Coordination Compounds 2 Question 38

####40. If the bond length of CO bond in carbon monoxide is 1.128\AA, then what is the value of CO bond length in Fe(CO)5 ?

(a) 1.15\AA

(b) 1.128\AA

(c) 1.72\AA

(d) 1.118\AA

(2006)

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Answer:

Correct Answer: 40. F

(4)

Solution:

  1. In CO, bond order =3. In metal carbonyls like Fe(CO)5, due to dπpπ back-bonding, bond order of CO decreases slightly therefore, bond length increases slightly.


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