M.O diagram of Ne2 Calculate bond order
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Class 11
>>Chemistry
>>Chemical Bonding and Molecular Structure
>>Molecular Orbital Theory
>>Use the molecular orbital energy level d
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Use the molecular orbital energy level diagram to show that N
2
would be expected to have a triple bond, F
2
, a single bond and Ne
2
, no bond.
Hard
Solution
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Formation of N
2
molecule: Electronic Configuration,
σ1s
2
<σ∗1s
2
<σ2s
2
<σ∗2s
2
<[π2p
x
2
=π2p
x
2
]<<σ2p
z
2
Bond order = (N
b
−N
a
)/2=(10−4)/2=3
Bond order indicates the number of bonds in diatomic molecule is 3, hence TripleBond
Formation of F
2
molecule: Electronic Configuration:
σ1s
2
<σ∗1s
2
<σ2s
2
<σ∗2s
z
2
σ∗2pz
2
<[π2p
x
2
=π2p
x
2
]<[π∗2p
x
2
=π∗2p
x
2
]<σ2p
z
Bond order = (N
b
−N
a
)/2=(10−8)/2=1
Single bond F−F.
Formation of Ne
2
molecule: Electronic Configuration,
σ1s
2
<σ∗1s
2
<σ2s
2
<σ∗2s
z
2
<σ∗2pz
2
<[π2p
x
2
=π2p
x
2
]<[π∗2p
x
2
=π∗2p
x
2
]<σ2p
z
2
Bond order = (N
b
−N
a
)/2=(10−10)/2=0
Hence, no bond between Ne atoms