Noun
aldehyde- Any of a large class of reactive organic compounds (R·CHO) having a carbonyl functional group attached to one hydrocarbon radical and a hydrogen atom
Read full definition at wiktionary.org
...The word aldehyde seems to have arisen from alcohol dehydrogenated. In the past, aldehydes were sometimes named after the corresponding alcohols, for example, vinous aldehyde for acetaldehyde. (Vinous is from Latin vinum = wine (the traditional source of ethanol), cognate with vinyl.) Read full entry
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- 1.Aldehyde - Wikipedia, the free encyclopedia
- An aldehyde is an organic compound containing a terminal carbonyl group. ... The aldehyde group is also called the formyl or methanoyl group. ...
- http://en.wikipedia.org/wiki/A
ldehyde
- 2.aldehyde: Definition from Answers.com
- aldehyde ( ) n. Any of a class of highly reactive organic chemical compounds obtained by oxidation of primary alcohols, characterized by the common
- http://www.answers.com/topic/a
ldehyde
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How would find out if cinnamon How would you find out if
cinnamon aldehyde is a tannin?
Or if someone knows- is
cinnamon aldehyde a Tannin?
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You can see it comparing the structure formulas: Cinnamaldehyde ( (E)-3-phenylprop-2-enal ) is - as the name says - an aldehyde with the characteristic H - C = O - group: http://en.wikipedia.org/wiki/C innamaldehyde Tannins is a group of polyphenols, basic unit gallic acid ( 3,4,5-hydroxybenzoic acid ) for hydrolyzable tannins with the characteristic COOH - group for organic acids and flavone ( with the characteristic C = O - group for ketones ) for condensed tannins : http://en.wikipedia.org/wiki/T annin example for condensed tannin OPC: http://en.wikipedia.org/wiki/P roanthocyanidin So cinnamon aldehyde isn`t a tannin. |
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What kinds of products are I'd like to know some products
that are used with the
chemical "aldehyde." Some that
I know of already are dyes,
perfumes, and medicines. What
else?
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An aldehyde is either a functional group consisting of a terminal carbonyl group or a compound containing a terminal carbonyl group. Common reactions aldehydes react with alcohols and an acid or base to a hemiacetal, the hemiacetal and alcohol and more acid catalyst further react to an acetal and water Simple hemiacetals are usually unstable, although cyclic ones such as glucose do exist. Acetals are stable, but these revert to the aldehyde in the presence of aqueous acid. Treating aldehydes with oxidizing agents such as potassium permanganate, nitric acid, chromium(VI) oxide or acidified potassium dichromate), will yield a carboxylic acid. Treating aldehydes with Tollens' reagent (which is prepared by adding a drop of sodium hydroxide solution into silver nitrate solution to give a precipitate of silver(I) oxide, and then adding just enough dilute ammonia solution to redissolve the precipitate in aqueous ammonia to produce [Ag(NH3)2]+ complex) will convert aldehydes to carboxylic acids without attacking carbon-carbon double-bonds. This reaction is also known as the silver mirror test. Aldehydes can react with water (under acidic or basic conditions) to form hydrates, R-C(H)(OH)(OH), although these are only stable when strong electron withdrawing groups are present, as in chloral hydrate. The mechanism is identical to hemiacetal formation. Aldehydes can react with HCN to form cyanohydrins, R-C(H)(OH)(CN). Treating an aldehyde with a Grignard reagent can yield an alcohol with a substituted group from the Grignard reagent. Treating aldehydes with NH3 derivatives (like NH2OH, H2NNH2, 2,4-dinitrophenylhydrazine) will result in the formation of an oxime or hydrazone. This is classed as an addition-elimination reaction or addition-condensation reaction. If the simple hydrazone (RCH=NHNH2) of an aldehyde is heated with a base such as KOH, the terminal carbon is fully reduced via the Wolff-Kishner reaction to a methyl group. The Wolff-Kishner reaction may be performed as a one-pot reaction, giving the overall conversion RCH=O → RCH3. Reaction of aldehydes with reducing agents such as magnesium gives diols in a Pinacol coupling reaction The Wittig reaction takes aldehydes to alkenes and the Corey-Fuchs reaction takes aldehydes to alkynes both with a triphenylphosphine reagent. The Corey-Chaykovsky reagent is a sulfonium ylide which convert aldehydes to epoxides. Examples of Aldehydes: Methanal (Formaldehyde) Ethanal (Acetaldehyde) Propanal Butanal Pentanal Glucose Benzaldehyde |
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What class of organic compound What class of organic compound
hydrolyzes in aqueous acid to
produce an aldehyde and an
alcohol?
a) acetal
b) imine
c) ester
d) anhydride
e) amide
Stupid lectures gave us a test
with content we havent learnt
yet, any feedback and help
would be appreciated!
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a) Acetal ester, carboxylic anhydride, and amide would be hydrolized to carboxylic acid. Imine would be hydrolized to an amine if I'm not mistaken only acetal would be hydrolized to produce an aldehyde and two molecule of alcohol |
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