- functional group
a group of atoms responsible for the characteristic behavior of the class of compounds in which the group occurs, as the hydroxyl group in alcohols.[1935-40]
* * *In molecules, any of numerous combinations of atoms that undergo characteristic chemical reactions themselves and in many cases influence the reactivity of the rest of the molecule.Organic compounds are often classified according to the functional groups they contain. Common functional groups include hydroxyl (―OH), in alcohols and phenols; carboxyl (―COOH), in carboxylic acids; carbonyl (―C=O), in aldehydes, ketones, amides, carboxylic acids, esters, and quinones; and nitro (―NO2) and amino (―NH2), in certain organic nitrogen compounds.
* * *any of numerous combinations of atoms that form parts of chemical molecules, that undergo characteristic reactions themselves, and that in many cases influence the reactivity of the remainder of the molecule. In organic chemistry the concept of functional groups is useful as a basis for classification of large numbers of compounds according to their reactions.Some of the common functional groups are hydroxyl, present in alcohols and phenols; carboxyl, present in carboxylic acids; carbonyl, present in aldehydes, ketones, and quinones; and nitro, present in certain organic nitrogen compounds.
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functional group — n a characteristic reactive unit of a chemical compound * * * a part of a molecule that gives it characteristic chemical properties, e.g., an aldehyde, alcohol, amine, carboxylic acid, ester, ether, or ketone group … Medical dictionary
functional group — Functional Group Функциональная группа Cтруктурный фрагмент молекулы, характерный для данного класса органических соединений и определяющий его химические свойства. Примеры функциональных групп: азидная, гидроксильная, карбонильная,… … Толковый англо-русский словарь по нанотехнологии. - М.
Functional group — For other uses, see Functional group (disambiguation) and Moiety (disambiguation). Benzyl acetate has an ester functional group (in red), an acetyl moiety (circled with green) and a benzyloxy moiety (circled with orange). Other divisions can be… … Wikipedia
functional group — func′tional group n. chem. a group of atoms responsible for the characteristic behavior of the class of compounds in which the group occurs, as the hydroxyl group in alcohols • Etymology: 1935–40 … From formal English to slang
functional group — noun Chemistry a group of atoms responsible for the characteristic reactions of a particular compound … English new terms dictionary
functional group — noun Date: 1906 a characteristic reactive unit of a chemical compound especially in organic chemistry … New Collegiate Dictionary
functional group — noun a) A specific grouping of elements that is characteristic of a class of compounds, and determines some properties and reactions of that class. b) A collection of organisms of specific morphological, physiological … Wiktionary
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