The bond length between C-C in benzene is:
Correct answer: B. 1.39 Å
- A. 1.34 Å
- B. 1.39 Å
- C. 1.56 Å
- D. 1.38 Å
- E. 1.46 Å
Explanation
Option B is correct because the bond length of C-C in benzene is approximately 1.39 Å. This is due to the delocalization of electrons across the ring, resulting in bond lengths that are neither purely single nor double bonds. Option A (1.34 Å) is too short, suggesting a double bond, which does not apply here. Option C (1.56 Å) is indicative of a single bond, which is also not the case. Option D (1.38 Å) is close, but slightly off the experimentally determined value. Option E (1.46 Å) is too long and does not fit the resonance hybrid model of benzene.
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Hydrocarbons are studied through the structures and reactions of alkanes, alkenes, alkynes and aromatic compounds. Coverage includes free radical substitution in alkanes, electrophilic addition to carbon-carbon multiple bonds, benzene substitution, aromatic stability and the difference between addition reactions of alkenes and substitution reactions of benzene.
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