CH 320M- Midterm Exam Guide - Comprehensive Notes for the exam ( 18 pages long!)
Document Summary
1. 7: combining vb and mo theory, valence bond theory sees bonding between the electrons in atoms next to each other, and from there we get hybridization states. 1. 8 resonance: theory of resonance, resonance is a theory that molecules can be described as a hybrid of various lewis structures. The individual lewis structures = contributing structures. (aka resonance structures: resonance structues are not in equilibrium with eachother, resonance theory does not suggest that the bonds are constantly changing from one position to another. 1. 10 bond lengths & bond strenghts in alkanes, alkenes, and alkynes: triple bonds are shorter than doube bonds, which are shorter than single bonds, there is a correlation between bond length and bond strength. Shorter = stronger: the more s-character in a hybrid = closer electrons are to nucleus = shorter bond, double bonds are stronger than single bonds but not twice as strong.
