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The organic compound containing a formyl group,
is an aldehyde.
The general structure is
or R- CHO
where R = H, alkyl or aryl group.
Examples: H - CHO, methanal (formaldehyde),
CH3 - CHO, ethanal (acetaldehyde)
The organic compound containing a carbonyl group attached to two
hydrocarbon radicals (alkyl or aryl groups) is called a ketone.
Example: CH3 - CO - CH3, (propanone (acetone)),
CH3 - CO - CH2 - CH3, (2- butanone)
H - CHO
Formaldehyde (from formic acid)
CH3 - CHO
Acetaldehyde (from acetic acid)
CH3 - CO - CH3
Acetone (Dimethyl ketones)
CH3 - CH2 - CO - CH3
Ethyl methyl ketone
CH3 - CH2 - CH2 - COCH3
Methyl propyl ketone
2 - Pentanone
of Carbonyl Group
The >C = O group contains one s-bond and one p - bond. Here,
the carbon atom is sp2 hybridised. The carbonyl group always
undergoes nucleophilic addition reactions.