Resonance is a phenomenon that happens when a molecule can exist in a number of Lewis buildings that differ solely within the placement of electrons. A resonance hybrid is a illustration of the molecule that may be a weighted common of all the potential Lewis buildings. To attract a resonance hybrid, you first want to attract all the potential Lewis buildings for the molecule. Then, you have to decide the relative contribution of every Lewis construction to the resonance hybrid. The relative contribution of a Lewis construction is decided by its power. The decrease the power of a Lewis construction, the higher its contribution to the resonance hybrid.
Resonance is a crucial idea in chemistry as a result of it could possibly assist to elucidate a wide range of molecular properties, akin to bond lengths and bond angles. For instance, the benzene molecule is a resonance hybrid of two Kekule buildings. The 2 Kekule buildings have completely different bond lengths and bond angles, however the resonance hybrid has a median bond size and bond angle that’s intermediate between the 2 Kekule buildings.
