英语词汇“ionone”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

ionone

/ˈʌɪənəʊn/

Chemistry

noun

1Frequently 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; specifically (more fully β-ionone) a compound that arises as a product of ψ-ionone in the synthesis of vitamin A.

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..

2In 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.

Systematic name: (3E,5E)-6,10-dimethylundeca-3,5,9-trien-2-one; C₁₃H₂₀O..

Origin

Late 19th century; earliest use found in Bulletin Pharmacy. From German Ionon from ancient Greek ἴον violet (probably, like classical Latin viola, a loan from a language of the Mediterranean) + German -on. For the semantic motivation, see note at sense 1.

单词	ionone
释义	ionone /ˈʌɪənəʊn/ Chemistry noun 1Frequently 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; specifically (more fully β-ionone) a compound that arises as a product of ψ-ionone in the synthesis of vitamin A. 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.. 2In 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. Systematic name: (3E,5E)-6,10-dimethylundeca-3,5,9-trien-2-one; C₁₃H₂₀O.. Origin Late 19th century; earliest use found in Bulletin Pharmacy. From German Ionon from ancient Greek ἴον violet (probably, like classical Latin viola, a loan from a language of the Mediterranean) + German -on. For the semantic motivation, see note at sense 1.
随便看	molester mole trap moletronics moley Mole–Dagbani molie molimen Molimo Molina, Alfred Molina, Mario José molinary molindone moline molinet molinete moling Molinia Molinism Molinist Molinistic molino molinological molinologist molinology discouraged