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| How many different conformations are there? |
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| Which conformation is the most relatively unstable? |
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| Which conformation is the most relatively stable? |
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| What causes torsional strain? |
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| When, shown in a Newman Projection, the bonds are eclipsed. The hydrogen bonds are on the same plane and too close together. This causes torsional strain between the hydrogens. |
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| What casues angle strain? |
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| When angles are larger or smaller than 109-110 degrees |
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| What does a molecule do to relieve strain? |
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It will pucker or twist. This makes the bond angles closer to the ideal 109 degrees or moves them away from each other if they are on the same place. However, when this relieves angle strain, it can increase torsional strain and vice versa.
Exception: cyclohexane |
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| What is the only alkane that has no tortional or angle strain AND is abundant in a natural occuring state? |
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