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Question

The bond length of C−O bond in carbin monoxide is 1.128 ˚A. The C−O bond length in Fe(CO)5 is:

A
1.158 ˚A
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B
1.128 ˚A
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C
1.718 ˚A
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D
1.118 ˚A
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Solution

The correct option is A 1.158 ˚A
Due to synergic bond formation in Fe(CO)5, the bond order of CO decreases. Hence the bond length will increase. So, the CO bond length in Fe(CO)5 is 1.158oA .

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