Question

4. Consider the three elimination reactions 1 - 3 shown below. Select the product(s) that will be produced in each reaction from the list (P1 and/or P2 and/or P3), provided below. Of all possible products formed, choose the two correct labels for the products: (i) label all products as either "major" or "minor," and (ii) label all products as either "less stable" or "more stable" t-BuOK NaOH H2O reaction 1 reaction 2 reaction 3 List of products to consider: CORRECT ANSWER reaction 1: P1 (minor; more stable) + P3 (major, less stable) reaction 2: P1 (major, more stable) + P3 (minor, less stable) reaction 3: P1 (major, more stable) + P2 (minor, less stable) b) reaction 1: Pl (major, more stable) + P3 (minor, less stable) reaction 2: Pl (minor, more stable) + (major, less stable) reaction 3: P1 (major, more stable) + P2 (minor, less stable) reaction 1: P1 (major, less stable) + P3 (minor, more stable) reaction 2: P1 (minor, less stable) + P2 (major, more stable) reaction 3: P1 (major, more stable) + P3 (minor, less stable) reaction 1: P1 (major; more stable) + P3 (minor, less stable) reaction 2: Pl (major; more stable) + P3 (minor, less stable) reaction 3: Pl (major, more stable) + P2 (minor, less stable) reaction 1: Pl (minor; more stable) + P3 (major, less stable) reaction 2: Pl (major; more stable) + P3 (minor, less stable) reaction 3: P2 (major; more stable) + P3 (minor, less stable)

Answer 1

Option E

In Reaction 1: tBuOK is a bulky base and removes proton from less hindered side. Hence less substitited product is major.

In Reaction 2, more stable conjugate diene is major and more stable.

In Reaction 3: less substitited Alkene is major and less stable.