Question

4. Write the IUPAC name of the following:
CH
CH; -
CH,
C С
1
CH,
b. CH; - C=C - CH CH3
CH3
1
CH, - C - CH, CH, CH, CHO
1
CH3
d. CH3
1
CH3 - C - CH, CH3
1
CH3​

Answer 1

Answer:

Longest carbon chain has to be chosen such that the functional group has the lowest number.

So we start numbering from the carbon of aldehydic group (−CHO). Thus there are 5 carbon is the longest chain.

At C-2 ethyl group and at C-3 position methyl group is present. The suffix used for aldehydes is "al".

Therefore, the IUPAC name is: 2-Ethyl-3-methyl-pentanal.

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