Question

The total number of electrons donated by ligands to platinum in in $\left[Pt{\left(en\right)}_{2}C{l}_2\right]$ is?

• A. $8$
• B. $10$
• C. $12$
• D. $14$

Answer 1

Answer: (C)

$12$

$\left[Pt\right(en{)}_{2}C{l}_2]$

$en⟶$ (ethane-1,2,diame)$⟶$ bidentate.

$Cl⟶$ unidentate

Each ligand donates $2$ electrons. There are $2$ $en$ which is bidentate ligand. So, its contribution of electrons is $4\times 2=8$ and $2Cl$ contribute $2\times 2=4$ electrons. So total number of electrons donated by ligands to platinum are $12$.