less, is closer to planarity, with an angle between the planes of 10.379 Cyclopentane
might be expected to be planar, since the angles of a regular pentagon are 108,
but it is not so, also because of eclipsing effects.380 There are two puckered conformations,
the envelope and the half-chair. There is little energy difference
between these two forms and many five-membered ring systems have conformations
somewhere in between them.381 Although in the envelope conformation one
carbon is shown above the others, ring motions cause each of the carbons in
less, is closer to planarity, with an angle between the planes of 10.379 Cyclopentanemight be expected to be planar, since the angles of a regular pentagon are 108,but it is not so, also because of eclipsing effects.380 There are two puckered conformations,the envelope and the half-chair. There is little energy differencebetween these two forms and many five-membered ring systems have conformationssomewhere in between them.381 Although in the envelope conformation onecarbon is shown above the others, ring motions cause each of the carbons in
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