324375
Hoffmann bromamide degradation reaction is shown by
1 \(\mathrm{Ar}-\mathrm{NO}_{2}\)
2 \(\mathrm{Ar}-\mathrm{NH}_{2}\)
3 \(\mathrm{Ar}-\mathrm{CH}_{2} \mathrm{NH}_{2}\)
4 \(\mathrm{Ar}-\mathrm{CONH}_{2}\)
Explanation:
Hoffmann bromamide degradation reaction is given by Amide.
CHXII13:AMINES
324376
Gabriel phthalimide synthesis is used in the preparation of primary amines from phthalimide, which of the following reagent is not used during the process?
1 \(\mathrm{NaOH}\)
2 \(\mathrm{HCl}\)
3 \(\mathrm{KOH}\)
4 Alkyl halides
Explanation:
\(\mathrm{HCl}\) is not used in Gabriel Phthalimide synthesis.
KCET - 2017
CHXII13:AMINES
324377
Which among the following statements is \(\underline {{\rm{NOT}}} \) true about Gabriel phthalimide synthesis?
1 In this method formation of N-alkyl phthalimide is involved.
2 In this method sodiumphthalate is also obtained.
3 This method is useful for preparation of aromatic amines.
4 In this method potassium salt of phthalimide is formed as an intermediate product.
Explanation:
Aromatic amines cannot be prepared by Gabriel phthalimide synthesis because aryl halides do not undergo nucleophilic substitution with the anion formed by phthalimide.
MHTCET - 2021
CHXII13:AMINES
324378 Product A and B are :
1 \(\mathrm{Ph}-\mathrm{NH}_{2}\) and \(\mathrm{Ph}-\mathrm{ND}_{2}\)
2 \(\mathrm{Ph}-\mathrm{ND}_{2}\) and \(\mathrm{Ph}-\mathrm{NH}_{2}\)
3 Both \(\mathrm{Ph}-\mathrm{NH}_{2}\)
4 Both \(\mathrm{Ph}-\mathrm{ND}_{2}\)
Explanation:
Hoffmann bromamide reaction (for detail see mechanism)
324375
Hoffmann bromamide degradation reaction is shown by
1 \(\mathrm{Ar}-\mathrm{NO}_{2}\)
2 \(\mathrm{Ar}-\mathrm{NH}_{2}\)
3 \(\mathrm{Ar}-\mathrm{CH}_{2} \mathrm{NH}_{2}\)
4 \(\mathrm{Ar}-\mathrm{CONH}_{2}\)
Explanation:
Hoffmann bromamide degradation reaction is given by Amide.
CHXII13:AMINES
324376
Gabriel phthalimide synthesis is used in the preparation of primary amines from phthalimide, which of the following reagent is not used during the process?
1 \(\mathrm{NaOH}\)
2 \(\mathrm{HCl}\)
3 \(\mathrm{KOH}\)
4 Alkyl halides
Explanation:
\(\mathrm{HCl}\) is not used in Gabriel Phthalimide synthesis.
KCET - 2017
CHXII13:AMINES
324377
Which among the following statements is \(\underline {{\rm{NOT}}} \) true about Gabriel phthalimide synthesis?
1 In this method formation of N-alkyl phthalimide is involved.
2 In this method sodiumphthalate is also obtained.
3 This method is useful for preparation of aromatic amines.
4 In this method potassium salt of phthalimide is formed as an intermediate product.
Explanation:
Aromatic amines cannot be prepared by Gabriel phthalimide synthesis because aryl halides do not undergo nucleophilic substitution with the anion formed by phthalimide.
MHTCET - 2021
CHXII13:AMINES
324378 Product A and B are :
1 \(\mathrm{Ph}-\mathrm{NH}_{2}\) and \(\mathrm{Ph}-\mathrm{ND}_{2}\)
2 \(\mathrm{Ph}-\mathrm{ND}_{2}\) and \(\mathrm{Ph}-\mathrm{NH}_{2}\)
3 Both \(\mathrm{Ph}-\mathrm{NH}_{2}\)
4 Both \(\mathrm{Ph}-\mathrm{ND}_{2}\)
Explanation:
Hoffmann bromamide reaction (for detail see mechanism)
324375
Hoffmann bromamide degradation reaction is shown by
1 \(\mathrm{Ar}-\mathrm{NO}_{2}\)
2 \(\mathrm{Ar}-\mathrm{NH}_{2}\)
3 \(\mathrm{Ar}-\mathrm{CH}_{2} \mathrm{NH}_{2}\)
4 \(\mathrm{Ar}-\mathrm{CONH}_{2}\)
Explanation:
Hoffmann bromamide degradation reaction is given by Amide.
