Which of the following ligands is most likely to form high spin complexes in octahedral fields?(a) Cl^–(b) OH^–(c) C2O4^–(d) CN^–This question was posed to me in exam.My question is taken from Bonding in Coordination Compounds in chapter Coordination Compounds of Chemistry – Class 12

Which of the following ligands is most likely to form high spin comple

1.	Which of the following ligands is most likely to form high spin complexes in octahedral fields?(a) Cl^–(b) OH^–(c) C2O4^–(d) CN^–This question was posed to me in exam.My question is taken from Bonding in Coordination Compounds in chapter Coordination Compounds of Chemistry – Class 12
Answer» Right option is (a) CL^– To elaborate: Cl- is the WEAKEST field ligand in the given options. The splitting field Δo is small and the energy separation between the eg and t2g ORBITALS are narrower. Hence, the electrons TEND to OCCUPY the eg orbitals easily and are likely to have a greater number of half-filled orbitals.

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