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AS and A Level
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The molecule CHBrClF exhibits optical isomerism. Draw the 3D displayed formulae of both optical isomers.

Important Questions on Introduction to Organic Chemistry

HARD
AS and A Level
IMPORTANT
Which one of the following can have optical isomers? Draw the displayed formula of your chosen answer and clearly label its chiral centre.
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Consider the two molecules below. Compare the number of chiral centres in each molecule and clearly label any chiral centres.

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Look at the structure of the cholesterol molecule. How many chiral centres are present in a cholesterol molecule?

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Write an equation to show the homolytic fission of Cl-Cl in a chlorine molecule Cl2.
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AS and A Level
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Write an equation to show the heterolytic fission of C-Cl in a chloromethane molecule. Include a curly arrow in your answer.
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Which one of the following species is likely to act as a nucleophile? Explain your answer.
MEDIUM
AS and A Level
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Which one of the following species is likely to act as a electrophile? Explain your answer.
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Which of these carbocations is most likely to form as an intermediate in an organic reaction? Justify your answer.