What is the expected order for increasing octahedral (Δ₀)crystal field splitting for the ligands I^-,F^-,H₂O,NH₃,en,CO? A)I^-

Question

What is the expected order for increasing octahedral (Δ₀)crystal field splitting for the ligands I^-,F^-,H₂O,NH₃,en,CO? A)I^- < F^- < H₂O < NH₃ < en < CO B)F^- < I^- < NH₃ < en < CO < H₂O C)I^- < F^- < H₂O < CO < NH₃ < en D)CO < en < NH₃ < H₂O < F^- < I^-

Quizplus · Accepted Answer

The order of increasing octahedral crystal field splitting generally follows the spectrochemical series, which ranks ligands from those that induce a weak field (small Δ) to those that induce a strong field (large Δ). In this series, I- and F- are weak field ligands, H2O and NH3 are intermediate, and en (ethylenediamine) and CO are strong field ligands. Thus, the correct order from weakest to strongest field is I- < F- < H2O < NH3 < en < CO.

What Is the Expected Order for Increasing Octahedral (Δ0)crystal Field

What Is the Expected Order for Increasing Octahedral (Δ₀)crystal Field