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Topic: Why is 2-methyl 1,4 cyclopentadiene wrong???  (Read 2976 times)

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Offline mitko1994

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Why is 2-methyl 1,4 cyclopentadiene wrong???
« on: April 09, 2010, 06:57:29 PM »
hello, i have a question i just can't figure out :-[.

Why is 2-methyl 1,4 cyclopentadiene wrong???

the textbook says the right answer is 1-methyl 1,3 cyclopentadiene
  but i want to know why. So please explain the mistake

Thanks

Offline Matias Ekstrand

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Re: Why is 2-methyl 1,4 cyclopentadiene wrong???
« Reply #1 on: April 10, 2010, 12:19:04 AM »
2-methyl cyclopenta-1,4-diene does not yield the lowest number on the substituents or the main functional group. There is another spot you may begin counting from that gives you 1-methyl cyclopenta-1,3-diene
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