Which ketone has a total of 10 carbons?
- heptyl propyl ketone
- dipentyl ketone
- butyl hexyl ketone
- butyl pentyl ketone
Answer:
Butyl pentyl ketone is the only ketone with a total of 10 carbons. For each ketone, one alkyl group is on one side of the carbonyl and the other group is on the other side of the carbonyl. So, butyl is an alkyl group with 4-carbons on one side of the carbonyl, pentyl is an alkyl group with 5-carbons on the other side of the carbonyl, and there is 1 carbon on the carbonyl group (C=O). Thus, 4+5+1 = 10 total carbons. All of the other ketones have a total of 11 carbons. (Heptyl propyl ketone: 7+3+1=11 carbons; Dipentyl ketone = 5+5+1 = 11 carbons; and Butyl hexyl ketone = 4+6+1 = 11 carbons.)