Abstract
The FERM O concept emerges as a powerful and innovative implement to investigate the role of molecular orbitals applied in the description of breakage and formation of chemical bonds. In this work, Hartree-Fock (HF) and Density Functional Theory (DFT) calculations were carried out for a series of four tridentate ligands and their behavior was analyzed using molecular orb ital (M O) energies. It was observed that HOMO energies are inadequate to describe the Pearsons Hard and Solf acid-base (HSA B) p ricinple behavior of these compounds. By using the frontier effective-for-reaction molecular orbital (FERM O) concept, the reactions that are driven by HOM O, and those that are not, can be better exp lained, independent of the calculation method used, since both HF and Kohn-Sham methodologies lead to the same FERM O.
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