Question
Compounds with same molecular formula but differing in their structures are said to be structural isomers. What type of structural isomerism is shown by $\mathrm{CH}_3-\mathrm{S}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_3$ and
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Answer
The two isomers which differ in the position of the functional group on the carbon skeleton are called position isomers and the phenomenon is known as position isomerism. Thus, A and B may be regarded as position isomers but they are not considered as metamers since metamers are those isomers which have different number of carbon atoms on either side of the functional group. But here, the number of carbon atoms on either side of sulphur atom (functional group) is the same, i.e. 1 and 3.
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