dienen.

Brit.

/ˈdʌɪiːn/, U.S.

/ˈdaɪˌin/

Etymology: < di- comb. form + -ene comb. form.

Chemistry.

Any organic compound containing two double bonds between carbon atoms.

ΚΠ

1917 Chem. Abstr. 11 3031 (title) The melting points of hydrocarbons, especially dienes, having a system of conjugated double bonds.

1929 Chem. Abstr. 23 3232 Dienes such as isoprene in relatively pure condition.

1961 L. F. Fieser & M. Fieser Adv. Org. Chem. v. 197 Butadiene is significantly more stable..than dienes with isolated (nonconjugated) double bonds.

Compounds

diene hydrocarbon n.

ΚΠ

1928 Chem. Abstr. 22 1144 (heading) Addition of ‘diene’ hydrocarbons.

diene synthesis n. an addition reaction in which two carbon atoms joined by a double or triple bond in an unsaturated compound become attached to the first and fourth carbon atoms of a conjugated diene, forming a ring of six carbon atoms in the resulting molecule; the Diels-Alder reaction.

ΘΚΠ

the world > matter > chemistry > organic chemistry > chemical processes or reactions > [noun] > addition > diene synthesis

diene synthesis1930

1930 Chem. Abstr. 24 356 (heading) The ‘diene-syntheses’. An ideal method for the synthesis of organic compounds.

1957 Encycl. Brit. I. 549/2 The diene synthesis consists essentially of the addition of substances containing two conjugate double bonds, such as the butadienes, to substances such as maleic acid or quinones.

diene value n. a number expressing the degree of unsaturation in fatty compounds.

ΚΠ

1936 Rep. Prog. Applied Chem. 433 Linseed oil itself shows a definite ‘maleic’ or ‘diene value’, equivalent to about 5–7% of conjugated triene glycerides.

This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2022).

单词	diene
释义	dienen. Brit. /ˈdʌɪiːn/, U.S. /ˈdaɪˌin/ Etymology: < di- comb. form + -ene comb. form. Chemistry. Any organic compound containing two double bonds between carbon atoms. ΚΠ 1917 Chem. Abstr. 11 3031 (title) The melting points of hydrocarbons, especially dienes, having a system of conjugated double bonds. 1929 Chem. Abstr. 23 3232 Dienes such as isoprene in relatively pure condition. 1961 L. F. Fieser & M. Fieser Adv. Org. Chem. v. 197 Butadiene is significantly more stable..than dienes with isolated (nonconjugated) double bonds. Compounds diene hydrocarbon n. ΚΠ 1928 Chem. Abstr. 22 1144 (heading) Addition of ‘diene’ hydrocarbons. diene synthesis n. an addition reaction in which two carbon atoms joined by a double or triple bond in an unsaturated compound become attached to the first and fourth carbon atoms of a conjugated diene, forming a ring of six carbon atoms in the resulting molecule; the Diels-Alder reaction. ΘΚΠ the world > matter > chemistry > organic chemistry > chemical processes or reactions > [noun] > addition > diene synthesis diene synthesis1930 1930 Chem. Abstr. 24 356 (heading) The ‘diene-syntheses’. An ideal method for the synthesis of organic compounds. 1957 Encycl. Brit. I. 549/2 The diene synthesis consists essentially of the addition of substances containing two conjugate double bonds, such as the butadienes, to substances such as maleic acid or quinones. diene value n. a number expressing the degree of unsaturation in fatty compounds. ΚΠ 1936 Rep. Prog. Applied Chem. 433 Linseed oil itself shows a definite ‘maleic’ or ‘diene value’, equivalent to about 5–7% of conjugated triene glycerides. This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2022). < n.1917
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