ketone

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ketone

(kē`tōn), any of a class of organic compounds that contain the carbonyl groupcarbonyl group
, in chemistry, functional group that consists of an oxygen atom joined by a double bond to a carbon atom. The carbon atom is joined to the remainder of the molecule by two single bonds or one double bond.
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, C=O, and in which the carbonyl group is bonded only to carbon atoms. The general formula for a ketone is RCOR′, where R and R′ are alkyl or aryl groups. The simplest ketone, where R and R′ are methyl groups, is acetoneacetone
, dimethyl ketone
, or 2-propanone
, CH3COCH3, colorless, flammable liquid. Acetone melts at −94.8°C; and boils at 56.2°C;. It is the simplest aliphatic ketone.
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; this is one of the most important ketones used in industry. Low-molecular-weight ketones are used chiefly as solvents. Ketones may be prepared by several methods, including the oxidation of secondary alcohols and the destructive distillation of certain salts of organic acids. Ketones are related to the aldehydesaldehyde
[alcohol + New Lat. dehydrogenatus=dehydrogenated], any of a class of organic compounds that contain the carbonyl group, , and in which the carbonyl group is bonded to at least one hydrogen; the general formula for an aldehyde is RCHO, where R is hydrogen
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 but are less active chemically.

ketone

[′kē‚tōn]
(organic chemistry)
One of a class of chemical compounds of the general formula RR′CO, where R and R′ are alkyl, aryl, or heterocyclic radicals; the groups R and R′ may be the same or different, or incorporated into a ring; the ketones, acetone, and methyl ethyl ketone are used as solvents, and ketones in general are important intermediates in the synthesis of organic compounds.

ketone

any of a class of compounds with the general formula RʹCOR, where R and Rʹ are alkyl or aryl groups
References in periodicals archive ?
51 u moles/L which might be due to the presence of two ketonic and one ether group relative to allopurinol, a reference standard having IC50 value of 6.
This method [64] tests for the presence of free carbonyl groups, of reducing sugars produced from starch fragmentation, as during the redox reaction between sugars (starch fragments) and silver nitrate, the sugars are turned to the oxidized form with more aldehydic and/or ketonic groups.
Most probably the ketonic and carbonyl groups of esters are responsible for such stabilization which is present in the clove buds Fig.
The absorption spectrum of free VBA reveals the maximum absorption at 260 nm with a shoulder at 275 nm, which are assigned to the [pi]-[pi]* transitions of ketonic form and enol form of free VBA in THF, respectively.
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s] C=O, 1658(m) v C=O ketonic, 1589(m) phenyl ring, 1502(s) phenyl ring, 1379(m) v C-N, 1300(m) [v.
MAJOR PRODUCTS: Heatset, coldset, sheetfed, news, publication gravure, UY/EB; process colors and Pantone colors; flush pigments for heatset and sheetfed inks; alkali blue flush including pourable, pumpable and dry, both red and green shades and extra red shade; UV/EB flushes; ketonic and phenolic resins.
The sample was also found to contain compounds of the ester, ketonic, ethereal and alcoholic functional groups.
In turn, these gases may react with atmospheric oxygen to give a thin layer of polymer containing ketonic functional groups.
It was noted that the reaction is faster for the aldehydic carbohydrates as compared to the ketonic.
12) studied the thermal oxidation of PVB degradation and found that butyraldehyde (butanal) and water were the most abundant volatile products, with small amounts of alcoholic, ketonic, and carboxylic acid compounds.