UPSC Combined Geo-Scientist, Mains · 2023 · Mains Paper I

Q9(b). Wilkinson-catalysed alkene hydrogenation

10 marks
Topic: Organometallic compounds
Question only

Question

Explain the catalytic cycle of hydrogenation of olefins by Wilkinson catalyst.

Model answer

The free solution for 2023 answers questions 1, 3, 4, 7, 8 and 10, the ones picked in its time plan. Question 9 is answered in full in the Geo-Scientist Chemistry Paper I, 2021 to 2025 book, with every part of every paper.

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UPSC Combined Geo-Scientist (Main) Chemistry Paper I: Model Answers 2021 to 2025

All eleven questions of each paper, with the question printed above its answer
Titration, gravimetric and nuclear numericals worked with units; structures drawn
Topic-wise weightage and a topic-wise index

Printed copy Kindle edition Read sample pages

Topic notes: organometallics: 18-electron rule, oxidative addition, fluxional molecules and Wilkinson's catalyst, with every Civil Services, IFoS and Geo-Scientist PYQ →

CoversWilkinson's catalystcatalytic hydrogenationRhCl(PPh3)3oxidative additionmigratory insertionreductive elimination

All parts of Question 9

9(a) The 18-electron rule in metal carbonyls15 marks
9(b) Wilkinson-catalysed alkene hydrogenation10 marks
9(c) Preparation of Wilkinson’s catalyst5 marks