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Question

The product of the following reaction gave 6 line $^{13}C$ NMR spectrum with peaks at $\delta$ 175, 52, 50,
46, 37, 33 ppm. The structure of the product is

The correct answer is

To solve this question, we need to identify the product of the reaction based on the given 13C NMR spectrum data and possible structures. The NMR peaks are at δ 175, 52, 50, 46, 37, and 33 ppm.

  1. The peak at δ 175 ppm is characteristic of a carbonyl group C=O, usually found in esters, acids, or amides.
  2. The remaining peaks are in the range 30-50 ppm indicating carbon atoms in aliphatic environments, often seen in alkyl chains or saturated carbon structures.

The given reaction involves a ketone functionality, apparent from the chemical conditions and the corresponding NMR peak at 175 ppm.

The structure of the product should be analyzed for:

  1. Presence of a carbonyl group (peak at δ 175 ppm).
  2. Aliphatic carbon environment (remaining peaks).

After examining the options, the following product matches the NMR data:

Explanation of Alignment:

  1. The structure has a carbonyl carbon, aligned with δ 175 ppm peak.
  2. The rest of the structure consists of carbons that match the δ 52, 50, 46, 37, and 33 ppm NMR peaks, which are typical for saturated or aliphatic carbons.

Therefore, this structure aligns perfectly with the NMR data, confirming it as the correct product of the reaction.

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Important Questions from Organic Transformations

  1. The major products X and Y in the following reaction sequence are 

  2. The following conversion is an example of 

  3. The major product formed in the reaction given below is

  4. In the following reaction 

    the major product [X] is

  5. In the following reaction 

    the major product [X] is

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