Coordination Compounds: One-Page Formula Sheet

Coordination Compounds — formula sheet

Formulas

• Spectrochemical series: I⁻ < Br⁻ < Cl⁻ < F⁻ < OH⁻ < H₂O < NH₃ < en < CN⁻ < CO
• CFSE (octahedral) = (−0.4 t₂g + 0.6 e_g) Δₒ
• μ = √(n(n+2)) BM
• EAN = Z − oxidation state + 2 × CN

Key ideas

• Coordination number = number of donor atoms attached
• Strong-field ligands (CN⁻, CO) cause pairing
• Octahedral splitting Δₒ; tetrahedral Δₜ ≈ 4/9 Δₒ
• Geometrical and optical isomers depend on arrangement

Traps to avoid

• Naming ligands out of alphabetical order
• Forgetting pairing with strong-field ligands
• Miscounting isomers of [MA₂B₂] and [MA₃B₃]

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