AIIMS2019Chemistry-Chemical Bonding

AIIMS 2019 Chemistry Molecular Orbital Theory MCQ Question

Type: MCQ-conceptual-Medium-Class 11

In $\text{Fe(CO)}_5$ , the $\text{Fe--C}$ bond possesses

ionic characters

$\sigma\text{--character only}$

$\pi\text{--character}$

Both $\sigma$ and $\pi$ characters

Correct Answer

Option D

Detailed Explanation

The F–C bond exhibits σ and π characteristics due to the involvement of back-bonding, where the d-orbitals of the metal can interact with the p-orbitals of carbon. This interaction stabilizes the bond and allows for the formation of π-bonds alongside the σ-bond. Other options are not relevant as they do not provide any information or context related to the bonding characteristics of the F–C bond, making them incorrect. Understanding the role of back-bonding is crucial in explaining the hybridization and bond strength in organometallic compounds.

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