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Solving problem 6 of chapter 15 draw the five resonant structures of the cyclopenta -dainanion.
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Are all carbon -carbon bonds equivalent? how many absorption lines would you expect to see in the protein nmr and carbon nmr spectrum of the anion? so first of all, let's start writing the structure of the anion.
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It's penta, so we have five carbon atom.
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One, two, three, four and five.
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We have two double bonds and since it's the anion form, we have an electron lumper and a negative charge.
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So now in order to write the resonance structures, we just need to move the negative charge basically around and see how many structures we can have.
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So we can indicate this movement with arrows.
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Okay, so the first structure we obtain is this one.
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We are moving this negative charge in here, forming a double bond, and now the negative charge is going to be on this carbon.
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This double bond is going to stay just there.
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Then we are going to do the same again.
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So this one is moving here, and this one is moving here.
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So now we have a double bond.
01:47
In here the negative charge is going to be on this carbon and this double bond is going to just stay there then we do the same this one you're going to go there so we have the double bond in here the negative charge is going to be here and this double bond is going to stay there we keep moving the negative charge so now sorry this one is not a nice draw so now this negative charge will move the double bond in here and the negative charge is going to be the collides in here...