Asked in NUMS 2019 (cancelled sitting) 2019Moderate

Classify this alkyl halide:

Correct answer: A. 1o alkyl halide

  • A. 1o alkyl halide
  • B. 2o alkyl halide
  • C. 3o alkyl halide
  • D. 4o alkyl halide

Explanation

An alkyl halide is classified based on the number of carbon atoms attached to the carbon atom bearing the halogen. In this case, there is only one carbon atom attached to the carbon atom bearing the halogen (-CH2-Cl), making it a 1°alkyl halide. The presence of a benzene ring does not affect the classification of the alkyl halide.

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About Nomenclature, Structure and Reactivity

Alkyl halides are named by selecting the longest carbon chain and locating the halogen substituent, while their structures are classified as primary, secondary or tertiary. Their reactivity includes nucleophilic substitution and elimination, with the behaviour of leaving groups and the distinction between SN1 and SN2 mechanisms linked to substrate structure.

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