Isomer and Naming According to IUPAC (1)

Meaning of structural isomerism

A phenomenon where a compound has the same molecular formula but with two or more different structural formulae

Ways for structural isomerism to occur

Chain isomerism and position isomerism

Meaning of chain isomerism

The isomers have different arrangements of carbon chains; either straight chain or branched chain

Meaning of position isomerism

The isomers have different positions of functional group on the same carbon chain

3-methylpentane

2-methylbutane

The isomers for hexane

2-methylpentane; 3-methylpentane; 2,3-dimethylbutane; 3,3-dimethylbutane

2,2-dimethylpropane

2,2-dimethylbutane

2,4-dimethylpentane