The GATE Grind

GATE Inorganic Chemistry: Organometallics: 18-Electron rule; metal-alkyl, metal-carbonyl, metal-olefin and metal-carbene complexes and metallocenes. Fluxionality in organometallic complexes. Types of organometallic reactions. Homogeneous catalysis – Hydrogenation, hydroformylation, methanol to acetic acid process, olefin metathesis and Wacker oxidation. Heterogeneous catalysis – Fischer-Tropsch reaction, Ziegler-Natta polymerization. – Previous Year Questions

14 GATE previous year questions on Organometallics: 18-Electron rule; metal-alkyl, metal-carbonyl, metal-olefin and metal-carbene complexes and metallocenes. Fluxionality in organometallic complexes. Types of organometallic reactions. Homogeneous catalysis – Hydrogenation, hydroformylation, methanol to acetic acid process, olefin metathesis and Wacker oxidation. Heterogeneous catalysis – Fischer-Tropsch reaction, Ziegler-Natta polymerization. (Inorganic Chemistry, Chemistry) with answers and explanations, from every paper.

  1. GATE 2026 CY Q15 (1 mark, Multiple choice) – The species that undergoes β-elimination is
  2. GATE 2026 CY Q17 (1 mark, Multiple choice) – The species which follows 18-electron rule is (en = ethylenediamine)
  3. GATE 2026 CY Q26 (1 mark, Multiple select) – The interconversion of oxidation states of metal(s) observed in Wacker process is(are)
  4. GATE 2026 CY Q41 (2 marks, Multiple choice) – The correct electronic configuration of central metal ion in ferrocene with z-axis passing through the centre of two C5H5 − rings and the metal ion is
  5. GATE 2025 CY Q21 (1 mark, Multiple select) – The Vaska’s complex trans-IrCl(CO)(PPh3)2 shows a band at 1967 cm-1 for the νCO stretching vibration in its infrared spectrum. The complex(es) that…
  6. GATE 2025 CY Q36 (2 marks, Multiple choice) – The reaction that proceeds through an oxidative addition followed by a reductive elimination is [Given: Atomic numbers Ni = 28, Ta = 73, Zr = 40, Pt =…
  7. GATE 2025 CY Q37 (2 marks, Multiple choice) – The homogeneous catalyst whose metal ion does NOT undergo either oxidation or reduction in any of the steps during the hydrogenation of terminal…
  8. GATE 2025 CY Q38 (2 marks, Multiple choice) – The given zirconocene compound, (5-Cp) 2ZrEt 2, when heated in the presence of an equimolar amount of PMe 3 results in the formation of a compound X…
  9. GATE 2025 CY Q39 (2 marks, Multiple choice) – The 1H NMR spectrum of the given iridium complex at room temperature gave a single signal at 2.6 ppm, and its 31P NMR spectrum gave a single signal at…
  10. GATE 2024 CY Q11 (1 mark, Multiple choice) – Among the following, the compound with the lowest CO stretching frequency is
  11. GATE 2024 CY Q31 (1 mark, Numerical answer) – The number of metal-metal bond(s) in the complex [(5-Cp)Mo(CO) 2] 2 is x and in [(5-Cp) 2Fe 2(CO) 3] is y. The value of x+y is . (Assume 18 electron…
  12. GATE 2024 CY Q38 (2 marks, Multiple choice) – The heptacity of allyl and Cp and the ligation mode of NO in the thermodynamically stable complexes [(x-allyl)Ru(CO) 2(NO)] and [(y-Cp)Ru(CO) 2(NO)],…
  13. GATE 2024 CY Q39 (2 marks, Multiple choice) – In the following reactions, the structures of I, II, and III, respectively, are
  14. GATE 2024 CY Q59 (2 marks, Numerical answer) – The turnover frequency (in h−1) of a reaction where 5 mol% of a catalyst is required for 90% conversion in 3 h is . (rounded off to the nearest…