The reagent with which the following reaction | vedclass

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Question

(A) The reaction shows the removal of the diazonium group $(-N_{2}^{+}Cl^{-})$ and its replacement with a hydrogen atom $(H)$.This is a reductive deam

Vedclass · Accepted Answer

$H_{3}PO_{2}$

Vedclass · Answer

(A) The reaction shows the removal of the diazonium group $(-N_{2}^{+}Cl^{-})$ and its replacement with a hydrogen atom $(H)$.This is a reductive deamination reaction.$H_{3}PO_{2}$ (hypophosphorous acid) in the presence of water is the standard reagent used to reduce diazonium salts to the corresponding arene.The reaction is: $Ar-N_{2}^{+}Cl^{-} + H_{3}PO_{2} + H_{2}O \rightarrow Ar-H + N_{2} + H_{3}PO_{3} + HCl$.Therefore, the correct reagent is $H_{3}PO_{2}$.

The reagent with which the following reaction is best accomplished is:

Similar Questions

For the following diazonium ions,the order of reactivity towards diazo-coupling with phenol in the presence of dilute $NaOH$ is:
$(I)$ $p-Me_2N-C_6H_4-N_2^+$
$(II)$ $p-O_2N-C_6H_4-N_2^+$
$(III)$ $p-CH_3O-C_6H_4-N_2^+$
$(IV)$ $p-CH_3-C_6H_4-N_2^+$

Which of the following will give $N_2$ gas on treatment with nitrous acid?

$C_6H_5NH_2$ $\xrightarrow[0-5\,^{\circ}C]{HCl + NaNO_2} A$ $\xrightarrow{CuCN} B$ $\xrightarrow{H_2/Ni} C$ $\xrightarrow{HNO_2} D$
The structure of $D$ is

Which among the following molecules has the lowest $pK_b$ value?

Ethyl amine on acetylation gives

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