Question

What is the relationship between trans-2-butene and cis-2-butene?
A.Constitutional isomers
B.Diastereomers
C.Identical molecules
D.Enantiomers

Answer 1

Hint:According to the question isomers are the molecules having identical molecular formula but with different arrangement of atoms in space. Due to this they may have different chemical and physical properties.

Complete step by step answer:
Diastereomers are stereoisomers that are not mirror images of one another and are non-super imposable on one another.

According to the diagram they are non super imposable on one another.cis-2- butene and trans-2- butene have similar chemical properties but different physical properties. Due to their different arrangements their properties change but their chemical formula is different. So according to the question cis-2-butene and trans-2-butene they are diastereomers.

Hence, option B is correct.

Note:
 Isomers are the molecules having identical molecular formula but with different arrangement of atoms in space. According to their arrangement their properties may change. Enantiomers are molecules that are mirror images of one another but they are non super imposable on one another. Constitutional isomers are the molecules that have the same molecular formula but different connectivity. The more carbon atoms a hydrocarbon has, the greater the number of isomers.
There are different types of isomers so you should have clear knowledge about it. Due to their arrangement their chemical and physical properties may change. Clear concept about their structure and their formation.