Bond order calculation from resonance structures is a fundamental concept in chemistry. It gauges the strength and multiplicity of chemical bonds within molecules, enabling the prediction of their stability and reactivity. A simple example is benzene, where the carbon-carbon bond order is 1.5, indicating resonance between two Kekule structures.
Understanding bond order is crucial for comprehending molecular structure, chemical bonding, and reactivity. It has played a pivotal role in the development of quantum chemistry and significantly contributed to our understanding of chemical phenomena.