Final answer:
There are four unique stereoisomers for 2-chloro-2,3-dimethylpentane.
Step-by-step explanation:
When drawing the unique stereoisomers for 2-chloro-2,3-dimethylpentane, we need to consider the arrangement of the substituents around the chiral center. The compound has two chiral centers, marked with an asterisk (*), because both the carbon bearing the chlorine group and the carbon bearing two methyl groups are bonded to four different groups. Thus, there are four possible stereoisomers:
2R,3R-2-chloro-2,3-dimethylpentane
2S,3S-2-chloro-2,3-dimethylpentane
2R,3S-2-chloro-2,3-dimethylpentane
2S,3R-2-chloro-2,3-dimethylpentane