldehyde product, the double bond of the propenyl side chain introduces..the added complication of cis trans isomerism. 1967 I. L. Finar Org. Chem. (ed. 5) I. xxx. 809 2-picoline condenses with acetaldehyde in the presence of warm aqueous sodium hydroxide to form 2-propenylpyridine. 1995 Independent 3 Oct. (Suppl.) 15/4 This [sc. chopping an onion] releases enzymes which take part in complex biochemical reactions. One of these produces..propenyl sulphuric acid. This is a very volatile irritant. This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022). < n.1867
随便看	tile-draining tile-earth tile-field tile-fish tile-floored tile-hanging tile-hat tile-hatted tile-hung tile-kiln tile-laths tile-layer tile-like tile-lined throughdevilled throughdraught throughdrive througher throughest throughfall throughfang throughfast throughfeed throughfere throughficche