MCQ
In $Fe ( CO )_{5},$ the $Fe - C$ bond possesses
  • A
    ionic characters
  • B
    $\sigma$ - character only
  • C
    $\pi-$ character
  • Both $\sigma$ and $\pi$ characters

Answer

Correct option: D.
Both $\sigma$ and $\pi$ characters
d
The $Fe - C$ bond has $\sigma$ and $\pi$ characteristics because of some back- bonding between $d$ $-$ orbital of metal and $p$ $-$ oribital of carbon.

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