Consider the following reaction: Identify the major organic...

The given reactant is 1-phenylpropene, which has the structure $\text{C}_6\text{H}_5-\text{CH}=\text{CH}-\text{CH}_3$.

The reagent $\text{KMnO}_4 / \text{H}^+, \Delta$ is a strong oxidizing agent that causes the oxidative cleavage of the carbon-carbon double bond.

During this reaction, the $\text{C}=\text{C}$ bond is completely broken. Each carbon atom of the double bond is oxidized to a carboxylic acid group.

The $\text{C}_6\text{H}_5-\text{CH}=$ fragment is oxidized to benzoic acid ($\text{C}_6\text{H}_5\text{COOH}$).

The $=\text{CH}-\text{CH}_3$ fragment is oxidized to ethanoic acid ($\text{CH}_3\text{COOH}$).

Therefore, the major organic products $X$ and $Y$ are benzoic acid and ethanoic acid.

Answer: Benzoic acid and ethanoic acid