The formation of the covalent bond is usually understood from the electron sharing, like explained by the following figure:
However, this simple physical picture seemingly hinders many things. In quantum mechanics or chemistry, the electron is represented fully by the wavefunction.
Therefore, how can I understand the formation of the covalent bond from electron/wavefunction interaction?
I have gained some initial ideas when two wavefunctions are touched, such as:
- Electrostatic attraction;
- Charge transfer.
These processes/concepts play an important role when two wavefunctions interacted. (I'm sorry I can't find concrete references for these concepts or processes.) In these processes, the attraction interaction (bonding) will compete with the repulsion interaction (antibonding) to find the ground state.
I post this question to look a full understanding of the formation of the covalent bond from electron wavefunction interaction.