InterviewSolution
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InterviewSolution
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The reagent which does not give acid chloride on treating with a carboxylic acid isA. `PCl_(5)`B. `Cl_(2)`C. `SOCl_(2)`D. `PCl_(5)` |
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Answer» Correct Answer - B `PCl_(3) , PCl_(5) and SOCl_(2)` are used to replace3 -OH group of an alcohol or an acid by -Cl group `R-overset(O)overset(||)C-OH+PCl_(5) to R-overset(O)overset(||)C-Cl+POCl_(3)+HCl` `R-overset(O)overset(||)C-OH+SOCl_(2) to R-overset(O)overset(||)C-Cl+SO_(2)+HCl` When acid react with `Cl_(2)` in the presence of red phosphorus, `alpha`-chloroacid is obtained. (Hell. volharzd-Zelinsky reaction). `CH_(3)CH_(2)COOH+Cl_(2) overset("Red P") underset(Delta)tounderset(alpha-"chloropropioni acid") overset(Cl) overset(|)(CH_(3)CHCOOH)+HCl` |
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