n-octane

2-methylheptane

3-methylheptane

4-methylheptane

2,2-dimethylhexane

2,3-dimethylhexane

2,4-dimethylhexane

2,5-dimethylhexane

3,3-dimethylhexane

3,4-dimethylhexane

3-ethylhexane

2,2,3-trimethylpentane

2,2,4-trimethylpentane

2,3,3-trimethylpentane

2,3,4-trimethylpentane

3-ethyl-2-methylpentane

3-ehtyl-3-methylpentane

مهندس محمد عبد العظيم هندسة الأزهر

Propane is not the parent chain. The parent chain is pentane. So 1-t-butyl-2-methylpropane is correctly named 2,2,4-trimethylpentane.

2+2, do you mean? its 4. if not, its 22.

2 2 4 Is 2 2 4

4