Oh Complexes

Question 1

Δo

Answer 1

10 Dq

Question 2

Degeneracy of A states

Answer 2

1

Question 3

Degeneracy of E states

Answer 3

2

Question 4

Degeneracy of T states

Answer 4

3

Question 5

Why are Orgel diagrams not interested n d0 or d10

Answer 5

No possible electron transitions

Question 6

What are Racah parameters

Answer 6

Constants used to describe interelectronic repulsion

Question 7

What does B depend on

Answer 7

Ligand type and how hard a ligand s

Question 8

Tanabe-Sugano diagrams

Answer 8

Start in low-spin and work towards free atom

Question 9

Nephalauxetic effect

Answer 9

Decrease of B in complex compared to free ion

Question 10

What does nephalauxetic effect depend on

Answer 10

Softness of ligand donor atom, softer has better overlap of metal d-orbitals with ligand, gives more diffuse MO so d electrons more spread out which decreases d-d electron repulsion

Question 11

What does a smaller nephalauxetic β mean

Answer 11

Greater degree of covalent bonding

Question 12

Ligand-metal charge transfer

Answer 12

Can be ligand to metal charge transfer where there’s transfer of ligand character orbital to one that’s metal character of vice versa

Question 13

Why are ligand-metal charge transfers very strong

Answer 13

Spin and Laporte allowed

Question 14

What does Racah parameter B measure

Answer 14

D-d electron repulsion