Open Yale CoursesCHEM 125: Freshman Organic ChemistryLecture 11 - Orbital Correction and Plum-Pudding Molecules<< previous session| next session >>Overview:The lecture opens with tricks ("Z-effective" and "Self Consistent Field") that allow one to correctapproximately for the error in using orbitals that is due to electron repulsion. This error is hidden by namingit "correlation energy." Professor McBride introduces molecules by modifying J.J. Thomson's Plum-Puddingmodel of the atom to rationalize the form of molecular orbitals. There is a close analogy in form between themolecular orbitals of CH4and NH3and the atomic orbitals of neon, which has the same number of protonsand neutrons. The underlying form due to kinetic energy is distorted by pulling protons out of the Ne nucleusto play the role of H atoms.Problem sets/Reading assignment:Reading assignments, problem sets, PowerPoint presentations, and other resources for this lecture can be
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