Question:

The geometry and the number of unpaired electrons in tetrakis(1-norbomyl)Co, respectively, are: 

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In tetrahedral complexes, if the metal has a d\(^7\) configuration, one unpaired electron is expected.
Updated On: Jan 8, 2026
  • tetrahedral and one
  • tetrahedral and five
  • square planar and one
  • square planar and three
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The Correct Option is A

Solution and Explanation

Step 1: Understand the Coordination of the Metal Center.
The complex is of the form CoL\(_4\), where L represents a norbornyl ligand. The cobalt ion is surrounded by four ligands in a tetrahedral geometry.

Step 2: Analyze the Electron Configuration.
Cobalt in its +2 oxidation state has an electron configuration of [Ar] 3d\(^7\) 4s\(^2\). Since it is surrounded by four ligands, and the complex is tetrahedral, one electron will remain unpaired.

Step 3: Conclusion.
Thus, the geometry is tetrahedral, and there is one unpaired electron.

Final Answer: \[ \text{Tetrahedral and one unpaired electron.} \]

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