The Lewis structure for BH3 is given below along with its character table. The molecule lies in the xy plane with the z-axis serving as the principal C3 axis. The 2px and 2py orbitals are degenerate and have e’ symmetry. Determine the symmetry for the 2s and 2pz orbitals of boron and the symmetry for the ligand group orbitals comprised of three hydrogens as seen below (note LGO(2) and LGO(3) are degenerate). Once you have determined the symmetry for all of the orbitals, construct the molecular orbital diagram for BH3. (16 pts)
The Correct Answer and Explanation is: