alkylammoniumn.

Brit.

/ˌalkʌɪləˈməʊnɪəm/,

/ˌalkɪləˈməʊnɪəm/, U.S.

/ˌælkələˈmoʊniəm/

Origin: Formed within English, by compounding. Etymons: alkyl n., ammonium n.

Etymology: < alkyl n. + ammonium n.

Chemistry.

A cation which can be regarded as a derivative of ammonium (NH₄⁺) in which one or more hydrogen atoms (often, all four) have been replaced by alkyl groups. Usually attributive.

ΚΠ

1887 Jrnl. Amer. Chem. Soc. 9 132 This reaction..producing successively primary, secondary and tertiary amines and then alkyl ammonium salts.

1902 Jrnl. Chem. Soc. 82 i. 271 It is shown that alkylammonium salts of alkylated dithiocarbamic acids on oxidation with iodine..readily yield thiuram disulphides.

1955 B. C. L. Kemp Elem. Org. Chem. (new ed.) xii. 175 Just as ammonia in aqueous solution gives rise to ammonium hydroxide, so the amines form alkyl-ammonium hydroxides which are apparently much stronger bases than ammonium hydroxide.

1995 New Scientist 2 Dec. 42/3 In 1963, researchers..found that they could control the size and geometry of the zeolite pores by using an organic template of alkylammonium ions.

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

单词	alkylammonium
释义	alkylammoniumn. Brit. /ˌalkʌɪləˈməʊnɪəm/, /ˌalkɪləˈməʊnɪəm/, U.S. /ˌælkələˈmoʊniəm/ Origin: Formed within English, by compounding. Etymons: alkyl n., ammonium n. Etymology: < alkyl n. + ammonium n. Chemistry. A cation which can be regarded as a derivative of ammonium (NH₄⁺) in which one or more hydrogen atoms (often, all four) have been replaced by alkyl groups. Usually attributive. ΚΠ 1887 Jrnl. Amer. Chem. Soc. 9 132 This reaction..producing successively primary, secondary and tertiary amines and then alkyl ammonium salts. 1902 Jrnl. Chem. Soc. 82 i. 271 It is shown that alkylammonium salts of alkylated dithiocarbamic acids on oxidation with iodine..readily yield thiuram disulphides. 1955 B. C. L. Kemp Elem. Org. Chem. (new ed.) xii. 175 Just as ammonia in aqueous solution gives rise to ammonium hydroxide, so the amines form alkyl-ammonium hydroxides which are apparently much stronger bases than ammonium hydroxide. 1995 New Scientist 2 Dec. 42/3 In 1963, researchers..found that they could control the size and geometry of the zeolite pores by using an organic template of alkylammonium ions. This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021). < n.1887
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