Asked in PMC Practice Test 2Moderate

The unhybridized p orbitals of benzene are present _.

Correct answer: C. In the form of a cloud above and below the benzene ring

  • A. Between the C-C bonds of benzene
  • B. Above and below the carbon bonds
  • C. In the form of a cloud above and below the benzene ring
  • D. None of these options is correct

Explanation

All of the carbon atoms in the benzene rings are sp2-hybridized: the overlap of the sp2 orbitals around the ring produces a framework of six sigma bonds, while the unhybridized p-orbitals are perpendicular to this plane overlapping in a side-to-side fashion to form three pi-bonds.

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About Benzene and Aromatic Compounds

Benzene has a planar ring of delocalised π electrons, giving aromatic stability and equal carbon-carbon bond lengths. The topic covers resonance, electrophilic substitution reactions such as nitration, halogenation, sulphonation and Friedel-Crafts reactions, along with substituent effects and the distinction between substitution in benzene and addition in ordinary alkenes.

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