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Homework Help: Bond Length

  1. Mar 13, 2007 #1
    1. The problem statement, all variables and given/known data

    Arrange in increasing order of bond length: CO, CO2, CO3^2-

    3. The attempt at a solution

    CO2 has double bonds, CO has back bonds and Co3 2- has a partial double bond (resonance), so it should be CO2>Co3 2->CO. Is that right?
  2. jcsd
  3. Mar 14, 2007 #2
  4. Mar 14, 2007 #3


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    I;d say that CO has resonance structures as well. So you claim that

    CO_2 < CO_{3}^{2-} < CO ?
  5. Mar 14, 2007 #4
    Yeah. When I draw the MO diagrams of the three molecules to find the bond order, the answer is exactly the reverse though.
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