acetamiden.

Brit.

/əˈsiːtəmʌɪd/,

/əˈsɛtəmʌɪd/, U.S.

/əˈsɛdəˌmaɪd/,

/ˌæsəˈtæˌmaɪd/

Forms: 1800s– acetamid, 1800s– acetamide.

Origin: Formed within English, by compounding; partly modelled on a German lexical item, and partly modelled on a French lexical item. Etymons: aceto- comb. form, amide n.

Etymology: < aceto- comb. form + amide n., after German Acetamid (1849 or earlier) and its model French acétamide (J. Dumas et al. 1847, in Comptes rendus hebd. de l'Acad. des Sci. 25 657).

Chemistry.

1. A white crystalline solid with an aroma of mice, used in organic synthesis and (when melted) as a solvent and plasticizer. Also called ethanamide.Acetamide is the amide of acetic acid. Formula: CH₃CONH₂.

ΚΠ

1851 G. E. Day tr. K. G. Lehmann Physiol. Chem. I. 36 Acetamide [Ger. Acetamid], treated with caustic potash, yields ammonia.

1866 H. E. Roscoe Lessons Elem. Chem. xxxii. 290 Acetamide is a colourless solid, fusing at 78°, and boiling at 222°.

1877 H. Watts Fownes's Man. Elem. Chem. II. 379 Acetamide..crystallizes in long needles.

1904 Science 19 Aug. 251/1 Water rendered optically clear was not affected by the addition of urea, acetamid, methyl or ethyl alcohol.

1955 B. C. L. Kemp Elem. Org. Chem. (new ed.) xi. 159 With bromine, acetamide undergoes substitution in the amino-group, giving aceto-bromoamide, from which methylamine (CH₃.NH₂) is easily prepared.

1999 M. Pooley & J. Lomax Real Cidermaking xii. 87 A generally regarded offensive taint of mice due to the formation of ethanamide (formerly acetamide) can occur in some ciders.

2. A substitute derivative of acetamide, esp. any of those in which substitution occurs on the nitrogen atom.

ΚΠ

1918 Jrnl. Amer. Chem. Soc. 40 1731 With alcohols, keten gives esters of acetic acid; with amines, acetamides are formed.

1964 Radiation Res. 22 253 In this study, ten amides, including formamides, acetamides, and anilides, have been irradiated.

1994 Amer. Jrnl. Agric. Econ. 76 588/2 Most herbicides used in the Philippines are acetamides, and unprotected use of these chemicals is known to cause skin problems.

This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021).

单词	acetamide
释义	acetamiden. Brit. /əˈsiːtəmʌɪd/, /əˈsɛtəmʌɪd/, U.S. /əˈsɛdəˌmaɪd/, /ˌæsəˈtæˌmaɪd/ Forms: 1800s– acetamid, 1800s– acetamide. Origin: Formed within English, by compounding; partly modelled on a German lexical item, and partly modelled on a French lexical item. Etymons: aceto- comb. form, amide n. Etymology: < aceto- comb. form + amide n., after German Acetamid (1849 or earlier) and its model French acétamide (J. Dumas et al. 1847, in Comptes rendus hebd. de l'Acad. des Sci. 25 657). Chemistry. 1. A white crystalline solid with an aroma of mice, used in organic synthesis and (when melted) as a solvent and plasticizer. Also called ethanamide.Acetamide is the amide of acetic acid. Formula: CH₃CONH₂. ΚΠ 1851 G. E. Day tr. K. G. Lehmann Physiol. Chem. I. 36 Acetamide [Ger. Acetamid], treated with caustic potash, yields ammonia. 1866 H. E. Roscoe Lessons Elem. Chem. xxxii. 290 Acetamide is a colourless solid, fusing at 78°, and boiling at 222°. 1877 H. Watts Fownes's Man. Elem. Chem. II. 379 Acetamide..crystallizes in long needles. 1904 Science 19 Aug. 251/1 Water rendered optically clear was not affected by the addition of urea, acetamid, methyl or ethyl alcohol. 1955 B. C. L. Kemp Elem. Org. Chem. (new ed.) xi. 159 With bromine, acetamide undergoes substitution in the amino-group, giving aceto-bromoamide, from which methylamine (CH₃.NH₂) is easily prepared. 1999 M. Pooley & J. Lomax Real Cidermaking xii. 87 A generally regarded offensive taint of mice due to the formation of ethanamide (formerly acetamide) can occur in some ciders. 2. A substitute derivative of acetamide, esp. any of those in which substitution occurs on the nitrogen atom. ΚΠ 1918 Jrnl. Amer. Chem. Soc. 40 1731 With alcohols, keten gives esters of acetic acid; with amines, acetamides are formed. 1964 Radiation Res. 22 253 In this study, ten amides, including formamides, acetamides, and anilides, have been irradiated. 1994 Amer. Jrnl. Agric. Econ. 76 588/2 Most herbicides used in the Philippines are acetamides, and unprotected use of these chemicals is known to cause skin problems. This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021). < n.1851
随便看	pumicetopped pumiciform pumicing pumicite pumicites pumicose pumicous pumil pumilio pummel pummeled pummeling pummelled pummelling pummelo pummelos pummels pummet pummy pump pump and dump pump attendant pump barrel pump boat pump bolt