The following diagram shows the energies of valence molecular orbitals of boron trifluoride. The energies of three occupied orbitals (the a₂HOMO and doubly degenerate e orbitals) are shown. The energy of the unoccupied LUMO is also shown. The angle on the abscissa is the F€•B€•F bond angle. Based on the MO diagram, is boron tri-fluoride planar or pyramidal? Which structure does the VSEPR model predict?

Transcribed Image Text:

BF3 RHF 6-31G(d,p) 0.40 0.20 -LUMO a1 0.00 :-0.20- 5 -0.40 - -0.60 --номо 16 а2 -MOS 14,15 e -0.80 90 100 110 120 F-B-F angle (degrees) MO energy (Hartree)