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The number of complexes from the following with no electrons in the t2g orbital is ______. TiCl4, [MnO4]-, [FeO4]2-, [FeCl4]2-, [CoCl4]2-

1. 3
2. 1
3. 4
4. 2

Correct answer: 1

Solution

Only one complex, [MnO4]-, has no electrons in the t2g orbital, as it is a high-spin complex with all d electrons in the eg orbitals, while the others have d electrons occupying the t2g orbitals.

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