So all four types of orbitals are filled. So that means if we don't have our bonding orbitals our Sigma bonding, we must use our Sigma antibodies. So the lowest unoccupied molecular orbital is the anti unoccupied Sigma antibonding orbital of one of the ho bonds. Now, let's go to example C. An example C.
We have an alkane reacting with our hydrobromic acid to form the following carbocation with a positive charge. And our bromine an ion. So which one is the homo?