name this ketone (2 points). * 2 points\na. 4 - ethyl - 3,4 - dimethylheptan - 2 - one\nb. 4 - ethyl - 4,5…

name this ketone (2 points). * 2 points\na. 4 - ethyl - 3,4 - dimethylheptan - 2 - one\nb. 4 - ethyl - 4,5 - dimethylheptan - 6 - one\nc. 4 - ethyl - 3,4 - dimethylheptan - 2 - ol\nd. 4 - ethyl - 4,5 - dimethylheptan - 6 - ol

name this ketone (2 points). * 2 points\na. 4 - ethyl - 3,4 - dimethylheptan - 2 - one\nb. 4 - ethyl - 4,5 - dimethylheptan - 6 - one\nc. 4 - ethyl - 3,4 - dimethylheptan - 2 - ol\nd. 4 - ethyl - 4,5 - dimethylheptan - 6 - ol

Answer

Brief Explanations:

  1. First, identify the longest carbon - chain containing the carbonyl group of the ketone. Here, the longest chain has 7 carbon atoms (heptane).
  2. The carbonyl group (C=O) in a ketone is given the lowest possible number. So, the carbonyl carbon is the 2nd carbon.
  3. Then, identify and number the substituents. There is an ethyl group at the 4th carbon and two methyl groups at the 3rd and 4th carbons.
  4. The suffix for a ketone is "-one", while "-ol" is for an alcohol. So, the correct name is 4 - ethyl - 3,4 - dimethylheptan - 2 - one.

Answer:

A. 4-ethyl-3,4-dimethylheptan-2-one