What is the coordination number of AIH2OsOHJCI2 SolutionCoor

What is the coordination number of [AI(H2O)s(OH)JCI2?

Solution

Coordination number is 6 here.

We counts the number of ligands inside the coordination sphere i.e inside the square brackets. 5 water molecules and 1 OH molecule gives the molecule coordination number 6. The 2 Cl molecules outside the brackets does not gives the count for coordination number because they are not the attached ligands. 2 Cl atoms outside the brackets gives +2 charge to the whole molecule i.e [Al (H2O)₅ (OH)]²⁺