Question
Question: The reaction \[C{H_3}CN + 4[H]\xrightarrow{{Na/{C_2}{H_5}OH}}C{H_3}C{H_2}N{H_2}\] is known as: A. ...
The reaction CH3CN+4[H]Na/C2H5OHCH3CH2NH2 is known as:
A. Hofmann’s bromamide reaction
B. Mendius reaction
C. Perkin’s reaction
D. Sabatier reaction
Solution
We have to remember that the reduction reaction is a type of chemical reaction, which involves the gaining of electrons by one of the atoms involved in the reactants. The carbon atom that gains bonds to less electronegative elements, not all time but most commonly hydrogen. The oxidation state of the element that gains electrons is decreased.
Complete step by step answer:
Let us see the options one by one for which option is correct.
Hofmann’s bromamide reaction gives a primary amine
When amide is treated with bromine in an aqueous solution of sodium hydroxide the primary amine is called Hofmann’s bromamide reaction. The product amine formed in the reaction contains one carbon atom more than the parent compound.
General chemical reaction is
RCONH2+Br2+4NaOH→RNH2+Na2CO3+2NaBr+2H2O
Nitriles gives primary amine is a Mendius reaction
We need to know that the reduction reaction of nitriles (if a compound containing −C≡N functional group) with sodium (Na) in ethanol gives primary amine is called Mendius reaction.
The general chemical reaction is,
R−C≡N + 4[H] Na/C2H5OH R−CH2NH2
AlkylcyanidePrimaryamine
The product amine formed in the above reaction contains one carbon atom more than the parent compound.
Perkin’s reaction gives that gives an alpha, beta-unsaturated acid
It is a type of condensation reaction that gives an alpha, beta-unsaturated acid
through the aromatic aldehyde and an acid anhydride in the presence of base catalyst.
Perkin reaction is,