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Freshman Organic Chemistry

Yale,, Fall 2008 , Prof. J. Michael McBride

Updated On 02 Feb, 19

Overview

How Do You Know - Force Laws, Lewis Structures and Resonance - Double Minima, Earnshaws Theorem and Plum - Puddings - Coping with Smallness and Scanning Probe Microscopy - X-Ray Diffraction-Seeing Bonds by Electron Difference Density - Quantum Mechanical Kinetic Energy - One-Dimensional Wave Functions - Chladni Figures and One - Electron Atoms - Reality and the Orbital Approximation - Orbital Correction and Plum - Pudding Molecules - Overlap and Atom - Pair Bonds - Overlap and Energy - Match - Checking Hybridization Theory with XH_3-Chemical Reactivity: SOMO, HOMO, and LUMO - Recognizing Functional Groups - Reaction Analogies and Carbonyl Reactivity - Amide, Carboxylic Acid and Alkyl Lithium-Oxygen and the Chemical Revolution - Rise of the Atomic Theory - Berzelius to Liebig and W�hler - Radical and Type Theories (1832-1850)-Valence Theory and Constitutional Structure (1858) - Determining Chemical Structure by Isomer Counting (1869)

Models in 3D Space (1869-1877); Optical Isomers - Vant Hoffs Tetrahedral Carbon and ChiralityCommunicating Molecular Structure in Diagrams and Words - Stereochemical Nomenclature; Racemization and Resolution - Preparing Single Enantiomers and the Mechanism of Optical Rotation - Esomeprazole as an Example of Drug Testing and Usage - Preparing Single Enantiomers and Conformational Energy - Stereotopicity and Baeyer Strain Theory -Conformational Energy and Molecular Mechanics - Sharpless Oxidation Catalysts and the Conformation of Cycloalkanes - Understanding Molecular Structure and Energy through Standard Bonds - Bond Energies, the Boltzmann Factor and Entropy - Potential Energy Surfaces, Transition State Theory and Reaction Mechanism

Includes

Lecture 15: Chemical Reactivity SOMO, HOMO, and LUMO

4.1 ( 11 )


Lecture Details

Freshman Organic Chemistry (CHEM 125)

Professor McBride begins by using previous examples of "pathological" bonding and the BH_3 molecule to illustrate how a chemists use of localized bonds, vacant atomic orbitals, and unshared pairs to understand molecules compares with views based on the molecules own total electron density or on computational molecular orbitals. This lecture then focuses on understanding reactivity in terms of the overlap of singly-occupied molecular orbitals (SOMOs) and, more commonly, of an unusually high-energy highest occupied molecular orbital (HOMO) with an unusually low-energy lowest unoccupied molecular orbital (LUMO). This is shown to be a generalization of the traditional concepts of acid and base. Criteria for assessing reactivity are outlined and illustrated.

0000 - Chapter 1. Introduction "Pathological" Bonding in the BH3
1045 - Chapter 2. Viewing BH3 via Electron Density and Molecular Orbitals
2025 - Chapter 3. Assessing Reactivity through HOMO-LUMO Interactions
4015 - Chapter 4. Criteria for Assessing Reactivity

Complete course materials are available at the Open Yale Courses website httpopen.yale.educourses

This course was recorded in Fall 2008.

Ratings

4.0


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Comments
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Sam

Excellent course helped me understand topic that i couldn't while attendinfg my college.

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Dembe

Great course. Thank you very much.

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