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Consider two different geometries for the borne molecule (BH3) as shown below. A

ID: 903498 • Letter: C

Question

Consider two different geometries for the borne molecule (BH3) as shown below. Assign point groups to each molecule. Use appropriate group orbitals to determine the molecular orbital diagram for each BH3 molecule (include electrons). Draw the resulting molecular orbitals and label all molecular orbitals with their appropriate symmetries (A1/ E, etc.) and bond type (sigma, sigma*, etc.).What is the VSEPR predicted structure for BH3? From your MO diagram, comment on the energetically preferred geometry.

Explanation / Answer

Consider two different geometries for the borne molecule (BH3) as shown below. A