Open Yale CoursesCHEM 125: Freshman Organic ChemistryLecture 23 - Valence Theory and Constitutional Structure (1858)<< previous session| next session >>Overview:Youthful chemists Couper and Kekulé replaced radical and type theories with a new approach involvingatomic valence and molecular structure, and based on the tetravalence and self-linking of carbon. Valencestructures offered the first explanation for isomerism, and led to the invention of nomenclature, notation, andmolecular models closely related to those in use today.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 2008students. Please see Resources section below.
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