Which of the following order is correct in spectrochemical series of ligands? — Coordination Compounds Chemistry Question

💡 Solution & Explanation

Step 1: Recall that the spectrochemical series arranges ligands in order of increasing crystal field splitting energy (Δ_o). Step 2: Generally, halides are weak-field ligands (Cl^- < F^-), followed by oxygen-donor ligands (such as oxalate, C2O4^2-), and then strong nitrogen/carbon-donor ligands (NO2^- < CN^-). Step 3: Therefore, the correct order is Cl^- < F^- < C2O4^2- < NO2^- < CN^-, which matches option (a).