Question

Use group theory to construct a qualitative molecular orbital diagram for the hypothetical square planer silane...

Use group theory to construct a qualitative molecular orbital diagram for the hypothetical square planer silane molecule(SiH4) ignore d orbital interaction

determine the bond order and identify the HUMO and LUMO

*Then compare your result to the MOdigram for CH4 (tetrahedral)

Discuss your conclusions

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Answer #1

The qualitative molecular orbital diagram for the hypothetical square planar silane molecule(SiH4) can be drawn as shown below.

The bond order of SiH4 = (1/2) * 8 = 4 (since there are a total of 8 electrons)

The bond order of Si-H = 4/4 = 1 (since there are 4 H's)

Here, t2-level is the HOMO and t2* level is the LUMO.

The MO diagram for methane molecule (CH4) can be drawn as shown below.

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