1. Using resonance structures, account for the following phenomenon: a. A normal barrier to rotation for a C=C double bond is about 65 kcal/mol (i.e., the pi bond needs to break to allow free rotation about the remaining single bond). Explain then the abnormally low energy barrier to rotation about the carbon-carbon double bond observed for the following compound: H- H H N(Me)2 AG= 14.6 kcal/mol

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Chapter1: Chemical Foundations
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1. Using resonance structures, account for the following phenomenon:
a. A normal barrier to rotation for a C=C double bond is about 65 kcal/mol (i.e., the pi bond needs to
break to allow free rotation about the remaining single bond). Explain then the abnormally low energy
barrier to rotation about the carbon-carbon double bond observed for the following compound:
H-
H
H
N(Me)2
AG= 14.6 kcal/mol
Transcribed Image Text:1. Using resonance structures, account for the following phenomenon: a. A normal barrier to rotation for a C=C double bond is about 65 kcal/mol (i.e., the pi bond needs to break to allow free rotation about the remaining single bond). Explain then the abnormally low energy barrier to rotation about the carbon-carbon double bond observed for the following compound: H- H H N(Me)2 AG= 14.6 kcal/mol
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