Week 6-August 4

Week 6-August 4 - Week 6 August 4, 2011 Electrocyclic...

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Week 6 August 4, 2011 Electrocyclic Reactions: An Introduction Show the curved arrows for the following electrocyclic reactions : CH 3 H CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 H ! ! ! h ! CH 3 CH 3 CH 3 CH 3 (plus enantiomer) CH 3 H CH 3 H CH 3 CH 3 (plus enantiomer) How can we explain the stereochemistry ? Look at the molecular orbitals! Reading : Section 25.2 157
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Week 6 August 4, 2011 Electrocyclic Ring-Closings: 6 Electrons, Thermal Explain the observed stereochemistry: CH 3 CH 3 ! CH 3 CH 3 Reading : Section 25.2 158
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Week 6 August 4, 2011 Electrocyclic Ring-Closings: 8 Electrons, Thermal Explain the observed stereochemistry: CH 3 CH 3 ! CH 3 CH 3 (plus enantiomer) Reading : Section 25.2 159
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Week 6 August 4, 2011 Electrocyclic Ring-Openings: 4 Electrons, Thermal Explain the observed stereochemistry: CH 3 CH 3 ! CH 3 H CH 3 H Reading : Section 25.2 160
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August 4, 2011 Electrocyclic Ring-Closings: 4 Electrons, Photochemical Explain the observed stereochemistry: CH 3 H CH 3 H h ! CH
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This note was uploaded on 07/28/2011 for the course CHEM S20 taught by Professor Evan during the Spring '11 term at Belhaven.

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Week 6-August 4 - Week 6 August 4, 2011 Electrocyclic...

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