aldehyde

An aldehyde is either a functional group consisting of a terminal carbonyl group or a compound containing a terminal carbonyl group. (Where -R represents the carbon chain.) Aldehyde - Structure. The aldehyde functional group is a carbon atom bonded to a carbonyl group and a hydrogen atom. Aldehyde - α carbon & α hydrogen. An α (alpha) carbon is a carbon adjacent to a carbonyl group. An α hydrogen is a hydrogen atom bonded to the α carbon. The pKa of an α ...

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Aldehyde - Structure

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aldehyde: Oceanography Dictionary - aldehyde

Definition and meaning of aldehyde:

aldehyde - an organic molecule containing a -COH group. It is a colorless volatile liquid, obtained from alcohol by oxidation. An example of these aromatic compounds is formaldehyde

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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aldehyde: Encyclopedia II - Aldehyde - Chemistry

Aldehyde - Preparation. There are three notable methods for preparing aldehydes: Reacting a primary alcohol with an oxidizing agent, Reacting an alkene (if there is a vinylic hydrogen) with ozone will cause the C=C bond to break yielding an aldehyde upon workup, in a process called ozonolysis. Reacting an ester with DIBAL-H can cause reduction, yielding an aldehyde. Reduction of an acid chloride ...

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Aroma compound - Compounds

aldehyde: Encyclopedia - Benzaldehyde

Infobox disclaimer and references Benzaldehyde (C6H5CHO) is a chemical compound consisting of a benzene ring with an aldehyde substituent. It is the simplest representative of the aromatic aldehydes and one of the most industrially used members of this family of compounds. At room temperature it is a colorless liquid with a characteristic and pleasant almond-like odor: benzaldehyde is an important component of the scent of almonds hence its typical odor. It can be extracted from a number of ...

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aldehyde: Encyclopedia - Anticonvulsant

The anticonvulsants, sometimes also called antiepileptics, belong to a diverse group of pharmaceuticals used in prevention of the occurrence of epileptic seizures. The goal of an anticonvulsant is to suppress the rapid and excessive firing of neurons that start a seizure. Failing this, a good anticonvulsant would prevent the spread of the seizure within the brain and offer protection against excitotoxic effects that can result in brain damage. An excellent anticonvulsant would have fe ...

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aldehyde: Encyclopedia - Vanillin

Vanillin, or 4-hydroxy-3-methoxybenzaldehyde, is an organic compound with the molecular formula C8H8O3. Its functional groups include aldehyde, ether, and alcohol. It is the primary component of the extract of the vanilla bean. Synthetic vanillin is used as a flavoring agent in foods, beverages, and pharmaceuticals. Natural vanilla extract is a mixture of several hundred different compounds. Artificial vanilla flavoring is a solution of pure vanillin, usually of synthetic origin. Because ...

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aldehyde: Encyclopedia - Ylide

An ylide is a neutral molecule with positive and negative charges on adjacent atoms. The most common ylides are phosphonium ylides, used in the Wittig reaction for double bond synthesis from carbonyl groups (C=O). The positive charge in these Wittig reagents is carried by a phosphorus atom with three phenyl substituents and one bond to a carbon bearing a negative charge and two substituents, commonly alkyl groups. Ylides can be 'stabilised' or 'non-stabilised'. Non-stabilised ylides react readily with both aldehydes and ketones wherea ...

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aldehyde: Encyclopedia - Cinnamaldehyde

Cinnamaldehyde General Physical Safety SI units were used where possible. Unless otherwise stated, standard conditions were used. Disclaimer and references Cinnamic aldehyde or cinnamaldehyde (more precisely trans-cinnamaldehyde, the only naturally-occurring form) is the chemical compound that gives cinnamon its spice. Cinnamaldehyde occurs naturally in a the bark of cinnamon trees and other species of the g ...

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aldehyde: Encyclopedia - Carbonyl

In organic chemistry, a carbonyl group is a functional group composed of a carbon atom double-bonded to an oxygen atom. The term carbonyl can also refer to carbon monoxide as a ligand in an inorganic or organometallic complex (e.g., nickel carbonyl); in this situation, carbon is triple-bonded to oxygen. A carbonyl group characterizes the following types of compounds (where -CO denotes a C=O carbonyl group): aldehyde- (R-CHO) ketone- (R-CO-R1) carboxylic acid- (R-COOH) ester- (R ...

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aldehyde: Encyclopedia - Acetaldehyde

Acetaldehyde, also known as ethanal, is a chemical compound, an aldehyde with formula CH3CHO and structure It is a highly reactive flammable liquid with a strong fruity smell. It melts at -123.5° C and boils at 21 °C. Acetaldehyde occurs naturally in ripe fruit, coffee, and fresh bread and is produced by plants as part of their normal metabolism. In the liver, the enzyme alcohol dehydrogenase converts ethanol into acetaldehyde, which is then further converted into the harmless acetic acid by acetaldehyde deh ...

aldehyde: Encyclopedia - Alcohol dehydrogenase

Alcohol dehydrogenases are a group of dehydrogenase enzymes that occur in many organisms and facilitate the conversion between alcohols and aldehydes or ketones. In humans and many other animals, they serve to break down alcohols which could otherwise be toxic; in yeast and many bacteria they catalyze the opposite reaction as part of fermentation. The EC number of alcohol dehydrogenases is EC 1.1.1.1; their CAS number is 9031-72-5. Alcohol dehydrogenase - In humans. In humans, the enzyme is contained ...

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aldehyde: Encyclopedia - Vaginal lubrication

Vaginal lubrication is the naturally produced lubricating fluid that reduces friction during sexual intercourse. Vaginal dryness is the condition where this lubrication is insufficient. Vaginal lubrication - Composition. The lubrication fluid contains water, pyridine, squalene, urea, acetic acid, lactic acid, complex alcohols and glycols, ketones, and aldehydes. The fluid is typically clear and more resembling of male pre-ejaculate then male ejaculate. It can vary in consistency, texture, color, and ...

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aldehyde: Encyclopedia - Dimethylformamide

For the floppy disk format, see Distribution Media Format Dimethylformamide is a clear liquid, miscible with water and majority of organic solvents. It is a common solvent that is often used in chemical reactions. Pure dimethylformamide is odorless while technical grade or degraded dimethylformamide often has a fishy smell due to dimethylamine impurities. Its name is derived from the fact that it is formamide (the amide of formic acid) with two methyl group substitutio ...

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aldehyde: Encyclopedia - Zaleplon

Zaleplon Zaleplon (Sonata®/Starnoc®) is a sedative/hypnotic, mainly used for insomnia. It is a nonbenzodiazepine hypnotic from the pyrazolopyrimidine class. Zaleplon - Chemistry. Zaleplon is a white to off-white powder that has very low solubility in water as well as low solubility in alcohol and propylene glycol. It has a partition coefficient in octanol/water is constant (log PC = 1.23) when the pH range is between 1 and 7. Zaleplon - Mode of actionIncluding:

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aldehyde: Encyclopedia II - Aldehyde - Structure

The aldehyde functional group is a carbon atom bonded to a carbonyl group and a hydrogen atom. Aldehyde - α carbon & α hydrogen. An α (alpha) carbon is a carbon adjacent to a carbonyl group. An α hydrogen is a hydrogen atom bonded to the α carbon. The pKa of an α hydrogen is 20. Aldehyde - Carbonyl group. The other molecules containing carbonyl group are: Ke ...

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