Question

The sum of coordination number and oxidation number of the metal M in the complex $\left[M\right(en{)}_2\left(C_2{O}_4\right)]Cl$ (where, en is ethylenediamine) is

• A. 9
• B. 6
• C. 7
• D. 8

Answer 1

The correct option is A

9

Given complex compound is $\left[M\right(en{)}_2\left(C_2{O}_4\right)]Cl$

Let oxidation number of M is x.

$\therefore$ x - 2 - 2 = - 1

or x = + 3

Now, as coordination number is defined as the total number of binding sites attached to the metal. Hence, in the given complex coordination number is 6.