Question

In which of the following donation of electrons from filled d-orbitals of metals to empty orbitals of ligand is not observed:

• A. $R_{2}P$
• B. ${CN}^{-}$
• C. $H_{2}C={CH}_2$
• D. $F^{-}$

Answer 1

The correct option is A $R_{2}P$

Since $F^{-}$ does not have low-lying vacant ${\sigma }^{\ast }$ or ${\pi }^{\ast }$ orbital it does not accept electron where as others ligands has vacant ${\pi }^{\ast }$ and ${\sigma }^{\ast }\left(R_{2}P\right)$ and accept $d-e^{-}$easily.