Ligand Field Theory Flashcards
Which orbitals are anti-bonding in a Td symmetric crystal field?
e
Which represents an orbital set that would have e symmetry in a Td crystal field?
D
Tetrahedral transition metal complexes are always_____spin.
High or Low spin
High Spin
In an Oh crystal field, the eg orbitals are destabilized.
What is the value of A?
6
6 coordinate complexes are generally stable as _____ electron species.
18
Square planar complexes are generally stable as _____ electron species.
16
In an Oh crystal field, the t2g orbitals are stabilized.
What is the value of B?
-4
What are the irredicuable representions of the ligand’s SALCs of atomic orbitals around a Oh metal complex
a1g + t1u + eg
Mixing ligand π charater (π-donor) into the t2g set of orbitals in an Oh ligand field results in the t2g set becoming more _________.
Bonding or Antibonding
Antibonding
(Ligand π orbitals are lower in energy than the t2g set and therefore any mixing results in t2g inherting antibonding character)
Addison Tau Parameters
C4v
τ=0
α =β =180o
Addison Tau Parameters
D3h
τ=1
α = 120o
β = 180o
Td=AΔo
What is the value of A?
4/9
(There are only 4 ligands in a tetrhedral complex. Therefore, the ligand field is roughly 2/3 of the octahedral field)
What is the splitting energy of the d-orbitals in an octehedral crystal field?
10Dq or Δo
What is Δo in terms of Dq?
10Dq
What is the symmetry of the orbital set below in a Oh ligand field?
eg