Chemistry - Nomenclature Question with Solution | TestHub

The bridges are 4, 2 and 0 carbons: bicyclo[4.2.0]octane. Numbering starts at a bridgehead, goes round the longest bridge first, then the next.

The $\mathrm{C}{\mathrm{H}}_3$ groups take the lowest locants, 2 and 7.

Name: 2,7-dimethylbicyclo[4.2.0]octane.