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प्रश्न
Explain the following reaction with a suitable example.
Sandmeyer reaction
उत्तर
In this reaction, arene diazonium salts undergo a nucleophilic substitution reaction. The reaction involves displacement of the diazo group by – Cl/– Br/ –CN atom. The reaction can be represented as,
\[\ce{Ar - N^+_2X- ->[CuX/HX] Ar - X + N2 (X = -Cl, -Br)}\]
\[\ce{Ar - N^+_2X- ->[CuCN/KCN] Ar - CN + N2}\]
e.g. Preparation of cyanobenzene from benzene diazonium chloride.
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संबंधित प्रश्न
Write a short note on coupling reactions.
Answer the following
Complete the following reaction :
`"C"_6"H"_5"N"_2^+"Cl"^-` + C2H5OH →
The reaction in which diazonium salt is used
Write the use of aryl diazonium salts.
Explain the following reaction with a suitable example.
Gatterman reaction
Which of the following reaction of diazonium salt involves retention of diazonium group?
When a quaternary ammonium hydroxide is strongly heated, an alkene and a tertiary amine are formed as the products. This reaction is known as ____________.
The reagent used in Gatterman reaction is ____________.
Benzenediazonium chloride on reaction with 'X' gives benzene. Identify X.
Which of the following is a Gattermann reaction?
Replacement of diazo group by Cl using cuprous chloride is known as ____________.
Formation of p-hydroxyazobenzene from benzene diazonium chloride and phenol in mild alkaline medium is a ______.
Identify compound 'A' in the following reaction.
What is the product X obtained in the following reaction?
\[\ce{C6H5N2Cl ->[(i) HBF4, (ii) NaNO2/Cu][\Delta] X + N2 + NaBF4}\]
Identify product B in the following reaction.
\[\ce{C6H5N^+_2X^- ->[HBF4] A ->[NaNO2][Cu] B}\]
The reaction in which copper (I) salt is used to replace nitrogen in diazonium salt is called, ____________.
In the following reaction the reagent A is,
\[\ce{Ar - N^+_2 X^- ->[A] Ar - N^+_2 BF^-_4 ->[\Delta] Ar - F + BF3 + N2 ^}\]
Benzene diazonium chloride on reaction with ethanol forms ____________.
Fluorobenzene (C6H5F) can be synthesized in the laboratory ______.
