Even though the rings are different size, cyclopropane and cyclobutane have similar overall strain energy. This is because:
they have similar angle compression from the optimal 109.5∘
strain energy is a kinetic phenomenon
cyclopropane has a larger overall heat of combustion than cyclobutane
cyclobutane has more eclipsing interactions but less angle strain
A
cyclobutane has more eclipsing interactions but less angle strain
B
they have similar angle compression from the optimal 109.5∘
C
strain energy is a kinetic phenomenon
D
cyclopropane has a larger overall heat of combustion than cyclobutane
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Solution
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Even though the rings are different size,cyclopropane and cyclobutane have similar overall strain energy. This is because cyclobutane has more eclipsing interactions than cyclopropane but less angle strain.
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