Early Contributions to Quantum Chemistry

Bonino s first results in this direction were published in four papers, three in Zeitschrifi fur Physikalische Chemie in 1933 and 1934 and one in Memorie della Reale Accademia delle scienze dell istituto di Bologna. [45] Through the study of the constitution and the aromatic character of the heterocyclic compounds, Bonino confronted the classical ideas of structural organic chemistry. In the case of heterocyclic compounds he and his collaborators emphasized that the classical structure formulae of organic chemistry could not account for the new Raman spectroscopic data. According to these, the existence of a double chemical bond for pyrrole, furane, and thiophene was improbable. 

Bonino s principal goal with his formulae was to furnish the chemist with a new pictorial representation of chemical facts necessary for studying the chemical as well as the physical properties of the aromatic compounds. Bonino s contribution thus furthered the utility of the old structural formulae of organic chemistry by embracing certain physical properties. His considerations regarding the structure of benzene and heterocyclic aromatic molecules allowed him to foresee and to explain 

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