Question

In the complex $\left[Pt\right(O_2\left)\right(en{)}_2\left(Br\right){]}^{2+}$, coordination number and oxidation number of platinum are :

• A. 4, 3
• B. 4, 5
• C. 4, 6
• D. 6, 5

Answer 1

Answer: (D)

6, 5

In the complex $\left[Pt\right(O_2\left)\right(en{)}_2\left(Br\right){]}^{2+}$, coordination number and oxidation number of platinum are 6,5.

In the complex, platinum is surrounded by two monodentate ligand -oxygen and bromine and one didentate ligand $en$, thus coordination number = $1\times 2+2\times 2$ = 6

Oxidation number of platinum :
$x+(-1)\times 2+0+(-1)=+2$

$x-2-1=+2$

$x=+5$

Option (D) is correct.