University of pennsylvania college of general studies professor william a price ph d chem 241 601
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University Of Pennsylvania College of General Studies Professor William A. Price, Ph.D. CHEM 241-601. Organic Chemistry , 9 th Edition By T.W. Graham Solomons. From the Bark of the Pacific Yew Tree. Introduction: Structure and Bonding. Atomic structure Lewis Structures Resonance

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University of pennsylvania college of general studies professor william a price ph d chem 241 601 l.jpg

University Of PennsylvaniaCollege of General StudiesProfessor William A. Price, Ph.D.CHEM 241-601

Organic Chemistry, 9th Edition

By T.W. Graham Solomons


From the bark of the pacific yew tree l.jpg
From the Bark of the Pacific Yew Tree


Introduction structure and bonding l.jpg

Introduction: Structure and Bonding

Atomic structure

Lewis Structures

Resonance

Structural Formulas

Acids and Bases






P x p y p z l.jpg
px, py, pz







All have the same geometry all have 4 regions of electron density l.jpg
All Have the Same GeometryAll Have 4 Regions of Electron Density






Resonance rules l.jpg
Resonance Rules

  • Cannot break single (sigma) bonds

  • Only electrons move, not atoms

    3 possibilities:

    • Lone pair of e- to adjacent bond position

      • Forms p bond

        - p bond to adjacent atom

        - p bond to adjacent bond position


Curved arrow formalism shows flow of electrons l.jpg
Curved Arrow Formalism Shows flow of electrons


Resonance stabilization of ions pos charge is delocalized l.jpg
Resonance Stabilization of IonsPos. charge is “delocalized”







Propose lewis structures l.jpg
Propose Lewis Structures

  • H2CO2 b) O3 c) N2O

    d) NH3O e) C2H3ClO f) C2H5NO 


Problem l.jpg
Problem

Draw [NO2]+ and [NO2]-. Which ion has a “localized” charge and which has a “delocalized” charge. Explain.




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Condensed Formulas












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