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

isopropylidene n.

Brit.

/ˌʌɪsə(ʊ)prəʊˈpʌɪlᵻdiːn/

/ˌʌɪsə(ʊ)prəʊˈpɪlᵻdiːn/

U.S.

/ˌaɪsoʊˌproʊˈpɪlᵻˌdin/

the bivalent radical (CH₃)₂C=, frequently introduced into compounds by reaction with acetone.

ΘΚΠ

the world > matter > chemistry > organic chemistry > hydrocarbons > [noun] > hydrocarbon radicals > bivalent radicals

ethylene1853

ethylidene1859

propylidene1876

pentamethylene1887

vinylidene1898

isopropylidene1900

1900 E. F. Smith tr. V. von Richter Org. Chem. (ed. 3) II. 495 The condensation of the same oxime in the presence of ketones or aldehydes gives rise to isopropylidene and benzylidene methyl isoxazolons, (C₄H₃NO₂):C(CH₃)₂[etc.].

1932 H. Pringsheim Chem. Monosaccharides & Polysaccharides ii. 31 Into the hexoses and pentoses there can be introduced two isopropylidene remainders.

1967 R. J. McIlroy Introd. Carbohydrate Chem. v. 52 This displacement of the ring has led to the employment of isopropylidene derivatives in the synthesis of reference compounds of the furanose type.

单词	isopropylidene
释义	> as lemmas isopropylidene isopropylidene n. Brit. /ˌʌɪsə(ʊ)prəʊˈpʌɪlᵻdiːn/ , /ˌʌɪsə(ʊ)prəʊˈpɪlᵻdiːn/ , U.S. /ˌaɪsoʊˌproʊˈpɪlᵻˌdin/ the bivalent radical (CH₃)₂C=, frequently introduced into compounds by reaction with acetone. ΘΚΠ the world > matter > chemistry > organic chemistry > hydrocarbons > [noun] > hydrocarbon radicals > bivalent radicals ethylene1853 ethylidene1859 propylidene1876 pentamethylene1887 vinylidene1898 isopropylidene1900 1900 E. F. Smith tr. V. von Richter Org. Chem. (ed. 3) II. 495 The condensation of the same oxime in the presence of ketones or aldehydes gives rise to isopropylidene and benzylidene methyl isoxazolons, (C₄H₃NO₂):C(CH₃)₂[etc.]. 1932 H. Pringsheim Chem. Monosaccharides & Polysaccharides ii. 31 Into the hexoses and pentoses there can be introduced two isopropylidene remainders. 1967 R. J. McIlroy Introd. Carbohydrate Chem. v. 52 This displacement of the ring has led to the employment of isopropylidene derivatives in the synthesis of reference compounds of the furanose type. extracted from iso-comb. form < as lemmas
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> as lemmas