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Ketones
- They are Carbon Compounds attached to CO (Ketone group)
- They are represented by ‘none’.
- Examples Propanone, Butanone are Ketones.
|
Number of Carbon Atoms |
Alkane Name |
Ketone Names |
|
1 |
Methane |
|
|
|
CH 4 |
- |
|
2 |
Ethane |
|
|
|
C 2 H 5 |
- |
|
3 |
Propane |
Propanone |
|
|
C 3 H 8 |
C 3 H 6 0 |
|
4 |
Butane |
Butanone |
|
|
C 4 H 10 |
C 4 H 8 0 |
|
5 |
Pentane |
Pentanone |
|
|
C 5 H 12 |
C 5 H 10 O |
|
6 |
Hexane |
Hexanone |
|
|
C 6 H 14 |
C 6 H 12 0 |
Note:
- There should be at least 3 carbon atoms to form Ketone
- It is because the ketone group (-CO) always appears in the middle of the carbon chain.
- It is surrounded by at least 1 carbon atom on each side.
Naming of different Ketones:
Step 1
We take Parent alkane by seeing number of carbon atoms
(If 3 carbon atoms, it is Prop, if 4 carbon atoms, we use But)
Step 2
We use the suffix like 'one' for (CO) group .
Example
- If we have to Name CH 3 COCH 3 ,
- It has 3 carbon atoms, it means it is 'Prop'
Since it has (CO) attached, we use 'one' suffix . Hence we get Propanone. Hence, there are a total of at least 3 carbon atoms.(One of CO group and other 2 of surrounding carbon atoms)
