Question

Define isomerism.

Answer 1

Isomerism

'iso' means same and ‘mers’ means made of the same parts.

Isomers are molecules with the same number and kinds of atoms but with different arrangements. Structural isomers have the same molecular formula but different structural formulas. Ethanol ($C_2{H}_{5}OH$) and Methoxymethane ($C_2{H}_{6}O$) are structural isomers.

Isomerism:

1. Structural Isomerism
   1. Chain Isomerism
   2. Position Isomerism
   3. Functional Isomerism
   4. Metamerism
2. Stereo Isomerism or Space Isomerism (Geometrical Isomerism)