Which of the following statements about a carbon-carbon double bond is correct?
A. Each of the two carbons is capable of bonding to three other atoms.
B. The double bond allows free rotation of the molecule at the bond position.
C. The double bond is longer than a corresponding carbon-carbon single bond.
D. Double bonds can be found in cyclical structures.
E. None of these statements about carbon- carbon double bonds is correct.
Answer: D
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