ans. is 2
Dear Student,
Diastereomers are a type stereoisomer which are not mirror images of each other and are non-superimposible.
All cis-trans isomers are diastereomers.
Taking example of cis-2-butene and trans-2-butene:
Both of these are non-superimposible, non mirror images of each other.
Thus, for the given compound, the pair of stereoisomers which are diastereomers are (R)-4-bromo-cis-2-hexene and (R)-4-bromo-trans-2-hexene.
Answer 2 is correct.
Regards
Diastereomers are a type stereoisomer which are not mirror images of each other and are non-superimposible.
All cis-trans isomers are diastereomers.
Taking example of cis-2-butene and trans-2-butene:
Both of these are non-superimposible, non mirror images of each other.
Thus, for the given compound, the pair of stereoisomers which are diastereomers are (R)-4-bromo-cis-2-hexene and (R)-4-bromo-trans-2-hexene.
Answer 2 is correct.
Regards