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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 · 2023 · Mains Paper I

Q4(a). Crystal-field assumptions and d-orbital splitting

Question

Enumerate the important assumptions of Crystal Field Theory. Draw crystal field splitting of d-orbitals in different geometries (Octahedral, Tetrahedral and Square-planar).

Answer in brief

CFT treats ligands electrostatically. Octahedral: t₂g below eg; tetrahedral: e below t₂; square planar: dx²−y² is highest.

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Coverscrystal field theoryCFT assumptionsd-orbital splittingoctahedral tetrahedral square planarΔo and Δt

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