Structure (hybridization, bonding, resonance...)
Why is 1,4-cyclohexadiene stabilized? Using qualitative perturbation theory to teach conjugation
Six-carbon polyenes display quite regular properties, when one compares their stabilities using hydrogenation enthalpies. Each double bond in a conjugated system is worth about 10 kJ/mol in resonance energy, and non-conjugated dienes show no resonance energy. Cyclohexadienes are puzzling: 1,3-cyclohexadiene is less stable, and 1,4-cyclohexadiene is more stable, than corresponding open-chain dienes. Qualitative molecular orbital perturbation theory can be used to explain these anomalies.
This is a set of lecture videos for organic chemistry 1. The videos are recorded tablet style and not in front of a class. They are available through iTunesU. To experience all of the content, run the iTunesU app on an iPad. The videos can be watched on any computer that runs iTunes.
ChemTube3D contains interactive 3D animations and structures, with supporting information for some of the most important organic reactions.
- Images representing atomic orbitals and molecular orbitals
- Animated plots of wave functions
- Animated plots of electron density
- "Dot-density" plots of electron density
- Plots of radial distribution functions
a website to study various subjects with vedio lectures