Ligand Field Theory Flashcards

1
Q

Which orbitals are anti-bonding in a Td symmetric crystal field?

A

e

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which represents an orbital set that would have e symmetry in a Td crystal field?

A

D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Tetrahedral transition metal complexes are always_____spin.

High or Low spin

A

High Spin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

In an Oh crystal field, the eg orbitals are destabilized.

What is the value of A?

A

6

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

6 coordinate complexes are generally stable as _____ electron species.

A

18

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Square planar complexes are generally stable as _____ electron species.

A

16

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

In an Oh crystal field, the t2g orbitals are stabilized.

What is the value of B?

A

-4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the irredicuable representions of the ligand’s SALCs of atomic orbitals around a Oh metal complex

A

a1g + t1u + eg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

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

A

Antibonding

(Ligand π orbitals are lower in energy than the t2g set and therefore any mixing results in t2g inherting antibonding character)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Addison Tau Parameters

C4v

A

τ=0

α =β =180o

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Addison Tau Parameters

D3h

A

τ=1

α = 120o

β = 180o

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Td=AΔo

What is the value of A?

A

4/9

(There are only 4 ligands in a tetrhedral complex. Therefore, the ligand field is roughly 2/3 of the octahedral field)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the splitting energy of the d-orbitals in an octehedral crystal field?

A

10Dq or Δo

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is Δo in terms of Dq?

A

10Dq

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the symmetry of the orbital set below in a Oh ligand field?

A

eg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the symmetry of the orbital set below in a Oh ligand field?

A

t2g

17
Q

As the principal quantum number increases, o_______.

Increases or Decreases

A

Increases

18
Q

As the oxidation state increases,o_______.

Increases or Decreases

A

Increases

19
Q

π-Acceptors_____∆oh

Increases or Decrease

A

Increase

20
Q

π-Donors_____∆oh

Increase or Decrease

A

Decrease

21
Q

CO, H-, PPh3

Strong or Weak field ligands?

{Rank them}

A

Strong Field Ligands

PPh3<h>-<co></co></h>

22
Q

Total Spin

A

Stot= (# unpaired e-)/2

23
Q

2*(Stot)+1

A

Spin Multiplicity

24
Q

Quintet

A

Stot=2

25
Q

Triplet

A

Stot=1

26
Q

Doublet

A

Stot=1/2

27
Q

Singlet​

A

Stot=0

28
Q

I- ,H2O ,Cl-

Strong or Weak field ligands?

{Rank Each}

A

Weak Field Ligands

I-<cl>-<h>2O</h></cl>

29
Q

I- ,H2O ,Cl-

Strong or Weak field ligands?

{Rank Each}

A

Weak Field Ligands

I-<cl>-<h>2O</h></cl>

30
Q

Which represents an orbital set that would have t2 symmetry in a Td crystal field?

A

C

31
Q

Which represents an orbital set that would have t2g symmetry in a Oh crystal field?

A

B

32
Q

Which represents an orbital set that would have eg symmetry in a Oh crystal field?

A

A

33
Q

Which orbitals are antibonding in a Td symmetric crystal field?

A

t2