Diazonium Salts

Question 1

Preparation of Benzenediazonium chloride

Answer 1

Aniline + HCl ——> Anilinium chloride

Anilinium chloride + HNO2 ——–> Benzenediazonium chloride + 2 H2O

Question 2

Preparation of Diazonium salts using nitrile esters

Answer 2

Nitrile ester + HCl + Aniline —-> benzenediazonium chloride + amyl alcohol + H2O

Question 3

BDC + H3PO2 + H2Oin the presence of cuprous ion as catalyst gives?

Answer 3

benzene + H3PO3 + N2 + HCl

Question 4

Aqueous solution of BDC boiled with few drops of H2SO4 gives?

Answer 4

Phenol + N2 + HCl

Question 5

Sandmeyer Reaction

Answer 5

BDC + Cu2Cl2/ HCl —–> Chlorobenzene + N2

Question 6

Gatterman reaction

Answer 6

BDC + Cu/HCl —–> Chlorobenzene + N2

Question 7

Balz-Schiemann reaction

Answer 7

BDC + HBF4 —-> BDTetrafluroborate + HCl —–> flurobenzene + N2 + BF3

Question 8

BDC + HBF4 ——> ? + HCl ——–> Cu + NaNO2 (heat) —–> ? + N2 + NaBF4

Answer 8

Benzenediazonium tetrafluoroborate , Nitrobenzene

Question 9

Coupling reaction with phenol

Answer 9

BDC + Phenol —– OH/(alkaline medium)/heat ——> p-hydroxyazobenzene

Question 10

Coupling reaction with aniline

Answer 10

BDC + Aniline —– H/(acidic medium)/heat ——> p-aminoazobenzene

Question 11

BDC heated with phenol in an alkaline medium gives?

Answer 11

p-hydroxyazobenzene

Question 12

BDC heated with aniline in an acidic medium gives?

Answer 12

p-aminoazobenzene

Question 13

A reaction that involves the replacement by a nitro group and liberates N2

Answer 13

BDC + HBF4 —(NaNO2/Cu)—-> Nitrobenzene

Question 14

Heating benzenediazonium tetrafluoroborate gives ?

Answer 14

Flourobenzene

Question 15

Aqueous solution of the diazonium salt heated with copper powder and corresponding halogen acid gives?

Answer 15

corresponding halobenzene

Question 16

A reaction which involves the replacement by Hydrogen

Answer 16

BDC + H3PO2 —–Cu——> Benzene + H3PO3