Deduce Type of Organic Chemistry Reaction

Here's the question for this week:

deduce type of organic chem reaction question

We have to deduce the type of reaction for each stage since all these reactions are not in syllabus.

This can be done by comparing molecular/structural formula of the reactants and products in detail.

Let's consider this step by step.

Step 1 - Oxidation

deduce type of organic chem reaction step 1

Notice this step involves losing 2 hydrogen.

Hence this step is oxidation, which is the loss of hydrogen, gain of oxygen or increase in oxidation state.

Check out how to calculate oxidation state of carbon in organic compounds.

Step 2 - Nucleophilic Addition

deduce type of organic chem reaction step 2

The reactants are ethanal (2 carbon) and ethanol (2 carbon) to form product with 4 carbons and 2 oxygen.

Therefore we can deduce oxygen in ethanol acts as a nucleophile and attacks carbonyl carbon in ethanal.

This results in an addition product, hence the type of reaction is nucleophilic addition.

Learn how to draw the mechanism of nucleophilic addition of carbonyl compounds.

Step 3 - Oxidation

deduce type of organic chem reaction step 3

This step is very similar to the first step where the reactant loses 2 hydrogen to form ester product.

Hence this step is oxidation.

Finally we can compare the options and determine the answer to this question is option B (nucleophilic addition).

deduce type of organic chem reaction answer

Topic: Introduction to Organic Chemistry, Organic Chemistry, A Level Chemistry, Singapore

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