Transcription of Chapter 20 - d-block metal chemistry - …
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Chapter 20 - d-block metal chemistry - …
1 Chapter 20 d- block metal chemistry :coordination complexesBonding: valence bond, crystal field theory, MO Spectrochemical seriesCrystal field stabilization energy (CFSE)Electronic SpectraMagnetic Propertiesfive d-orbitals and the shapes2 Hybridization schemes for the -bonding frameworks of different geometrical configurations Limitations of VB Theory3d4s4pVacant orbitals available to accept ligand electronsCr(III)3dd2sp3 Vacant orbitals available to accept ligand electronsFe(III)3dd2sp3 For Fe(III), the two d orbitals in the sp3d2hybrid orbitals would need to be from the 4d orbitals, which is not favorable because the 4d orbitals are much higher in energy than the 3d +rM-LSpherical Shell of e- density at rM-LMn+ 12 e-Crystal Field Theory (CFT)Crystal Field Stabilization Energy (CFSE) oo53252343dThe electronic absorption spectrum of [Ti(OH2)6]3 in aqueous of octfor some d- block metal trend in values of octfor the complexes [M(NH3)]
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