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Identify compounds A,B and C in the following sequence of reactions. (i) C_(6)H_(5)NO_(2)overset(Fe//HCl)(to)Aunderset(273K)overset(HNO_(2))(to)Bunderset(C_(6)H_(3)OH)(to)C (ii) C_(6)H_(5)N_(2)Cloverset(CuCN)(to)A overset(H_(2)"O"//H^(+))(to)Boverset(NH_(3))(to)C (iii) CH_(3)CH_(2)Ioverset(NaCN)(to)Aunderset("Partial hydrolysis")overset(OH^(-))(to)Boverset(NaOH+Br_(2))(to)C (iv). CH_(3)NH_(2)overset(CH_(3)Br)(to)Aoverset(CH_(3)COCl)(to)Boverset(B_(2)H_(6))(to)C (v) C_(6)H_(5)NH_(2) underset("pyridine")((CH_(3)CO)_(2)O)(to)Aunderset(H_(2)SO_(4)//288K)overset(HNO_(3))(to)Boverset(H_(2)O//H^(+))(to)C (vii) CH_(3)CH_(2)NCoverset(HgO)(to)Aoverset(H_(2)O)(to)Bunderset((ii)H_(2)O)overset((i)NaNO_(2)//HCl)(to)C |
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Answer» Solution :(i) `C_(6)H_(5)NO_(2)overset(Fe//HCl)(to)Aunderset(273K)overset(HNO_(2))(to)Boverset(C_(6)H_(5)OH)(to)C` `underset(("Nitrobenzene"))(C_(6)H_(5)NO_(2))overset(Fe//HCl)(to)underset((A))underset(("Aniline""))(C_(6)H_(5)NH_(2)) underset((or)NaNO_(2)//HCl)overset(HNO_(2)//273K)(to)`  (ii) `C_(6)H_(5)N_(2)Cloverset(CuCN)(to)A overset(H_(2)O//H^(+))(to)Boverset(NH_(3))(to)C` `underset(("Benzenediazonium chloride"))(C_(6)H_(5)N_(2)Cl)overset(CuCN)(to)underset((A))underset(("Cyanobenzene"))(C_(6)H_(5)CN)overset(H_(2)O//H^(+))(to)underset((B))underset(("Benzoic acid"))(C_(6)H_(6)COOH)overset(NH_(3)//Delta)(to)underset((C))underset(("Benzamide"))(C_(6)H_(5)CONH_(2))` (iii) `CH_(3)CH_(2)Ioverset(NaCN)(to)Aunderset("Partial hydrolysis")overset(OH^(-))(to)Boverset(NaOH+Br_(2))(to)C` `underset(("Ethyl iodide"))(CH_(3)CH_(2)I)underset(-NaI)overset(NaCN)(to)underset(("Ethyl cyanide"))(CH_(3)CH_(2)CN)underset(("Partial hydrolysis"))overset(OH^(-))(to)underset((B))underset(("Acetamide"))(CH_(3)-CONH_(2)) underset(("Hofmann bromamide REACTION"))overset(NaOH+Br_(2))(to)underset((C))underset(("Methylamine"))(CH_(3)NH_(2))` (IV)`CH_(3)NH_(2)overset(CH_(3)Br)(to)Aoverset(CH_(3)COCl)(to)B overset(B_(2)H_(6))(to)C` `underset(("Methyl amine"))(CH_(3)NH_(2))overset(CH_(3)Br)(to) underset((A))underset(("N,N-dimethyl amine"))((CH_(3))_(2)NH)overset(CH_(3)COCl)(to)underset((B)) underset(("N,N-dimethyl acetamide"))((CH_(3))_(2)N-COCH_(3)) overset(B_(2)H_(6))(to) underset(((C)2-"hydroxy ethan amine")) underset(("N,N-dimethyl")) underset(OH)underset(|)((CH_(3))_(2)N-CH)-CH_(3)` v. `C_(6)H_(5)NH_(2) underset("pyridine")overset((CH_(3)CO)_(2)O)(to)Aunderset(H_(2)SO_(4)//288K)overset(HNO_(3))(to)Boverset(H_(2)"O"//H^(+))(to)C`  vii. `CH_(3)CH_(2)NCoverset(HgO)(to)Aoverset(H_(2)O)(to)Bunderset((ii)H_(2)O)overset((i)NaNO_(2)//HCl)(to)C` `CH_(3)CH_(2)NCunderset(-Hg_(2)O)overset(2HgO)(to) CH_(3)-underset((A))underset(("Ethylisocyanate"))(-CH_(2)-N=C=)Ooverset(H_(2)O)(to)CH_(3)-underset((B)underset(("Ethylamine"))(CH_(2)-NH_(2))+CO_(2)underset((ii)H_(2)O)overset((i)NaNO_(2)//HCl)(to) underset((C))underset(("Ethanol"))(C_(2)H_(5)OH)` |
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