Question

If the bond length of co bond in carbon monoxide is 1.128 a˚, then what is the value of co bond length in fe(co)5?

Answer 1

Answer:

1.15Å

Explanation:

due to pπ-dπ bonding, the CO forms back bonding with the Fe, which results in Decrease of Bond Order in C≡O bond, hence increasing its magnitude by the order of 0.01Å. What you have to do when getting questions of these type is,

1. Look for options where the 0.1Å digit is simmilar.
2. In these options look for the option having largest digit in 0.01Å.