Single Choice

Which of the following has longest $$C-O$$ bond length? (Free C-O bond length in $$CO$$ is $$1.128\overset {\circ}{A}$$.)

A$$Ni(CO)_{4}$$
B$$[Co(CO)_{4}]^{\ominus}$$
C$$[Fe(CO)_{4}]^{2-}$$
Correct Answer
D$$[Mn(CO)_{6}]^{+}$$

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.

SIMILAR QUESTIONS

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