BF3 is often described as a molecule in which boron is electron deficient, with an elect...

BF₃ is often described as a molecule in which boron is electron deficient, with an electron count of six. However, resonance structures can be drawn in which boron has an octet, with delocalized π electrons.

a. Draw thesestructures.

b. Find the molecular orbital in Figure 5.32 that shows this delocalization and explain your choice.

c. BF₃ is the classic Lewis acid, accepting a pair of electrons from molecules with lone pairs. Find the orbital in Figure 5.32 that is this acceptor; explain your choice, including why it looks like a good electron acceptor.

d. What is the relationship between the orbitals identified in Parts b and c?