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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 12: Overlap and Atom-Pair Bonds

4.1 ( 11 )


Lecture Details

Freshman Organic Chemistry (CHEM 125)

This lecture begins by applying the united-atom "plum-pudding" view of molecular orbitals, introduced in the previous lecture, to more complex molecules. It then introduces the more utilitarian concept of localized pairwise bonding between atoms. Formulating an atom-pair molecular orbital as the sum of atomic orbitals creates an electron difference density through the cross product that enters upon squaring a sum. This "overlap" term is the key to bonding. The hydrogen molecule is used to illustrate how close a simple sum of atomic orbitals comes to matching reality, especially when the atomic orbitals are allowed to hybridize.

0000 - Chapter 1. The United-Atom "Plum-Pudding" View for Ethane and Methanol
1324 - Chapter 2. The Orbital Shape of 1-Flouroethanol
1937 - Chapter 3. Localized Pairwise Bonding Between Atoms and the Idea of Overlap
3636 - Chapter 4. Hydrogen at Bonding Distance A Case for Overlap

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

This course was recorded in Fall 2008.

Ratings

3.7


3 Ratings
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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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