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UPSC Combined Geo-Scientist

Chemist

  • 3 descriptive papers
  • 200 marks each
  • 3 h per paper

Mains Paper I covers inorganic chemistry.

UPSC Combined Geo-Scientist, Mains · 2017 · Mains Paper I

Q8(a). Metal–metal bonds from electron counts

Question

Predict the number of metal-metal bonds present in the following organometallic compounds: (i) Ir₄(CO)₁₂ (ii) [(η⁵-C₅H₅)Fe(μ-CO)(CO)]₂.

Answer in brief

Ir₄(CO)₁₂ has six Ir–Ir bonds; the cyclopentadienyliron dimer has one Fe–Fe bond.

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CoversMetal–metal bonds from electron countsMetal carbonyl clusters

All parts of Question 8