Question

what is the coordination number of platinum in the complex [Pt(NH3)(H2O)Cl2]​

Answer 1

Coordination number is the number of ligands attached to the Central metal atom.

Here, we see that there are 4 ligands attached to Platinum (the central metal atom).

Hence, the coordination no. of Platinum is 4 in the given complex.

Answer 2

The coordination number of platinum in the complex  $[Pt(NH_{3} )(H_{2} O)Cl_{2} ]$  is four.

CO-ORDINATION NUMBER:

• In a complex,there will be a central metal ion attached to ligands.
• The entire thing which is represented inside the square bracket constitutes a co-ordination sphere.
• The central metal ion has primary and secondary valencies.
• The secondary valency is the number of ligands attached to the central metal atom.
• Here it is equal to four.