Question

what is the name of this compound?

1. ch₃ - c - ch₂ - ch₂ - ch₃

2 - butanone
4 - pentanone
4 - butanone
2 - pentanone

Explanation:

• First, count the number of carbon atoms in the longest carbon - chain. Here, there are 5 carbon atoms, so the base name is pentan - (since it's a ketone, the suffix is - one).
• Then, number the carbon - chain to give the carbonyl carbon (\(C = O\)) the lowest possible number. The carbonyl carbon is the second carbon in the chain.

Answer:

2 - pentanone