Chemistry - Coordination Chemistry Question with Solution | TestHub

In Zeise's salt, Pt→ethylene back-bonding weakens the C=C bond, so its IR stretching frequency decreases; hence (A) is false. Due to synergic bonding, the carbon atoms acquire hybridization intermediate between sp² and sp³, making (B) correct. The ethylene plane is approximately perpendicular to the PtCl₃ plane, so (C) is correct. The complex does not satisfy the Sidgwick EAN rule; therefore (D) is false.