The chair conformation is a term used for the most stable chemical conformation of a six membered single bonded carbon ring like cyclohexane. When atoms are bound to each other, the electrons in the bonds want to spread out as far as they can from each other. In methane this bond angle is 109.5 degrees. In a chair conformation the connected carbon atoms arrange themselves as close to the 109.5 degree optimium as they can. The overall structure looks like a chair, and is more stable than the other main configuration which is called the boat conformation. In chemistry, a chemical conformation is the spatial arrangement of atoms in a molecule. ... A cyclohexane molecule in chair conformation, with hydrogen atoms in axial position in red, equatorial in blue. ... Covalently bonded hydrogen and carbon in a molecule of methane. ... The valence shell electron pair repulsion theory or VSEPR is a model in chemistry that aims to generally represent the shapes of individual molecules. ... The simplest hydrocarbon, methane, is a gas with a chemical formula of CH4. ... Geometry of the water molecule Molecules have fixed equilibrium geometries--bond lengths and angles--that are dictated by the laws of quantum mechanics. ...
chair conformation for cyclohexane
Image File history File links Chair conformation German Wiki original File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links Chair conformation German Wiki original File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ...
In the lowest-energy chairconformation, half of the 12 hydrogens are in axial positions, which means their C-H bonds are parallel and appear to stick up and down from the structure, the other half are in equatorial positions; meaning that they are splayed out.
Only the twist form is isolable as - like the chair form - it represents an energy minima, although of a higher energy than the chair form due to increased torsional strain when compared to the chair form.
The boat and half-chair forms are transition states between the twist forms and the twist and chair forms respectively, and are impossible to isolate.
Feeds |
Contact