Ch13_WS2
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Cambridge International AS and A Level Chemistry Original material © Cambridge University Press 2011 1
Worksheet 13.2
Isomers in organic chemistry
This question is about the hydrocarbons that have the molecular formula C5H10.
1 Define the term isomer. [2]
2 Five of the isomers of C5H10 are cyclic saturated hydrocarbons. Draw the skeletal formulae for these isomers and name each one. [10]
3 There are four structural isomers with the molecular formula C5H10 which are straightchain hydrocarbons. a Give the structural formulae of these isomers and name each one. [8] b One of these structural isomers exhibits cis–trans isomerism.
i Identify this isomer. [1] ii State the two properties of the isomer which mean that it can possess this type of
stereoisomerism. [2] iii Draw the displayed and skeletal formulae of these two stereoisomers. [4]
4 Cyclohexane has the displayed formula shown below.
Draw skeletal formulae for all the isomers of this molecule that have a cyclic component. [10]