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Identify the compound that does not show chirality.

1. 1-chloro-2-methylpentane
2. 2-chloropentane
3. 1-chloropentane
4. 3-chloro-2-methylpentane

Correct answer: 1-chloropentane

Solution

1-chloropentane (ClCH2-CH2-CH2-CH2-CH3) has no stereocentre, so it is achiral. The other three each contain a carbon attached to four different groups and are therefore chiral.

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