Ch. 15 – page 1 Chapter 15– Conjugated Systems & Orbital Symmetry CHM 2211 – Davidson 1.Introduction and Stability of Dienes •Recall stability of alkenes from Ch. 7 •Isolated alkenes – double bonds with 1 or more CH2groups between them oSame stability as single alkenes •Conjugated – double bonds alternating with single bonds oMore stable than single alkenes •Cumulated – double bonds that share a common C oLess stable than single alkenes
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