Werner S Theory Of Coordination Compounds

To determine the sum of the oxidation state (magnitude) and coordination number of cobalt in , follow these steps:

1. Identify the Ligands: In the complex , the ligands are bipyridine (bpy) and chloride ions (Cl^-).
2. Oxidation State Calculation:

• Sodium (Na) has an oxidation state of +1.
• Bipyridine (bpy) is a neutral ligand, contributing 0 to the oxidation state.
• Chloride ions (Cl^-) have an oxidation state of -1. There are four chloride ions contributing a total of -4.
• Let the oxidation state of cobalt (Co) be x. The sum of the oxidation states equals 0:

Simplifying, we get: .

Therefore, .

1. Coordination Number: The coordination number of cobalt is determined by the number of ligand donor atoms bonded to it.

• Each bipyridine ligand binds through two nitrogen atoms, contributing 2 to the coordination number.
• Each chloride ion (Cl) contributes 1 to the coordination number. With four chloride ions, this adds up to 4.
• Thus, the total coordination number is .

1. Sum Calculation:

The sum of the oxidation state magnitude (3) and coordination number (6) is:

1. Verification: The calculated value (9) falls within the provided range (9, 9).

Therefore, the answer is 9.