The reaction described involves the formation of a hydrazone by the reaction of a carbonyl compound (an aldehyde or a ketone) with 2,4-Dinitrophenylhydrazine (2,4-DNP). This is a classic test for the presence of carbonyl compounds, where a yellow or orange precipitate forms due to the formation of the hydrazone derivative.
Now let's break the problem down:
Reactants:
Benzaldehyde (C₆H₅CHO): An aromatic aldehyde.
Formaldehyde (HCHO): The simplest aldehyde.
Reaction of Each Aldehyde with 2,4-DNP:
When benzaldehyde reacts with 2,4-DNP, it will form a yellow precipitate, which is the 2,4-DNP derivative of benzaldehyde.
When formaldehyde reacts with 2,4-DNP, it will form another 2,4-DNP derivative of formaldehyde.
Dehydration Reaction: The reaction between the carbonyl group (C=O) of the aldehyde and 2,4-DNP leads to the elimination of water (dehydration) and the formation of a hydrazone derivative.
Fractional Distillation: Fractional distillation is used to separate compounds based on their boiling points. Since the products are different organic compounds with varying structures, they will have different boiling points.
Products:
In this case, there will be two organic products after fractional distillation:
2,4-DNP derivative of benzaldehyde
2,4-DNP derivative of formaldehyde
These two compounds will have different physical properties (such as boiling points), which allows them to be separated by fractional distillation.
Thus, the answer is: Two organic products will be obtained after fractional distillation.
