Question

GIVE THE IUPAC NAME OF (CH3)2CHCH=CHCHO

Answer 1

The IUPAC name of $(CH_{3} )_{2} CHCH=CHCHO$:

choose longest chain from the function group.

4-methyl-1-en-2-butanal

Answer 2

Answer:

4-methylpent-2-enal

Explanation:

1. Take the longest parent chain

5. 4. 3. 2. 1

(CH3)CHCH=CH CHO

|

CH3

2. 1st preference given to CHO

3. for 5 carbon chain word root is pent

4. on 4th position methyl group is attached and 'en ' is used as suffix for alkene which is on 2nd position

5. and 'al' used for CHO

then naming of this done as

4-methylpent-2-enal