question_answer

The absolute configuration of the following:

A)  2S, 3R                  

B)         2S, 3S  

C)         2R, 3S                  

D)         2R, 3R

Correct Answer: B

Solution :

Various enantiomers of 2, 3-dichloropentene are represented as follows:                                               (mirror images are not super imposable) Absolute configuration \[NOCl\] \[NC{{l}_{3}}\] \[{{N}_{2}}{{O}_{4}}\] \[N{{H}_{3}}\] S or sinister (left) is used for counterclockwise configuration. R or rectus (right) is used for clockwise configuration.