Lesson 1
Kekule’s Advancements in Chemical and Molecular Notation 6
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Prof. McBride, J. Michael, CHEM 125a, Freshman Organic Chemistry I, Fall 2008, YALE Open Courses: Yale University, Chemistry (Accessed 13/09/2014), http://oyc.yale.edu/chemistry/chem-125a/lecture-23 License: Creative Commons BY-NC-SA Youthful chemists Couper and Kekulé replaced radical and type theories with a new approach involving atomic valence and molecular structure, and based on the tetravalence and self-linking of carbon. Valence structures offered the first explanation for isomerism, and led to the invention of nomenclature, notation, and molecular models closely related to those in use today.

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