Which of the following is the most stable form of cyclohexane?
A
Boat
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B
Planar
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C
Twist boat
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D
Chair
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Solution
The correct option is C Chair Chair form is the most stable form of cyclohexane.
The most stable conformation of cyclohexane is the chair form shown. The
C-C-C bonds are very close to 109.5o, so it is almost free of angle strain. It is also a fully staggered conformation and so is free of torsional strain.