Indian Forest Service (Mains), Chemistry optional · 2022 · Paper II

Q2(e). Deuterium and hydrolysis rate

5 marks
Topic: Reaction mechanisms
Question only

Question

Compare the hydrolysis of (CH₃)₂CHBr and (CD₃)₂CHBr in water.

Model answer

The free solution for 2022 answers questions 1, 3, 5, 7 and 8, the ones picked in its time plan. This part is not answered on the site yet. New answers are announced on Telegram.

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Topic notes: methods of studying mechanisms (isotopic labelling, crossover, trapping, kinetic isotope effect, kinetic and thermodynamic control), with every Civil Services, IFoS and Geo-Scientist PYQ →

Coverssecondary kinetic isotope effectβ-deuterium isotope effecthyperconjugationSN1 hydrolysisisopropyl bromide

All parts of Question 2

2(a) Two eliminations from a meso dibromide10 marks
2(b) Favorskii rearrangement of a dibromoketone10 marks
2(c) Rearrangement of a bornane alcohol10 marks
2(d) Claisen rearrangement of an allyl vinyl ether5 marks
2(e) Deuterium and hydrolysis rate5 marks