NEET
- Exam
- NEET
- Subject
- Chemistry
- Chapter
- Carboxylic Acid Derivatives
NEET · Chemistry · Carboxylic Acid Derivatives
Why is thionyl chloride (SOCl 2 ) preferred for converting...
Why is thionyl chloride (SOCl2) preferred for converting carboxylic acids to acyl chlorides over PCl5 and PCl3?
Options
- AThionyl chloride is less expensive.
- BThionyl chloride produces fewer byproducts.
- CPCl5 and PCl3 are gaseous and escape the reaction mixture.
- DPCl5 and PCl3 are more reactive.
Correct answer
C. PCl5 and PCl3 are gaseous and escape the reaction mixture.
Step-by-step solution
Thionyl chloride (SOCl2) is preferred because PCl5 and PCl3, when used for the same reaction, produce gaseous byproducts that escape the reaction mixture, making it difficult to handle and purify the desired product.