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Topic: Cyclohexane  (Read 3595 times)

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Offline BetaAmyloid

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Cyclohexane
« on: October 25, 2009, 08:06:05 PM »
A couple of questions.

If you take a look at this video: Cyclohexane

or if you would just like to read the questions:

(Bromine is used for example, but it is still, overall, cyclohexane)

I was wondering, when the cis-1,2-dibromocyclohexane is switching from each of its positions (between its one bromine equatorial to axial and bromine axial to equatorial), can it not form a medium in which both the bromides are somewhat stuck in the middle, between equatorial and axial? Could this not occur, since the forces between atoms would reach keq?

Also, does the 1,2-dibromocyclohexane prefer to be in the cis- position or the trans- position, and why would they switch between positions if one is more stable over the other?

He then states that the reflections or isomers of the trans-1,2-dibromocyclohexane is not the same, he doesn't explain why, so why is this?
Discovery consists of seeing what everybody has seen and thinking what nobody has thought - Albert Szent-Györgyi

Offline JGK

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Re: Cyclohexane
« Reply #1 on: October 26, 2009, 01:07:02 PM »
http://en.wikipedia.org/wiki/Cyclohexane_conformation

In thinking that the bromine atoms are contantly switching dont forget that the same must be happening to the Hydrogens also. there will not be a situation where the bromines "get stuck" part way as the forces acting across the entire molecule will not permit it/
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Offline BetaAmyloid

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Re: Cyclohexane
« Reply #2 on: October 26, 2009, 02:30:34 PM »
http://en.wikipedia.org/wiki/Cyclohexane_conformation

In thinking that the bromine atoms are contantly switching dont forget that the same must be happening to the Hydrogens also. there will not be a situation where the bromines "get stuck" part way as the forces acting across the entire molecule will not permit it/

Yeah, thanks, I was thinking about that the other day - it makes sense.
Discovery consists of seeing what everybody has seen and thinking what nobody has thought - Albert Szent-Györgyi

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