-CHO definition


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From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Aldehyde \Al"de*hyde\ ([a^]l"d[-e]*h[imac]d), n. [Abbrev. fr.
     alcohol dehydrogenatum, alcohol deprived of its hydrogen.]
     1. (Chem.) A colorless, mobile, and very volatile liquid
        obtained from alcohol by certain processes of oxidation.
        [1913 Webster]

     2. (Chem.) Any compound having the group {-CHO}. Methyl
        aldehyde, the simplest aldehyde, is more commonly called
        formaldehyde, {H-CHO}, and acetic aldehyde is now more
        commonly called {acetaldehyde}. The higher aldehydes may
        be solids. A {reducing sugar} typically contains the
        aldehyde group.
     Note: The aldehydes are intermediate between the alcohols and
           acids, and differ from the alcohols in having two less
           hydrogen atoms in the molecule, as common aldehyde
           (called also {acetaldehyde}, {acetic aldehyde} or
           {ethyl aldehyde}), {C2H4O}; methyl aldehyde (called
           also {formaldehyde}), {CH2O}.
           [1913 Webster +PJC]
     {Aldehyde ammonia} (Chem.), a compound formed by the union of
        aldehyde with ammonia.
        [1913 Webster]

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