Question

In which of the following compound(s) synergic bonding is there?

• A. Zeise's salt
• B. $\left[Fe\right(H_{2}O{)}_{5}NO{]}^{2+}$
• C. $NiC{l}_2(PP{h}_3{)}_2$
• D. Wilkinson’s catalyst

Answer 1

Answer: (A), (B), (C), (D)

Wilkinson’s catalyst

Synergic bonding in case of metal nitrosyls , for example :
$\left[Fe\right(H_{2}O{)}_{5}NO{]}^{2+}$

Synergic bonding in Metal Phosphenes​ , example: Wilkinson’s catalyst , $NiC{l}_2(PP{h}_3{)}_2$
Synergic bonding in alkenes , example Zeise's salt i.e. $K\left[PtC{l}_3\right({\eta }^2-C_2{H}_4\left)\right]$
The filled d-orbitals ​of metal overlap with vacant ${\pi }^{\ast }$ molecular orbital of ethylene molecule and forms $\pi$-bond/back bond/synergic bond.​