Lecture 1292013.pdf

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Department
Chemistry
Course
CHEM 2332H
Professor
Christopher J.Douglas
Semester
Spring

Description
Lecture 1292013Wednesday January 29 2014855 AMProblem set 1 due in a week2 2103 2174 3105 3246 4217 428TodayWrap Butadiene conformationAllyl MOsOn Your Own reactivity of Allyl 155157The DielsAlder ReactionNonbondingAssumption molecule is flat flat conformation p orbitals are all sticking updown so they can find each other and overlap constructively couldnt overlap if perpendicularCan rotate about single bond and every 180 degrees get p orbitals overlapping but while rotating goes through some points where p orbitals are perpendicular to each other strans 0 energyscis28 kcals p orbitals overlap bc steric hindranceo90 7 kcals bc now you lose 1st lowest energy bonding MO bc p orbitals dont overlap at allAllyl MO has 3 Cs 3 p orbitals CH35can be cation radical or anion Ochem Page 1
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