Question

question 13 (1 point)
the correct iupac name for the compound above is which of the following?
a) 2 - ethoxy - 5 - pentanone
b) 4 - ethoxypentanal
c) 3 - propoxypentanal
d) 5 - ol - 2 - ethylpentane ether

Explanation:

Step1: Identify the functional group and parent chain

The compound has an aldehyde group (\( -CHO \)) and an ether group (\( -OCH_2CH_3 \)). The aldehyde group has higher priority for numbering, so the parent chain is pentane (5 carbons) with the aldehyde at the end (so it's a pentanal).

Step2: Locate the ether substituent

The ether group (\( -OCH_2CH_3 \) is ethoxy) is on the 4th carbon of the pentanal chain. So the name is 4 - ethoxypentanal.

Step3: Eliminate other options

• Option a: Has a ketone group, but the compound has an aldehyde, so incorrect.
• Option c: The ether group is ethoxy, not propoxy, so incorrect.
• Option d: Incorrect functional group identification and naming convention.

Answer:

b) 4 - ethoxypentanal