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Olympiad workbookNSECChemical Bonding and Molecular Structure

The resonance structures of SCN ⁻ are given below along with the S - C and C - N bond lengths S-C (in pm) C-N (in pm) SCN‾ 165 117 Single bond 181 147 Double bond 155 128 Triple bond ----- 116 Among the following, the incorrect statement/s is/ are

Options

  1. AThe contribution from resonance structures (i) and (ii) is more important than that from structure (iii)
  2. BThe formal charge on S in structure (iii) is zero
  3. CThe degree of contribution of these structures is in the order: i > ii > iii
  4. DThe formal charge on N in structure (ii) is zero

Correct answer

C. The degree of contribution of these structures is in the order: i > ii > iii

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