1. 6.6 Aldehydes and Ketones 6.6.1 Aldehyde Structures
LO: I understand the structure and nomenclature of aldehydes.

2. An alkanal (aldehyde) has a group at the end of the carbon chain.
carbonyl
Alkanals have the the functional group:
-CHO or
Example: C H O
CH3CH2CHO
propanal
LO: I understand the structure and nomenclature of alkanals.

3. 6.6.2 Alkanone Structures
LO: I understand the structure and nomenclature of alkanones.

4. An alkanone (ketone) has a carbonyl group within the carbon chain.
Alkanones have the the functional group: or
-COC-
Example:
CH3CH2COCH2CH2CH3
hexan-3-one
LO: I understand the structure and nomenclature of alkanones.

5. 6.6.3 Distinguishing Tests
LO: I know how to distinguish between alkanals and alkanones chemically.

6. Two carbonyl compounds, X and Y, are reacted with oxidising agents.
Reaction
with X
with Y
Acidified dichromate
Benedicts reagent
Tollen’s reagent
orange green
no reaction
blue orange
no reaction
colourless silver
no reaction
alkanal
From the results, compound X is an and compound Y is an
alkanone
LO: I know how to distinguish between alkanals and alkanones chemically.