The impact of valence theory declined during the 1960s and 1970s as molecular orbital theory grew in usefulness as it was implemented in large digital computer programs since the 1980s the more difficult problems of implementing valence bond theory into computer programs have been solved largely and valence bond theory has seen a resurgence. Valence bond theory is one of two commonly used methods in molecular quantum mechanics the other is molecular orbital theory this book focuses on the first of these methods ab initio valence bond theory the book is split into two parts. Theory and applications valence bond theory is one of two commonly used methods in molecular quantum mechanics the other is molecular orbital theory this book focuses on the first of these . Get this from a library valence bond methods theory and applications gordon a gallup this book focuses on ab initio valence bond theory part i gives examples of two electron calculations and the necessary theory to extend these to larger systems part ii discusses a series of case . The bond valence method or mean method or bond valence sum not to be mistaken for the valence bond theory in quantum chemistry is a popular method in coordination chemistry to estimate the oxidation states of atoms it is derived from the bond valence model which is a simple yet robust model for validating chemical structures with localized bonds or used to predict some of their properties
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