Before revision: These highly excited electrons can then excite reactant electrons in the highest occupied molecular orbital or fill the lowest unoccupied molecular orbital, raising the energy of the molecule and allowing for a lower energy transition stateSHOULD BE LINKING BACK TO REF 5.
After revision: These highly excited electrons can then excite reactant electrons in the highest occupied molecular orbital or fill the lowest unoccupied molecular orbital, raising the energy of the molecule and allowing for a lower energy transition stateSHOULD BE LINKING BACK TO REF