Question

What is the coordination number of central metal ion if it forms octahedral complex?

• A. 4
• B. 6
• C. 8
• D. 12

Hint:

Octahedral $\to$ 6 bonds; Tetrahedral $\to$ 4 bonds.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
The coordination number is the number of ligand donor atoms that are directly bonded to the central metal ion.
Step 2: Key Formula or Approach:
Octahedral geometry is defined by six points in space.
Step 3: Detailed Explanation:
In an octahedral coordination complex, the metal ion is at the center and there are six ligands surrounding it, directed towards the corners of a regular octahedron. Each ligand provides one donor atom site. Thus, the coordination number must be 6.
Step 4: Final Answer:
The coordination number is 6.