CHEM 125A - Freshman Organic Chemistry I
Lecture 11 - Orbital Correction and Plum-Pudding Molecules. The lecture opens with tricks ("Z-effective" and "Self Consistent Field") that allow one to correct approximately for the error in using orbitals that is due to electron repulsion. This error is hidden by naming it "correlation energy." Professor McBride introduces molecules by modifying J.J. Thomson's Plum-Pudding model of the atom to rationalize the form of molecular orbitals. There is a close analogy in form between the molecular orbitals of CH4 and NH3 and the atomic orbitals of neon, which has the same number of protons and neutrons. The underlying form due to kinetic energy is distorted by pulling protons out of the Ne nucleus to play the role of H atoms. (from oyc.yale.edu)
| Lecture 11 - Orbital Correction and Plum-Pudding Molecules |
| Time | Lecture Chapters |
| [00:00:00] | 1. Introduction |
| [00:01:54] | 2. Correcting for Electron Repulsion When Using Orbitals |
| [00:15:26] | 3. Correlation Energy and the Limits of Orbital Theory |
| [00:30:47] | 4. Kinetic Energy's Effects on the Shapes of Atomic Orbitals |
| [00:40:33] | 5. Moving Nuclei to Distort "Electric Puddings": Case Studies with Methane and Ammonia |
| References |
| Lecture 11 - Orbital Correction and Plum-Pudding Molecules Instructor: Professor J. Michael McBride. Resources: Professor McBride's website resource for CHEM 125 (Fall 2008). Transcript [html]. Audio [mp3]. Download Video [mov]. |
Go to the Course Home or watch other lectures: