Open Yale CoursesCHEM 125: Freshman Organic ChemistryLecture 13 - Overlap and Energy-Match<< previous session| next session >>Overview:Professor McBride uses this lecture to show that covalent bonding depends primarily on two factors: orbitaloverlap and energy-match. First he discusses how overlap depends on hybridization; then how bond strengthdepends on the number of shared electrons. In this way quantum mechanics shows that Coulomb's lawanswers Newton's query about what "makes the Particles of Bodies stick together by very strong Attractions."Energy mismatch between the constituent orbitals is shown to weaken the influence of their overlap. Thepredictions of this theory are confirmed experimentally by measuring the bond strengths of H-H and H-Fduring heterolysis and homolysis.Problem sets/Reading assignment:Reading assignments, problem sets, PowerPoint presentations, and other resources for this lecture can beaccessed from Professor McBride's on-campus course website, which was developed for his Fall 2008
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