Provide the enantiomer using method 2. (Hint: chiral center is circled in red.)

• A.
• B.
• C.
• D.

Answer: (B)

Verified step by step guidance

1. Identify the chiral center in the original molecule, which is the carbon atom circled in red. This carbon is attached to four different groups, making it a stereocenter.
2. List the four groups attached to the chiral center. In this case, the groups are: a methyl group (CH3), a hydrogen atom (H), a hydroxyl group (OH), and a carbon chain (the rest of the molecule).
3. To find the enantiomer using method 2, invert the configuration at the chiral center. This means swapping the positions of any two groups attached to the chiral center to create the non-superimposable mirror image.
4. Compare the original molecule and the candidate structures by checking the spatial arrangement of the four groups around the chiral center. The enantiomer will have the opposite configuration (R to S or S to R) but the same connectivity.
5. Select the structure that shows the inverted configuration at the chiral center, which is the enantiomer. This structure will have the same groups attached but arranged as the mirror image of the original.