spectroscopic states having the same symmetry and the same spin multiplicity do
not cross over. In the following are reported the remaining electronic configurations. Consider that the diagrams are valid for both O h and D 4h symmetries, provided the energy trend inversion.
5 T 2 (d € d 2
γ
)
1 A 2
3 A 2
1 G
3 P
3
F
1
F
1
D
1
S
1
G
3
D
1 I
3
G
2
F
3 P
3
H
3
D
5 E
30
70
60
50
40
20
10
1
2
3
D g / B
Energy diagram for the configureation d 4
2
T 1 (d 4
€
)
5 E(d 3
€
d γ )
1 T 2
1
T 1
3 T 2
1 A 1
3 A 1
3 A 2
1 A 2
1 E
3 E
E / B
1
2
3
D g / B
10
20
30
40
70
E / B
2 A 1
4
A 1
4 E
2 A 1
2 S
2 F
2 G
2 H
2 F
2 D
2 I
4 D
4 P
4 G
4 S
4 F
4 E
2
E
2
A 2 . 2 T 1
4 T 2
6 A 1 (d 3
€
d 2
γ
)
4
T 1 (d 4
€
d γ )
2
T 2 (d 5
€
)
Energy diagram for the configureation d 3
These diagrams show a vertical line which separates two regions of the electronic states, that having the maximum spin multiplicity (high spin) and that the
minimum one (low spin). The high spin region is at lower Dq.
No energy meaning is attributable to the vertical line.
d ϒ means e g orbital, d e means t 2g orbitals. The other symbols are those
conventional.
The electronic configurations range from d
2 to d
8 ; d
1 and d
9 are very simple and
constituted by only two right lines, those of T 2 and E states.
Appendix
167