Lect13_0921 - 8. Sigma Bonds & Bond Rotation Two groups...

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Ch. 4 - 1 8. Sigma Bonds & Bond Rotation Two groups bonded by a single bond can undergo rotation about that bond with respect to each other Conformations – temporary molecular shapes result from a rotation about a single bond Conformer – each possible structure of conformation Conformational analysis –ana lys isof energy changes occur as a molecule undergoes rotations about single bonds
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Ch. 4 - 2 8A. 8A. Newman Projections Newman Projections
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Ch. 4 - 3 8A. 8A. Newman Projections Newman Projections H H H H H H
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Ch. 4 - 4 8A. 8A. Newman Projections Newman Projections New Projection formula OH Me H H Et Cl
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Ch. 4 - 5 8B. 8B. How to Do a Conformational Analysis How to Do a Conformational Analysis
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Ch. 4 - 6 9. Conformational Analysis of Butane
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Ch. 4 - 7
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Ch. 4 - 8 10. The Relative Stabilities of Cycloalkanes: Ring Strain Cycloalkanes do not have the same relative stability due to ring strain Ring strain comprises: Angle strain
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Lect13_0921 - 8. Sigma Bonds & Bond Rotation Two groups...

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