R - CH 2- CH 2 OH can be converted into RCH 2 CH 2 COOH. The correct sequence of the reagents is

Question

R - CH 2- CH 2 OH can be converted into RCH 2 CH 2 COOH. The correct sequence of the reagents is (A) KCN and H + (B) PBr , KCN and H 2 (C) PBr 3, KCN and H + (D) HCN , PBr 3 and H +

Tardigrade Admin · Accepted Answer

R - CH2 - CH2OH xrightarrowPBr3R - CH2CH2Br xrightarrowKCN R - CH2CH2CN xrightarrow[H2O]H+ R - CH2CH2 -COOH This is called upgradation reaction.

Q. $R - C H_{2} - C H_{2} O H$ can be converted into $RC H_{2} C H_{2} COO H$ . The correct sequence of the reagents is

$K CN$ and $H^{+}$

$PB r, K CN$ and $H_{2}$

$PB r_{3}, K CN$ and $H^{+}$

$H CN, PB r_{3}$ and $H^{+}$

$R - C H_{2} - C H_{2} O H PB r_{3} R - C H_{2} C H_{2} B r K CN$

$R - C H_{2} C H_{2} CN H^{+} H_{2} O R - C H_{2} C H_{2} - COO H$

This is called upgradation reaction.

Q. R−CH2​−CH2​OH can be converted into RCH2​CH2​COOH. The correct sequence of the reagents is

KCN and H+

PBr,KCN and H2​

PBr3​,KCN and H+

HCN,PBr3​ and H+