Paper 1 October/November 2009 CHEMISTRY (9701/01) IGCSE
Structural isomerism and stereoisomerism should be taken into account when answering this question.
The structure of 3-methylcyclobutene is shown.
A mixture containing all stereoisomers of 3-methylcyclobutene is treated with HBr. This produces a mixture of isomeric bromomethylcyclobutanes.
How many stereoisomers does 3-methylcyclobutene have, and how many isomeric bromomethylcyclobutanes are present in the product mixture?