Advertisements
Advertisements
प्रश्न
Which of the following cannot be prepared by Sandmeyer’s reaction?
(i) Chlorobenzene
(ii) Bromobenzene
(iii) Iodobenzene
(iv) Fluorobenzene
Advertisements
उत्तर
(iii) Iodobenzene
(iv) Fluorobenzene
Explanation:
Chloro and bromo arenes are easily prepared by Sandmeyer’s reaction. Iodoarenes are prepared by simply warming the diazonium salt solution with aqueous KI solution.
Fluoroarenes are prepared by Balz-Schiemann reaction.
All other reagents give aniline.
APPEARS IN
संबंधित प्रश्न
Give the structures of A, B and C in the following reactions:
Write the structures of main products when benzene diazonium chloride `(C_6H_5N_2^(+)Cl^-)`reacts with the following reagents:
CuCN/KCN
Write the structures of main products when benzene diazonium chloride `(C_6H_5N_2^(+)Cl^-)`reacts with the following reagents:
H2O
Write the structures of main products when benzene diazonium chloride `(C_6H_5N_2^(+)Cl^-)`reacts with the following reagents:
CH3CH2OH
Give the structures of A, B and C in the following reaction:
The reaction \[\ce{Ar\overset{+}{N2}Cl- ->[Cu/HCl] ArCl + N2 + CuCl}\] is anmed as ______.
Arrange the following compounds in increasing order of dipole moment.
\[\ce{CH3CH2CH3, CH3CH2NH2, CH3CH2OH}\]
Give reasons to support the answer:
3-Hydroxy pentan-2-one shows positive Tollen’s test.
The IUPAC name of the following compound is:
\[\begin{array}{cc}
\ce{CH3}\phantom{..}\ce{OH}\phantom{.........}\\
|\phantom{......}|\phantom{...........}\\
\ce{CH3 - CH - CH - CH2 - COOH}\\
\end{array}\]
Which of the following is not correct?
In a set of reactions, nitrobenzene gave a product D. Identify the product D.
The conversion of benzene diazonium chloride to bromobenzene can be accomplished by ______.
Write the structures of A, B and C in the following reaction:
