crystal field diagrams Flashcards
(24 cards)
What indicates a square planar structure
d8 group, 4 ligands
Is I-, a high or low spin complex
(for octahedral complexes only).
High
Is Br-, a high or low spin complex
(for octahedral complexes only).
High
Is S2-, a high or low spin complex
(for octahedral complexes only).
High
Is SCN-, a high or low spin complex
(for octahedral complexes only).
High
Is Cl-, a high or low spin complex
(for octahedral complexes only).
High
Is NO3, a high or low spin complex
(for octahedral complexes only).
High
Is F-, a high or low spin complex
(for octahedral complexes only).
High
Is CO, a high or low spin complex
(for octahedral complexes only).
Low
Is CN-, a high or low spin complex
(for octahedral complexes only).
Low
Is PPh3, a high or low spin complex
(for octahedral complexes only).
Low
Is en, a high or low spin complex
(for octahedral complexes only).
Low
Is OH-, a high or low spin complex
(for octahedral complexes only).
Low
Is C2O4(2-), a high or low spin complex
(for octahedral complexes only).
High
Is O(2-), a high or low spin complex
(for octahedral complexes only).
Either
Is H2O, a high or low spin complex
(for octahedral complexes only).
Either
Is NH3, a high or low spin complex
(for octahedral complexes only).
Either
If a field ligand is neither high or low spin, how do you decide how to draw the splitting diagram.
Strong-field ligands and higher metal oxidation states tend to favor low-spin complexes, while weak-field ligands and lower oxidation states tend to favor high-spin complexes.
All Co3+ complexes except [CoF6]3− are low spin
(for octahedral complexes only).
True or false
True
d8 metal ions with strong-field ligands (Low spin)
Likely to be square planar.
d8 metal ions with weak-field ligands (High spin)
More likely to be tetrahedral.
d6 metal ions with weak-field ligands
Likely to be tetrahedral.
Bulky ligands
Can favor tetrahedral geometry due to steric effects
4d and 5d metals
More likely to be square planar than their 3d counterparts
