Which of the following structures is correct?

  1. A

    The structure of the intermediate product, formed by the oxidation of toluene with CrO3 and acetic anhydride, whose hydrolysis gives benzaldehyde, is C6H5CH2OCOCH3.

  2. B

    The carbon-carbon bond length in benzene is 139 pm.

  3. C

    Cyclopentadienyl anion has unusually low stability.

  4. D

    Cycloheptatrienyl cation is also known as tropylium ion

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    Solution:

    (a) The intermediate is C6H5CH(OCOCH3)2, benzylidene acetate 

    (c) Cyclopentadienyl anion has high stability

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