Which of the following is the best method to prepare alkyl halides?
Correct answer: D. The reaction of alcohol with SOCl2 in the presence of a pyridine solvent
- A. The reaction of alcohol with HCI in the presence of catalyst ZnCl2
- B. The reaction of alcohol with PCI5
- C. The reaction of alcohol with PCI3
- D. The reaction of alcohol with SOCl2 in the presence of a pyridine solvent
Explanation
This method is commonly used to convert alcohols into alkyl chlorides and is known as Darzen's method. The reaction proceeds through an intermediate chlorosulfite ester. This method is generally applicable to primary and secondary alcohols and is the most suitable method. Therefore, option d is correct.
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About Alkyl Halides
Alkyl halides are named and related to their carbon-halogen structure, polarity and reactivity. The key reactions are nucleophilic substitution by SN1 and SN2 mechanisms and elimination by E1 and E2 mechanisms, including how substrate structure, nucleophile, base, solvent and temperature influence substitution versus elimination.
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