Chemistry - Coordination Chemistry Question with Solution | TestHub

Question Explanation: Analyze bond lengths and ligand properties in Zeise's salt.

Concept: Organometallic Compounds - Zeise's Salt

Solution:

Assertion: In Zeise's salt, $[PtC{l}_3(C_2{H}_4){]}^{-}$, the three Pt−Cl bonds are not identical. The Cl atom trans to the ethylene ligand has a different bond length due to the trans-effect.

Reason: Ethylene is a strong $\pi$-acceptor ligand. It accepts electron density from the metal's d-orbitals into its ${\pi }^{\ast }$ antibonding orbitals (synergic bonding). The strong $\pi$-bonding nature of ethylene influences the bonding of the ligand positioned opposite to it.

Final Answer: Option (A)