CHMB41H3 Lecture Notes - Lecture 33: Benzyl Group, Alkene, Activation Energy
Document Summary
We have covered this section of chapter 8. Isolated diene: double bonds that are isolated from each other, seeperated by more than 1 single bond, these will react just like any dienes we have already seen. Cumulative dienes: two double bonds are stuck on the same carbons, middle carbon is sp and the end carbons are sp2, sp2 have only one p orbital, sp have 2 p orbital. Conjugated dienes: separated only one single bond. Why are conjugated dienes the most stable: delocolization -> hybridization -> stability, hybridization of orbitals forming c-c bonds. The orbitals are made of sp2 orbital overlap. More reactive double bond: least stable, carbon that is least substituted, 3" carbon reacts more readily. Slide 41 you never react the pi bond of the benzene ring in a reaction. Helps make it stable: the other one is isolated.
