Molecular structure is the most basic information about a substance, determining most of its properties. Determination of accurate structures is hampered in that every method applies its own definition of "structure" and thus results from different sources can yield significantly different results. Sophisticated protocols exist to account for these differences, but until now, no textbook has been written to discuss such topics in a widely accessible manner.

Balancing quantum theory with practical experiments, Equilibrium Molecular Structures focuses on the theory involved in determining and converting measured and computed data sets into accurate and well-defined equilibrium structures.

This textbook begins with a discussion of quantum chemistry and the concept of potential energy surfaces, quantum chemical computation of structures and anharmonic force fields. The reader is next introduced to the method of least squares and the problem of ill-conditioning, leverage points, perturbation theory, computational aspects of determining semi-experimental equilibrium structures, the determination of moments of inertia from spectra, and the treatment of resonances. The textbook also examines the determination of diatomic molecular potentials using semiclassical and quantum mechanical methods as well as position and distance averages.

From basic elements to the latest advances and current best practices, Equilibrium Molecular Structures contains abundant references, examples, and exercises. Additional examples are also available as downloadable support material on the publishers website. These features make the book ideal for class instruction but also user-friendly for self-instruction. It is recommended for newcomers to the field and also for experienced spectroscopists who want to expand their area of knowledge.

About the Author

Jean Demaison is a former Research Director at CNRS, University of Lille I. The research for his PhD, which he received in 1972, was performed in Freiburg and Nancy in the field of microwave spectroscopy. He was invited to be a Professor at the Universities of Ulm, Louvain-La-Neuve, and Brussels. In 2008, he received the International Barbara Mez-Starck prize for outstanding contribution in the field of structural chemistry. He has published over 300 papers in research journals and contributed to 17 books. Professor Attila G. Cs�sz�r is the head of the Laboratory of Molecular Spectroscopy at E�tv�s University of Budapest, Hungary. He received his PhD in 1985 in theoretical chemistry at the same place. His research interests include computational molecular spectroscopy, structure determinations of small molecules, ab initio thermochemistry, and electronic structure theory. He has published more than 150 papers in these fields, mostly in leading international journals. James E. Boggs is Professor Emeritus at the University of Texas at Austin. His PhD was received from the University of Michigan after working on the Manhattan District Project. He has spent sabbaticals at Harvard, Berkeley, and the University of Oslo. Dr. Boggs has published over 325 papers, mostly on microwave spectroscopy and applications of quantum theory. He organized the first 23 biennial meetings of the Austin Symposium on Molecular Structure. In 2010, he received the International Barbara Mez-Starck prize for outstanding contributions in structural chemistry. He has been chosen as a Fellow of the American Chemical Society.

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