23.3.3 Ligand Field Theory Flashcards
Look at the orbital energy diagram for [Co(NH3 )6 ]3+ and [Co(F)6 ]3−. Which statement about this diagram is not correct?
There is greater split between the d orbitals of [Co(F)6 ]3− than the d orbitals of [Co(NH3 )6 ]3+.
Which statement about ligand field theory is not correct?
A strong field ligand does not react much with the metal. Therefore, the splitting distance between the strong field ligand and the metal is relatively small.
Look at the molecular orbital diagram for an M–L (metal-ligand) molecule. Which statement about this diagram is not correct?
The splitting of the orbitals is caused entirely by the repulsion that results when the ligand and metal interact.
Which statement about metal-ligand bonding interactions is not correct?
Carbon monoxide is a strong field ligand because of its electronegativity not because it is a pi acceptor.
Review the cobalt molecules studied earlier. Which statement about these two molecules is not correct?
Hexamine cobalt(III) appears orange because yellow light is absorbed.
Look at the energy diagram of the different d orbitals for [Co(NH3 )6 ]3+ and [Co(F)6 ]3−. Which statement about this diagram is not correct?
The energy differences between d orbitals are not affected by the arrangement of the ligands.
Look again at the energy diagram of the different d orbitals for [Co(NH3 )6 ]3+ and [Co(F)6 ]3−. Which statement about this diagram is not correct?
ΔE is greater for [Co(F)6 ]3− than for [Co(NH3 )6 ]3+.
Look at the spectrochemical series listed below. Which statement about this series is not correct?
Strong field ligands hold their electrons extremely tightly together.
Look again at the spectrochemical series listed below. Which statement about this series is not correct?
Electrons in strong field ligands are less free to repel the d orbitals than electrons in weak field ligands.
Look at the metal-ligand orbital diagram. Which statement about these orbitals is not correct?
The ligand orbital increases slightly in energy, while the metal decreases slightly in energy.
