So let's look at the second type of reaction. Now, this methane molecule, the ch bond, also dissociates, but now it associates in a way such that the pair of electrons go onto the carbon atoms. So now we get a methyl anion and a positively charged H atom. So this guy has no electrons in the one s orbital. So that means it will be very active and will tend to act as a lewis acid. Now, this methyl and ion, since now it has a pair of electrons inside its orbital, it will tend to act as a lewis base donating those electrons.