Which of the following resonance structures for OCN−
will contribute most to the correct structure of OCN...

Question

Which of the following resonance structures for OCN−
  will contribute most to the correct structure of OCN−?

A. O=C=N, with one lone pair on O, two lone pairs on C, and one lone pair on N
B. O−C≡N, with three lone pairs on O and one lone pair on N
C. O≡C−N, with one lone pair on O and three lone pairs on N
D. O=C=N, with two lone pairs on O and two lone pairs on N
E. They all contribute equally to the correct structure of OCN−
 .

CramX · Accepted Answer

Step 1: Let's solve this step by step:. Step 2: : Analyze the Resonance Structures. To determine which resonance structure contributes most, we need to consider: - Formal charges - Electron distribution - Electronegativity of atoms - Stability of the structure Step 3: : Calculate Formal Charges. For each structure, we'll calculate the formal charge using the formula: Step 4: : Evaluate Option A. $	ext{C: } 4 - 4 - \frac{1}{2}(4) = 0$ This structure has minimal charge separation. Step 5: : Evaluate Option B. $	ext{C: } 4 - 2 - \frac{1}{2}(4) = 1$ This structure has significant charge separation. Step 6: : Evaluate Option C. $	ext{C: } 4 - 2 - \frac{1}{2}(4) = 1$ This structure has extreme charge separation. Step 7: : Evaluate Option D. $	ext{C: } 4 - 2 - \frac{1}{2}(4) = 0$ Similar to Option A, but with different electron distribution. Step 8: : Conclusion. Option A (O=C=N) contributes most because: - Minimal formal charge - Symmetric electron distribution - Follows the octet rule - Minimizes charge separation Final Answer: O=C=N, with one lone pair on O, two lone pairs on C, and one lone pair on N will contribute most to the correct structure of OCN−.

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QuestionChemistry

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Step 1:
Let's solve this step by step:

Step 2:
: Analyze the Resonance Structures

Step 3:
: Calculate Formal Charges

Final Answer

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