1. Question 5 2 pts According to frontier molecular orbital theory, a reaction is favorable if which
of the following is true? O The energy gap between the HOMO and the LUMO is large. The
HOMO contains nonbonding electrons. O The reverse reaction is forbidden. O The energy gap
between the HOMO and the LUMO is small. The LUMO is at a lower energy than the HOMO.
D Question 6 2 pts According to FMO theory, an allowed transition state requires that the
HOMO and the LUMO have which of the following? Similar energies O Different energies
Similar symmetries only Opposite symmetries Similar energies and symmetries
Solution
5.
For the favourable reaction,
(d) The energy gap between the LUMO and HOMO is small
6.
For an allowed transition,
HOMO and LUMO must have,
(e) Similar energies and symmetries