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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: anilin on April 30, 2009, 03:35:01 PM

Title: problem
Post by: anilin on April 30, 2009, 03:35:01 PM

What is the stereodrawing conformation for the ring in the attached compound?
Thanks

Title: Re: problem
Post by: plankk on May 01, 2009, 03:58:01 AM

I understand that you want the most stable conformation, so read about a cyclohexane conformation: http://en.wikipedia.org/wiki/Cyclohexane_conformation (http://en.wikipedia.org/wiki/Cyclohexane_conformation)

Title: Re: problem
Post by: anilin on May 01, 2009, 07:07:52 AM

Quote from: plankk on May 01, 2009, 03:58:01 AM

I understand that you want the most stable conformation, so read about a cyclohexane conformation: http://en.wikipedia.org/wiki/Cyclohexane_conformation (http://en.wikipedia.org/wiki/Cyclohexane_conformation)

Thanks but I need to have the most stable conformation for a cyclohexen not cyclohexane. For cyclohexane we get two chair conformations and for cyclohexen two half chair conformations. I don’t know how to draw half chair and the order of the axial and equatorial bonds attaching to the carbons in the ring.
Thanks

Title: Re: problem
Post by: kimyacı on May 02, 2009, 03:49:36 PM

 maybe  it will be so

Title: Re: problem
Post by: anilin on May 02, 2009, 07:13:55 PM

Quote from: kimyacı on May 02, 2009, 03:49:36 PM

 maybe  it will be so

How about this conformation?

Title: Re: problem
Post by: Squirmy on May 02, 2009, 11:56:25 PM

That's close. Below are the Chemdraw templates for cyclohexene half-chairs:

(https://www.chemicalforums.com/proxy.php?request=http%3A%2F%2Fi19.photobucket.com%2Falbums%2Fb185%2Fworm193%2Fhalfchair.gif&hash=3ac3d6f12bf4dab3e3a34e97446b792c85ec75ca)

Title: Re: problem
Post by: kimyacı on May 03, 2009, 03:16:26 AM

 This is more logical than mine  Squirmy. you are right