CHEM 125A - Freshman Organic Chemistry I
Lecture 12 - Overlap and Atom-Pair Bonds. 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. (from oyc.yale.edu)
| Lecture 12 - Overlap and Atom-Pair Bonds |
| Time | Lecture Chapters |
| [00:00:00] | 1. The United-Atom "Plum-Pudding" View for Ethane and Methanol |
| [00:13:25] | 2. The Orbital Shape of 1-Flouroethanol |
| [00:19:37] | 3. Localized Pairwise Bonding between Atoms and the Idea of Overlap |
| [00:36:37] | 4. Hydrogen at Bonding Distance: A Case for Overlap |
| References |
| Lecture 12 - Overlap and Atom-Pair Bonds 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: