Chemistry - Hydrocarbon Question with Solution | TestHub

Explanation Question: Question is asking about product $R_1\&R_2$ for given reactions.

Concept: This question is based on oxidation of Alkene.

Solution:

(1) Baeyer's reagent (cold alk. ${\mathrm{KMnO}}_4$ ) gives syn addition of two - OH group so it should be " ${\mathrm{R}}_1$ "

(2) Performic acid $(\mathbf{HCOOOH})$ reacts with an alkene to form an epoxide (via peracid epoxidation). On acidic hydrolysis, the epoxide ring opens by backside attack, leading to anti addition of two -OH groups.

Hence, the final product is a trans (anti) vicinal diol.