Question:medium

Identify D in the following sequence of reactions:
sequence

Updated On: Jan 13, 2026
  • n-propyl alcohol
  • isopropyl alcohol
  • propanal
  • propionic acid
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The Correct Option is A

Solution and Explanation

Solution 86
This reaction sequence proceeds as follows:
1. Formation of A (Grignard Reagent): Ethanol is converted to ethyl iodide via reaction with red phosphorus and iodine. Subsequently, ethyl iodide reacts with magnesium in dry ether to yield ethylmagnesium iodide (A), a highly reactive Grignard reagent.
2. Formation of B (Addition to Aldehyde): Ethylmagnesium iodide (A) undergoes addition to formaldehyde (HCHO), forming a magnesium alkoxide intermediate (B). This reaction elongates the carbon chain.
3. Formation of C (Acidification): Acidification of intermediate (B) protonates the alkoxide, resulting in propanol (C).
4. Formation of D: Propan-1-ol (n-propyl alcohol) is the final product, with no further reaction occurring.
Conclusion: The primary product, D, is n-propyl alcohol.

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