Question

Consider the following reaction sequence. What are A and B?

• A. \(CH_3CH=O, CH_3CH=O\)
• B. \((CH_3)_2C=O, CH_2=O\)
• C. \((CH_3)_2C=O, CH_3CH=O\)
• D. \(CH_3CH=O, CH_2=O\)

Hint:

Understanding organic reaction mechanisms can greatly assist in predicting the products of complex transformations. For oxidation reactions, identify the functional groups formed and consider the cleavage of bonds.

Answer 1

The Correct Option is B

Step 1: Oxidation of 2-methylpropane

The starting material in the reaction sequence is 2-methylpropane (\( (CH_3)_2CH_2 \)). Upon oxidation, 2-methylpropane can first form an intermediate ketone, acetone (\( (CH_3)_2C=O \)), as a result of the loss of two hydrogen atoms from the primary carbon.

Step 2: Further Oxidation and Cleavage

After the formation of acetone, the next step involves further oxidation, which breaks the bond between the two carbons, resulting in the formation of formaldehyde (\( CH_2=O \)).

Step 3: Identifying Products A and B

• A is acetone (\( (CH_3)_2C=O \)) because it is the ketone formed during oxidation.
• B is formaldehyde (\( CH_2=O \)) because it is the product formed after further oxidation and cleavage.

 

Thus, the correct answer is: \[ \boxed{(2) \ (CH_3)_2C=O, CH_2=O} \]