Open Yale CoursesCHEM 125: Freshman Organic ChemistryLecture 24 - Determining Chemical Structure by Isomer Counting (1869)<< previous session | next session >>Overview:Half a century before direct experimental observation became possible, most structures of organic moleculeswere assigned by inspired guessing based on plausibility. But Wilhelm Körner developed a strictly logicalsystem for proving the structure of benzene and its derivatives based on isomer counting and chemicaltransformation. His proof that the six hydrogen positions in benzene are equivalent is the outstandingexample of this chemical logic but was widely ignored because, in Palermo, he was far from the seats ofchemical authority.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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