The correct structure of Fe(CO)₅ is (at.no.of Fe = 26)

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trigonal bipyramidal

octahedral

tetrahedral

square pyramidal

answer is A.

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Detailed Solution

Fe=1s²,2s²2p⁶,3s²3p⁶3d⁶,4s²4p⁰
In Fe(CO)₅, the Fe atom is in dsp³ hybridized state. Therefore, the shape of molecule is trigonal bipyramidal. The hybridization is as:

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