Which of the following is a correct IUPAC name?
A) 1-methylpropanal
B) 2-ethylpropanal
C) 2,2-dimethylpropanal
D) none of these

Question

Quizplus · Accepted Answer

According to IUPAC naming rules, the parent chain for aldehydes is the longest continuous chain that contains the aldehyde group. In this case, the longest chain is 3 carbons long and has two methyl groups attached to the second carbon. The aldehyde group is attached to the first carbon, so the correct IUPAC name is 2,2-dimethylpropanal. Choice A is incorrect because it has only one methyl group and therefore not the longest chain, and choice B is incorrect because it has an ethyl group instead of a methyl group.

Which of the Following Is a Correct IUPAC Name