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Question: R—CH<sub>2</sub>—CH<sub>2</sub>OH can be converted in R—CH<sub>2</sub>CH<sub>2</sub>COOH. The correc...

R—CH2—CH2OH can be converted in R—CH2CH2COOH. The correct sequence of reagents is

A

PBr3, KCN, H+

B

PBr3, KCN, H2

C

KCN, H+

D

HCN, PBr3, H+

Answer

PBr3, KCN, H+

Explanation

Solution

RCH2CH2OH PBr3\xrightarrow { \mathrm { PBr } _ { 3 } } RCH2CH2Br KCN\xrightarrow { \mathrm { KCN } } RCH2CH2CN H2O/H+\xrightarrow { \mathrm { H } _ { 2 } \mathrm { O } / \mathrm { H } ^ { + } } RCH2CH2COOH