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Introductory Organic Chemistry - Lecture 2

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Lecture 2 - Force Laws, Lewis Structures and Resonance

Professor McBride begins by following Newton's admonition to search for the force law that describes chemical bonding. Neither direct (Hooke's Law) nor inverse (Coulomb, Gravity) dependence on distance will do - a composite like the Morse potential is needed. G. N. Lewis devised a "cubic-octet" theory based on the newly discovered electron, and developed it into a shared pair model to explain bonding. After discussing Lewis-dot notation and formal charge, Professor McBride shows that in some "single-minimum" cases the Lewis formalism is inadequate and salvaging it required introducing the confusing concept of "resonance."

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

Lecture Material

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Supplementary lecture material is listed below.

1. Newton's Chemistry & the Business of Experimental Philosophy



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