CHEM 262 Lecture Notes - Lecture 2: Allyl Group, Alkene
1 Feb 2017
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Document Summary
Conjugated compounds and color: some organic molecules can give color on objects, like food we eat. What is conjugation: conjugation is the interaction of p or orbitals on three or more adjacent atoms. Conjugated ions: an allylic carbocation/carbanion is a type of conjugated system. Stability of conjugated dienes: conjugation increases the stability of the overall molecule. Synthesis of conjugated dienes: based induced elimination of hx (x = halide) from an allylic halide, to prevent any substitution products, -oh is not used as a base. Iupac nomenclature: you want to find the longest chain, the lowest priority functional group, the lowest number for substitution, geometry of double bond (e vs z) Addition to alkenes review: markovnikov"s rule: h adds to the less substituted carbon (carbon with more hydrogen(s)) and x to the more substituted carbon. Addition to separated dienes: each double bond is a separated diene behaves like an alkene double bond and follows the markovnikov"s rule.
