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Coordination Compounds question

2016 · Q100
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Coordination Compounds question

2016 · Q100

NEETChemistryCoordination CompoundsMCQ+4 / −1
Which of the following has longest C−-−O bond length? (Free C−-−O bond length in CO is 1.128 Ao\mathop A\limits^oAo​.)
  1. A
    [Fe(CO)4]2−-−
  2. B
    [Mn(CO)6]+
  3. C
    Ni(CO)4
  4. D
    [Co(CO)4]−-−
View written solutionFree

Correct answer: A

[Fe(CO)4]2−-− has the lowest C—O bond order means the longest bond length.

Since metal atom is carrying maximum –ve charge therefore it would show maximum synergic bonding as a resultant C—O bond length would be maximum.

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