Orbitals shapes and energies

Charge-transfer interactions between frontier molecular orbitals are clearly not the only factors which determine the relative stabilities of various transition states, in spite of the fact that frontier orbital theory has been remarkably successful in accounting for relative reactivities and regioselectivities in various reactions. For example, frontier molecular orbital theory is based on orbital shapes and energies present in the isolated molecules, and these are expected to change upon the approach of one molecule to another. 

How did something as seemingly abstract as the quantum mechanical model of I the atom help the development of modern materials and light sources The concept of orbital shapes and energies ultimately provided ways to predict chemical reactivities and optimize conditions in which reactions occur. Halogen lamps are predicated on the chemical reaction of halogen molecules with the mngsten wire of... 

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