CHXII13:AMINES
324376
Gabriel phthalimide synthesis is used in the preparation of primary amines from phthalimide, which of the following reagent is not used during the process?
1 \(\mathrm{NaOH}\)
2 \(\mathrm{HCl}\)
3 \(\mathrm{KOH}\)
4 Alkyl halides
Explanation:
\(\mathrm{HCl}\) is not used in Gabriel Phthalimide synthesis.
KCET - 2017
CHXII13:AMINES
324377
Which among the following statements is \(\underline {{\rm{NOT}}} \) true about Gabriel phthalimide synthesis?
1 In this method formation of N-alkyl phthalimide is involved.
2 In this method sodiumphthalate is also obtained.
3 This method is useful for preparation of aromatic amines.
4 In this method potassium salt of phthalimide is formed as an intermediate product.
Explanation:
Aromatic amines cannot be prepared by Gabriel phthalimide synthesis because aryl halides do not undergo nucleophilic substitution with the anion formed by phthalimide.
MHTCET - 2021
CHXII13:AMINES
324378 Product A and B are :
1 \(\mathrm{Ph}-\mathrm{NH}_{2}\) and \(\mathrm{Ph}-\mathrm{ND}_{2}\)
2 \(\mathrm{Ph}-\mathrm{ND}_{2}\) and \(\mathrm{Ph}-\mathrm{NH}_{2}\)
3 Both \(\mathrm{Ph}-\mathrm{NH}_{2}\)
4 Both \(\mathrm{Ph}-\mathrm{ND}_{2}\)
Explanation:
Hoffmann bromamide reaction (for detail see mechanism)
324375
Hoffmann bromamide degradation reaction is shown by
1 \(\mathrm{Ar}-\mathrm{NO}_{2}\)
2 \(\mathrm{Ar}-\mathrm{NH}_{2}\)
3 \(\mathrm{Ar}-\mathrm{CH}_{2} \mathrm{NH}_{2}\)
4 \(\mathrm{Ar}-\mathrm{CONH}_{2}\)
Explanation:
Hoffmann bromamide degradation reaction is given by Amide.
CHXII13:AMINES
324376
Gabriel phthalimide synthesis is used in the preparation of primary amines from phthalimide, which of the following reagent is not used during the process?
1 \(\mathrm{NaOH}\)
2 \(\mathrm{HCl}\)
3 \(\mathrm{KOH}\)
4 Alkyl halides
Explanation:
\(\mathrm{HCl}\) is not used in Gabriel Phthalimide synthesis.
KCET - 2017
CHXII13:AMINES
324377
Which among the following statements is \(\underline {{\rm{NOT}}} \) true about Gabriel phthalimide synthesis?
1 In this method formation of N-alkyl phthalimide is involved.
2 In this method sodiumphthalate is also obtained.
3 This method is useful for preparation of aromatic amines.
4 In this method potassium salt of phthalimide is formed as an intermediate product.
Explanation:
Aromatic amines cannot be prepared by Gabriel phthalimide synthesis because aryl halides do not undergo nucleophilic substitution with the anion formed by phthalimide.
MHTCET - 2021
CHXII13:AMINES
324378 Product A and B are :
1 \(\mathrm{Ph}-\mathrm{NH}_{2}\) and \(\mathrm{Ph}-\mathrm{ND}_{2}\)
2 \(\mathrm{Ph}-\mathrm{ND}_{2}\) and \(\mathrm{Ph}-\mathrm{NH}_{2}\)
3 Both \(\mathrm{Ph}-\mathrm{NH}_{2}\)
4 Both \(\mathrm{Ph}-\mathrm{ND}_{2}\)
Explanation:
Hoffmann bromamide reaction (for detail see mechanism)
