Question

The compounds ${\mathrm{C}}_2{\mathrm{H}}_5{\mathrm{OC}}_2{\mathrm{H}}_5$ and ${\mathrm{CH}}_3{\mathrm{OCH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_3$ are:

• A. Metamers
• B. Chain isomers
• C. Geometrical isomers
• D. Conformational isomers

Answer 1

The correct option is A

Metamers

The explanation for correct answer:-

Option(A) Metamers:-

• The compounds ${\mathrm{C}}_2{\mathrm{H}}_5{\mathrm{OC}}_2{\mathrm{H}}_5$ (Diethyl ether) and ${\mathrm{CH}}_3{\mathrm{OCH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_3$(Methylpropylether) are metamers.
• These compounds are called metamers as they have the same molecular formula but differ in the nature of the alkyl groups.
• Usually, molecules having divalent oxygen atoms show metamerism.

The explanation for the incorrect answer:-

Option (B) Chain isomers:

• These are those which are different in the branching of a chain of hydrocarbon.
• This option is incorrect.

Option (C) Geometrical isomers :

• These are those which are formed by the difference of arrangements in space around an olefin.
• This is incorrect.

Option (D) Conformational isomers :

• These are interconvertible by rotations around a single bond.
• So this option is incorrect.

Hence option (A) metamers is correct.