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Question

In which of the following reaction cyanide will be obtained as a major product?


A
PhO||CCH3(i)LiAlH4(ii)H3O+
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B
PhO||CNH2NaOHBr2
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C
PhO||CNH2P4O10
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D
PhO||COHSOCl2NH3
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Solution

The correct option is B $$Ph-\overset{O}{\overset{||}{C}}-NH_2\overset{P_4O_{10}}{\rightarrow}$$
$$\Rightarrow$$ In general,an alkyl or aryl amide reacts with $${ P }_{ 4 }{ O }_{ 10 }$$ to give the corresponding Nitrile/cyanide.
$$\Rightarrow$$ Here, Benzamide would give benzo-nitrite.
$${ P }_{ 4 }{ O }_{ 10 }$$ acts as a dehydrating agent .

1086337_993144_ans_3db009c17413482d92accdb56223abec.png

Chemistry

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