The octahedral diamagnetic low spin complex among the following is:

Question

Canvas Classes · Accepted Answer

Strategy:
 Filter the options for octahedral geometry, low spin nature, and diamagnetism (0 unpaired electrons).

Step 1: Evaluate the complexes
- : Hexacoordinate (Octahedral).  () with strong field  forms a low-spin complex (). It has 0 unpaired electrons, so it is diamagnetic.
- : Octahedral, but  is weak field  high-spin, paramagnetic.
- : Octahedral, but  is weak field  high-spin, paramagnetic.
- : Tetracoordinate (Tetrahedral), paramagnetic.

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