Home › NEET UG › Chemistry › Haloalkanes and Haloarenes › Which of the following reagents is preferred for…
Which of the following reagents is preferred for converting an alcohol R-OH into an alkyl chloride because the by-products (SO₂ + HCl) escape as gases, giving a pure product?
APCl₃
BSOCl₂ (thionyl chloride)
CHCl/ZnCl₂
DPCl₅
Answer & Solution
Correct answer: B. SOCl₂ (thionyl chloride)
**SOCl₂ is preferred**: R-OH + SOCl₂ → R-Cl + SO₂↑ + HCl↑. **Both by-products are gaseous → escape → pure alkyl chloride**. PCl₅/PCl₃ leave POCl₃/H₃PO₃ as liquid by-products that contaminate the product.
Related questions
With which two hydrogen halides is the peroxide effect not observed?Addition anti to Markovnikov rule is known as the peroxide or:Who framed the rule for adding HBr to unsymmetrical alkenes, in 1869?An intermediate conformation between eclipsed and staggered is called:Eclipsed and staggered conformations are represented by Newman and:Across all conformations, what stays the same?How many conformations can an alkane have by rotation about single bonds?Spatial arrangements interconverted by rotation about a single bond are called: