The correct order of reactivity towards the electrophilic substitution of the compounds aniline $$(I)$$, benzene $$(II)$$ and nitrobenzene $$(III)$$ is:
Nitro group is an electron withdrawing group. It removes electron density from aromatic nucleus.
Thus, the reactivity of nitrobenzene towards electrophilic aromatic substitution reaction is less.
Amino group is an electron releasing group. They increase the electron density on benzene ring.
Thus, aniline is more reactive towards electrophilic aromatic substituion reaction than benzene.
Hence, the correct order of reactivity towards the electrophilic substitution of the compounds, aniline $$(I)$$, benzene $$(II)$$, nitrobenzene $$(III)$$ is $$I > II > III$$.
When semicarbazide reacts with a ketone(or aldehyde) to form semicarbazone. Only one nitrogen atom of semicarbazide acts as a nucleophile and attack the carbonyl carbon of the ketone. The product of the reaction consequently is $${ R }_{ 2 }C=N-NH-CO{ NH }_{ 2\\ }$$ rather than $${ R }_{ 2 }C=NCONH-{ NH }_{ 2 }$$. What factor account for the fact that two nitrogen atoms of semicarbazide are relatively non nucleophilic?
The correct order of reactivity towards the electrophilic substitution of the compounds aniline (I) benzene (II) and nitrobenzene (III) is
The carbylamine reaction is:
Give one chemical test to distinguish between the following pairs of compounds. (i) Methylamine and dimethylamine (ii) Secondary and tertiary amines (iii) Ethylamine and aniline (iv) Aniline and benzylamine (v) Aniline and N-methylaniline.
Account for the following: (i) pKb of aniline is more than that of methylamine. (ii) Ethylamine is soluble in water whereas aniline is not. (iii) Methylamine in water reacts with ferric chloride to precipitate hydrated ferric oxide.
Primary and secondary amines react with acid chloride or acid anhydride to form:
Following reaction gives two products. $$\displaystyle { CH }_{ 3 }{ CH }_{ 2 }{ NH }_{ 2 }\xrightarrow { ({ CH }_{ 3 }CO{ ) }_{ 2 }O,\ heat }A+B$$ Write the structures of the products formed.
(A) is
Give the structures of $$A,B$$ and $$C$$ in the following reaction: $${ CH }_{ 3 }COOH\xrightarrow [ \Delta ]{ { NH }_{ 3 } } A\xrightarrow [ ]{ { Br }_{ 2 }+KOH } B\xrightarrow [ ]{ CH{ Cl }_{ 3 }+NaOH } C$$
Ethylamine reacts with acetyl chloride to form: