Chemistry

How many pi bonds and sigma bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

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  1. Kristy--I've seen this post repeatedly for the past 2-3 days. Here is the site I used and I don't get 18 but quite a few more than that. I'm not an organic chemist, not that familiar in reading these stick models, but I don't think 18 sigma bonds is correct. I did not count any of the ring bonds in benzene as sigma bonds (but I did count the -H attached to the benzene ring as sigma bonds). There are two H atoms attached to most of the C atoms in the heterocyclic ring and the C bonds in the heterocyclic ring are sigma bonds as well as the CH3 at the top.
    http://en.wikipedia.org/wiki/Methylphenidate

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