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increased in energy. The character table for C 4v is given as follows together with the
derived ligand field:
C 4 v
E
2C 4
C 2
2 V v
2 V d
x 2 + y 2 ,z 2
A 1
1
1
1
1
1
z
A 2
1
1
1
-1
-1
R z
x 2 -y 2
B 1
1
-1
1
1
-1
B 2
1
-1
1
-1
1
xy
E
2
0
-2
0
0
(x, y)(Rx, Ry)
(xz, yz)
Figure 30: Splitting of d-orbital energies as derived for a C 4v symmetry with a strong ligand field in z-
direction
The weak signal observed for g = 8.48 may be interpreted as a low lying excited state
with S = 5/2.
With 57 Fe having a nuclear spin of l = 1/2, {SiW 11 Fe} also shows hyperfinecoupling
splitting the g = 2.024 signal into two as expected.
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