devarshi-dt-logo

Question:

Which of the following has longest C-O bond length?

[Fe(CO)4]2-

[Mn(CO)6]+

[Co(CO)4]-

Ni(CO)4

Solution:

[Fe(CO)4]2- has longest C-O bond length. Since in the complex metal atom is carrying maximum negative charge therefore it would show maximum synergistic bonding due to which C-O bond length would be maximum.