Which ion would you expect to have the largest crystal field splitting Δ? A)[Fe(CN)₆]^4- B)[Fe(CN)₆]^3- C)[Fe(H₂O)₆]²⁺ D)[Fe(H₂O)₆]³⁺

Question

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Strong field ligands, such as cyanide (CN-), produce larger crystal field splitting compared to weaker field ligands like water (H2O). Among the options, [Fe(CN)6]3- has cyanide ligands and the lowest oxidation state for Fe (Fe2+), which typically results in a larger splitting than in higher oxidation states due to less electron-electron repulsion.

Which Ion Would You Expect to Have the Largest Crystal