Chemical Bonding and Molecular Structure

Chemical Bonding and Molecular Structure

Question

According to molecular orbital theory, which of the following will not be a viable molecule?

  • H22-

  • He22+

  • He2+

  • H2-

Answer

A.

H22-

Species Bond Order
H22- 1/2[2-2] = 0 (does not exist)
He22+ 1/2[2-0] = 1 (Exist)
He22- 1/2 [2-1] = 0.5 (Exist)
H2- 1/2 [ 2-1] = 0.5 (Exist)

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