conformation of cyclohexane
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Conformations of ethane
the two extreme conformations of ethane, staggered and eclipsed, each shown from
three different viewpoints
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why
is the eclipsed conformation higher in energy than the staggered
conformation?
• some stabilizing interaction between the
C–H σ bonding orbital on one carbon and
• The first is that the electrons in the
the C–H σ* antibonding orbital on the
bonds repel each other and this
other carbon, which is greatest when the
repulsion is at a maximum when the
two orbitals are exactly parallel: this only
bonds are aligned in the eclipsed
happens in the staggered conformation
conformation.
stabilizing interaction between
filled C–H σ bond...
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Smaller rings (three, four, and five members)
a side-on view of
cyclopropane
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open envelope
conformation of
cyclopentane
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Substituted cyclohexane
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