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Solving problem 33 of chapter 15.
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So we need to explain which one of these three molecules.
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Basically is the same molecule, but one is in the form of radical, one is in the form of an ion.
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One is in the form of an ion.
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Which one of the tree is more stable? so it is a nine member ring.
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Let's try to draw a nine member ring.
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So it is one, two, three.
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Two, three, four, five, six, seven, eight, and nine, more or less.
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The length of the bonds should be all the same, but it's pretty difficult to draw it.
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And we have four double bonds.
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So one, two, three, and four.
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And then we have the same molecule by in the form of cadion.
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Three, four, five, six, seven, eight and nine.
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So we are the cation and we have the same double bonds.
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And then we have the anion.
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Okay.
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So in order to see which one of these three is stable, we need to count for the aromaticity...