Identify D in the following sequence of reactions:
- n-propyl alcohol
- isopropyl alcohol
- propanal
- propionic acid
The Correct Option is A
Solution and Explanation
This reaction sequence involves several steps:
1. Formation of A (Grignard Reagent): Ethanol reacts with red phosphorus and iodine to form ethyl iodide which then reacts with magnesium in dry ether to form ethyl magnesium iodide (A). This is a Grignard Reagent which is very reactive.
2. Formation of B (Addition to Aldehyde): Ethylmagnesium iodide (A) reacts with formaldehyde (HCHO) to form a magnesium alkoxide intermediate (B). This addition reaction results in an increase in the carbon chain.
3. Formation of C (Acidification): Acidification of (B) leads to the protonation of the alkoxide intermediate which yields propanol(C).
4. Formation of D: No further reaction occurs as we get propan-1-ol (n-propyl alcohol).
Conclusion: The major product D is n-propyl alcohol.
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