CAIE A Level Chemistry 9701 · An introduction to organic chemistry
The molecular formula represents an alkene, but-2-ene (), while represents a chloroalkane, 2-chlorobutane (). Compare the structural features that cause but-2-ene to exhibit geometric (cis/trans) isomerism and 2-chlorobutane to exhibit optical isomerism.
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Compare means: Give similarities or differences between two things, and say which side each point belongs to. Write each point as a pair, for example: A is X, whereas B is Y. Two separate descriptions rarely earn the marks.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.