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Introductory Organic Chemistry - Lecture 23

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Lecture 23 - Valence Theory and Constitutional Structure (1858)

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.

Prof. J. Michael McBride
CHEM 125: Freshman Organic Chemistry, Fall 2008
(Yale University: Open Yale)
http://oyc.yale.edu
Date accessed: 2009-11-11
License: Creative Commons BY-NC-SA

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