iononen.

Brit.

/ˈʌɪənəʊn/, U.S.

/ˈaɪəˌnoʊn/

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

Etymology: < German Ionon (F. Tiemann & P. Krüger 1893, in Berichte der Deutsch. Chem. Ges. 26 2693) < ancient Greek ἴον violet (probably, like classical Latin viola viola n.¹, a loan from a language of the Mediterranean) + German -on -one suffix. For the semantic motivation, see note at sense 1.

Chemistry.

1. Frequently with distinguishing Greek letter. Each of a number of fragrant unsaturated isomeric ketones which are products of the breakdown of carotenoids and occur naturally in some essential oils; spec. (more fully β-ionone) a compound that arises as a product of ψ-ionone (see sense 2) in the synthesis of vitamin A. Also: any substituted derivative of these compounds.The α- and β-ionones are used in perfumery for their odour of violets and roses. They are cyclic ketones, (CH₃)₃C₆H₆CH=CH·CO·CH₃, differing only in the position of the double bond in the —C₆H₆— ring. γ-Ionone has the double bond outside the ring in a methylene group.

ΘΚΠ

the world > physical sensation > smell and odour > fragrance > [noun] > fragrant substance or perfume > other substances used for

essence of mirbane1857

heliotropin1881

linalool1891

ionone1893

note1905

isolate1923

hydroxycitronellal1929

rush1977

the world > matter > chemistry > organic chemistry > ketones > [noun] > others

pyroacetic ether1810

pyroacetic spirit1810

pyroacetic acid1819

margarone1834

oleone1834

stearone1836

acetone1838

valerone1839

benzoin1863

acetophenone1871

anthrone1881

ionone1893

Michler's ketone1897

chalcone1899

butanone1902

butyrophenone1908

alkenone1945

tropolone1945

1893 Bull. Pharmacy 7 552/1 From citral, the specific constituent of lemon oil, he has obtained an isomeric body, called Ionone, which is almost identical in aroma with Irone.

1898 Jrnl. Chem. Soc. 74 i. 376 (title) Resolution of ionone into two structurally identical forms, α-ionone and β-ionone.

1929 Encycl. Brit. VIII. 721/1 Ionone, derived from citral isolated from oil of lemongrass,..is the basis of all violet scents, and perhaps the most important of all synthetic perfumes.

1962 E. T. Theimer et al. in Jrnl. Org. Chem. 27 635/2 We wish to report the isolation and characterization of pure γ-ionone..from commercial products.

2005 New Yorker 14 Mar. 84/3 The scent of freesia..is created by combining two simple molecules: beta-ionone and linalool, both synthetic.

2. In full ψ-ionone. An acyclic compound isomeric with α- and β-ionone which can be cyclized to form those compounds and is used in the synthesis of vitamin A. Also called pseudoionone.Systematic name: (3E,5E)-6,10-dimethylundeca-3,5,9-trien-2-one; C₁₃H₂₀O.

ΚΠ

1897 Jrnl. Chem. Soc. 72 i. 538 Ionone is..easily prepared by the action of sulphuric acid on ψ-ionone, the latter substance being produced from geranaldehyde by condensation with acetone.

1969 W. Templeton Introd. Chem. Terpenoids & Steroids iii. 46 Similarly ψ-ionone.., obtained by condensation of citral with acetone, cyclizes under acidic conditions to α- and β-ionones, which are found in Nature.

2003 C. S. Sell Fragrant Introd. Terpenoid Chem. viii. 261 Epoxidation of ψ-ionone..can be achieved selectively at the most electron rich double bond.

This entry has been updated (OED Third Edition, March 2012; most recently modified version published online March 2022).

单词	ionone
释义	iononen. Brit. /ˈʌɪənəʊn/, U.S. /ˈaɪəˌnoʊn/ Origin: A borrowing from German. Etymon: German Ionon. Etymology: < German Ionon (F. Tiemann & P. Krüger 1893, in Berichte der Deutsch. Chem. Ges. 26 2693) < ancient Greek ἴον violet (probably, like classical Latin viola viola n.¹, a loan from a language of the Mediterranean) + German -on -one suffix. For the semantic motivation, see note at sense 1. Chemistry. 1. Frequently with distinguishing Greek letter. Each of a number of fragrant unsaturated isomeric ketones which are products of the breakdown of carotenoids and occur naturally in some essential oils; spec. (more fully β-ionone) a compound that arises as a product of ψ-ionone (see sense 2) in the synthesis of vitamin A. Also: any substituted derivative of these compounds.The α- and β-ionones are used in perfumery for their odour of violets and roses. They are cyclic ketones, (CH₃)₃C₆H₆CH=CH·CO·CH₃, differing only in the position of the double bond in the —C₆H₆— ring. γ-Ionone has the double bond outside the ring in a methylene group. ΘΚΠ the world > physical sensation > smell and odour > fragrance > [noun] > fragrant substance or perfume > other substances used for essence of mirbane1857 heliotropin1881 linalool1891 ionone1893 note1905 isolate1923 hydroxycitronellal1929 rush1977 the world > matter > chemistry > organic chemistry > ketones > [noun] > others pyroacetic ether1810 pyroacetic spirit1810 pyroacetic acid1819 margarone1834 oleone1834 stearone1836 acetone1838 valerone1839 benzoin1863 acetophenone1871 anthrone1881 ionone1893 Michler's ketone1897 chalcone1899 butanone1902 butyrophenone1908 alkenone1945 tropolone1945 1893 Bull. Pharmacy 7 552/1 From citral, the specific constituent of lemon oil, he has obtained an isomeric body, called Ionone, which is almost identical in aroma with Irone. 1898 Jrnl. Chem. Soc. 74 i. 376 (title) Resolution of ionone into two structurally identical forms, α-ionone and β-ionone. 1929 Encycl. Brit. VIII. 721/1 Ionone, derived from citral isolated from oil of lemongrass,..is the basis of all violet scents, and perhaps the most important of all synthetic perfumes. 1962 E. T. Theimer et al. in Jrnl. Org. Chem. 27 635/2 We wish to report the isolation and characterization of pure γ-ionone..from commercial products. 2005 New Yorker 14 Mar. 84/3 The scent of freesia..is created by combining two simple molecules: beta-ionone and linalool, both synthetic. 2. In full ψ-ionone. An acyclic compound isomeric with α- and β-ionone which can be cyclized to form those compounds and is used in the synthesis of vitamin A. Also called pseudoionone.Systematic name: (3E,5E)-6,10-dimethylundeca-3,5,9-trien-2-one; C₁₃H₂₀O. ΚΠ 1897 Jrnl. Chem. Soc. 72 i. 538 Ionone is..easily prepared by the action of sulphuric acid on ψ-ionone, the latter substance being produced from geranaldehyde by condensation with acetone. 1969 W. Templeton Introd. Chem. Terpenoids & Steroids iii. 46 Similarly ψ-ionone.., obtained by condensation of citral with acetone, cyclizes under acidic conditions to α- and β-ionones, which are found in Nature. 2003 C. S. Sell Fragrant Introd. Terpenoid Chem. viii. 261 Epoxidation of ψ-ionone..can be achieved selectively at the most electron rich double bond. This entry has been updated (OED Third Edition, March 2012; most recently modified version published online March 2022). < n.1893
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