ABSTRACT
The wavefunctions describe the electron's ground and excited states and are called molecular orbitals. The knowledge of polyatomic molecular geometry requires the determination of all independent distances between each pair of atoms or, equivalently, a knowledge of bond lengths and bond angles. Diagrams representing molecular-orbital energy changes as a function of angle bonds are called Walsh diagrams. In the elementary treatments of the molecular bond, some relevance is given to the concept of hybridization of atomic orbitals. An important class of compounds is that whose molecules have a G. N. Lewis structure with a chain of alternating double and simple bonds. When the valence-electron number increases up to a point of filling the orbital that in the linear geometry would be non-bonding, the energy lowering of this orbital as the molecule bends would result in an overall better-stable molecule.
