Molecular Orbital Practice Problems Answers - Western Connecticut Page 2
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1
2
3Western Connecticut State University
Molecular Orbital Theory
General Chemistry I CHE 110
+
The following questions pertain to the C
ion:
2
A)
Draw the molecular orbital energy diagram for this ion. Label all of the
orbitals specifically.
*
σ
2px
*
*
π
π
2py
2pz
2p
2p
σ
2px
π
π
Energy
2py
2pz
*
σ
2s
2s
2s
σ
2s
*
σ
1s
1s
1s
+
C
C
σ
1s
2
2
2
2
2
1
1s
2s
2p
1s
2s
2p
B)
Give the molecular electron configuration for the ion:
2
*
2
2
*
2
3
(σ
)
(σ
)
(σ
)
(σ
)
(π
)
1s
1s
2s
2s
2p
C)
Determine the bond order for the ion:
Bond Order = (7 – 4) / 2 = 1.5
D)
Indicate whether the species is paramagnetic or diamagnetic:
Paramagnetic: one unpaired electron
-
F)
Compare the relative stability of this molecule to C
and C
:
2
2
-
+
C
> C
> C
(Based on their Bond Orders)
2
2
2
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