Molecular orbitals diagrams of hexacyanoferrate(III) and hexafluoroferrate(III)

Molecular Orbital diagram for [Fe(CN)6]3- and [FeF6]3- complexes

1. Molecular Orbital diagram for [Fe(CN) 6 ] 3- and [FeF 6 ] 3- complexes Dr. Mithil Fal Desai Shree Mallikarjun and Shri Chetan Manju Desai College Canacona Goa

2. a 1g , t 1u, e g ( σ ) Ligand (CN) - group orbitals 6 x 2 = 12 e - σ M. O. diagram for [Fe(CN) 6 ] 3- complex t 2g, e g a 1g t 1u t * 1u a * 1g e * g e g a 1g t 1u Δ o t 2g Metal (Fe) orbitals Fe 3+ →[ Ar ] 3d 5 , 4s 5e - t * 2g t 2g ( π *) t 2g ( π ) [Fe(CN) 6 ] 3- molecular orbitals (CN) - is π acceptor ligand Low spin Energy

3. t 2g, e g a 1g , t 1u, e g ( σ ) a 1g t 1u t * 1u a * 1g e * g e g a 1g t 1u Δ o t 2g Ligand (F - ) group orbitals 6 x 2 = 12 e - σ 3 x 2 = 6 e - π Metal (Fe) orbitals Fe 3+ →[ Ar ] 3d 5 , 4s 5e - t * 2g t 2g ( π ) M. O. diagram for [FeF 6 ] 3- complex t 2g ( π *) [Fe(F) 6 ] 3- molecular orbitals (F - ) is π donor ligand High spin Energy