Which of the following have the S configuration?

Question

Quizplus · Accepted Answer

Based on the stereocenter numbering system used in organic chemistry, stereocenter 1 and stereocenter 2 have the same group with the highest priority (Cl in both cases) in the front, and the second highest priority group (Br and C, respectively) on the dashed line pointing towards the back. Therefore, they have the S configuration. Stereocenter 3, on the other hand, has the group with the highest priority (Br) on the dashed line pointing towards the front, therefore having the R configuration.

Which of the Following Have the S Configuration