Created by StemPy LabThe figure shows six cyclic species, I to VI. (i) I is not aromatic: its carbon breaks the ring of electrons. (ii) II has electrons and is aromatic. (iii) III has electrons and is aromatic. (iv) IV has electrons and fits the Hückel rule with . (v) V has electrons and is aromatic, with . (vi) VI has electrons, which fits with . How many of the statements above are correct?
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← Two statements about the structure of benzene are given below. Statement I: Benzene forms a triozonide, which points to three double bonds, yet only one ortho-disubstituted product is known, though a fixed Kekulé structure predicts two. Statement II: X-ray diffraction shows all six carbon to carbon bonds are 139 pm long, between the C-C single bond (154 pm) and the C=C double bond (133 pm).In each substitution reaction of benzene below, an acid or a Lewis acid first makes the electrophile that attacks the ring. Match each reagent mixture with that electrophile. List-I (Reagents) A. Concentrated HNO₃ and concentrated H₂SO₄ B. Cl₂ and anhydrous FeCl₃, in the dark C. CH₃Cl and anhydrous AlCl₃ D. CH₃COCl and anhydrous AlCl₃ List-II (Electrophile) I. CH₃⁺ II. CH₃CO⁺ III. NO₂⁺ IV. Cl⁺ →
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