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Slide 1

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Aldehydes and ketones are compounds
that contain a carbon atom linked by a
double bond to an oxygen atom. This is
called the carbonyl group.…read more

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Slide 3

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Examples of · Examples of Ketones
Aldehydes are: are:
· Benzenal (C6H5CHO) · Propanone (CH3COCH3)
· Methanal (CH2O) · Butanone
(CH3COCH2CH3)…read more

Slide 4

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For aldehydes the · For ketones the suffix is ­
suffix is ­al one
· Replace the last `e' · Replace the the last `e' with
of a alkyl chain with the number the carbonyl is
­al. on, then ­one.
· E.g. · E.g.
Propane Propanal Pentane Pent-2-one
But-2-ene Butenal Hex-2-ene Hex-2-en-4-one…read more

Slide 5

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Smaller Aldehydes and Ketones are soluble in water
because the lone electron pairs on the oxygen in the
carbonyl group form hydrogen bonds with the hydrogen
in the water molecules. As the chain length increases,
they become less soluble because the hydrocarbon `tail'
gets in the way.
· The longer the molecule the higher the boiling point
because there is a larger surface area and stronger
intermolecular forces between molecules.…read more

Slide 6

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Primary Alcohol + Oxidising Agent Aldehyde + Water
(Usually Potassium (Distilled off immediately
Dichromate) so not oxidised further)
Secondary Alcohol + Oxidising Agent Ketone + Water
CH3CH2CH(OH)CH3 + [O] CH3CH2COCH3 + H2O…read more

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