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Chapter 1: Problem 82

Which of the following does not exhibit tautomerism?

Short Answer

Expert verified
A) Acetone B) Ethanal C) Acetaldehyde D) Propanone Based on the steps above, here is the short answer: Step 1: The structures of the given molecules are as follows: A) Acetone (CH3COCH3) B) Ethanal (CH3CHO) C) Acetaldehyde (CH3CH2CHO) D) Propanone (CH3CH2COCH3) Step 2: Evaluating each molecule for tautomerism: A) Acetone can undergo keto-enol tautomerism, as it has a keto-group and an alpha hydrogen. B) Ethanal can undergo keto-enol tautomerism, as it has a keto-group and an alpha hydrogen. C) Acetaldehyde can undergo keto-enol tautomerism, as it has a keto-group and an alpha hydrogen. D) Propanone has a ketone functional group, but there is no alpha hydrogen present. Step 3: Identify the molecule that does not exhibit tautomerism: Compound D) Propanone does not exhibit tautomerism as it does not fulfill the conditions for keto-enol tautomerism.

Step by step solution

01

Draw the structures of given molecules

First, we should draw the structures of the given molecules. This will help to visualize the atoms' configuration and identify the possibility of tautomerism.
02

Evaluate each molecule for tautomerism

Now, examine each molecule for the possibility of tautomerism, especially for keto-enol tautomerism. Look for the presence of a keto-group (C=O) and a hydrogen atom in the alpha position to the carbonyl group, which can be transferred to form an enol-group (C=C-OH).
03

Identify the molecule that does not exhibit tautomerism

After evaluating each molecule, identify the one that doesn't have structures that can undergo tautomerization or fulfill the conditions for keto-enol tautomerism. Please, provide the molecular choices to follow these steps and give a proper answer.

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