Valence Bond Theory and Hybrid Atomic Orbitals

The valence-bond approach considers the overlap of the atomic orbitals (AO) of the participation atoms to form a chemical bond. Due to the overlapping, electrons are localized in the bond region. The overlapping AOs can be of different types, for example, a sigma bond may be formed by the overlapping the following AOs.  For more details click here.

 Courtesy: http://www.science.uwaterloo.ca