Which of the above compounds form pairs of metamers?

1. CH3-CH2-CH2-CH2-OH

2.  

3.  

4.  

5. CH3-CH2-O-CH2-CH3

6.  CH3-O-CH2-CH2-CH3

7.  

 


Metamerism arises due to different alkyl chains on either side of the functional group in the molecule. In the given structures V and VI or VI and VII form a pair of metamers because they differ in carbon atoms on either side of the functional group, i.e., O-atom.