Step 1: Define Metamerism.
Metamerism is a phenomenon where compounds with the same molecular formula have different structural arrangements of atoms or groups. These compounds are known as metamers. The difference arises in the alkyl chains or groups attached to a functional group.
Step 2: Understand with an Example.
For example, in the case of ethers, metamerism can occur when the alkyl groups attached to the oxygen atom differ in structure, although both compounds have the same molecular formula.
Final Answer:
Metamerism refers to the phenomenon where isomers have the same molecular formula but different structural arrangements due to the position or nature of substituent groups.
Final Answer:
\[
\boxed{\text{Metamerism is the occurrence of isomers with the same molecular formula but different structural arrangements.}}
\]
