See image — Haloalkanes and Haloarenes Chemistry Question

💡 Solution & Explanation

Concept: Hammond's Postulate states that a transition state is structurally most similar to the species (reactant, intermediate, or product) that is closest to it in energy on the reaction coordinate diagram. Step 1: Identify the energy levels from the diagram. T.S.2 is the highest energy transition state on the profile. It connects intermediate 1 (lower energy) to intermediate 2 (lower energy, but closer in energy to T.S.2 than intermediate 1 is). Step 2: Apply Hammond's Postulate. T.S.2 connects intermediate 1 on its left side and intermediate 2 on its right side. The question is which species T.S.2 is closer in energy to. From the diagram, intermediate 2 is at a higher energy level than intermediate 1, meaning intermediate 2 is closer in energy to T.S.2 than intermediate 1 is. Step 3: Because T.S.2 is closer in energy to intermediate 2 (the species immediately following it and at a relatively higher energy compared to intermediate 1), by Hammond's Postulate, T.S.2 is structurally most similar to intermediate 2. Step 4: Eliminate other options. - (a) intermediate 1: farther from T.S.2 in energy; incorrect. - (b) transition state 3: a different transition state, not adjacent in energy comparison; incorrect. - (d) product: far removed from T.S.2 in both position and energy; incorrect. Therefore, the correct answer is C.