MESOMERISM is an extension of valency theory, and, like all valency theory, is founded in the quantum theory. Ingold and Ingold, J. Chem. Soc., 1310 (1926)—generalized polarization theory.
THE recognition of valency exchange degeneracy as a matter of primary importance in relation to the energy 1 and reactivity 2 of organic molecules makes it the more necessary clearly to indicate the ...