Chair and boat shapes for cyclohexane. created by sal khan. diastereomers, constitutional isomers and meso compounds | khan academy conformational analysis of cyclohexane part 1 organic. We don't have to worry about any torsional strain, so the chair conformation is the most stable conformation for cyclohexane. next we'll take a look at the boat conformation. here we have the boat conformation of cyclohexane, if you look at the carbons it looks a little bit like a boat.. The concentration of the twist-boat conformation at room temperature is very low (less than 0.the difference in energy between the chair and the twist-boat conformation of cyclohexane can be measured indirectly by taking the difference in activation energy for the conversion of the chair to the twist-boat conformation and that of the reverse.
The following discussion presents some of the essential features of this conformational analysis. on careful examination of a chair conformation of cyclohexane, we find that the twelve hydrogens are not structurally equivalent. six of them are located about the periphery of the carbon ring, and are termed equatorial.. Let me draw two, the same cyclohexane, but in two different chair configurations that it could be equilibrium in. so you could have this one, you could have this one, so this could be one chair configuration, and i'll draw it like this.. Another conformation which is important in any conformational analysis is the transition state, or maximum energy conformation on the rotational path.for cyclohexane this is the so-called "half-chair conformation", in which now 5 carbons are co-planar, and only one is puckered out of the plane..
No comments:
Post a Comment
Note: Only a member of this blog may post a comment.