[Co(NH₃)₆]³⁺ is an inner orbital or low spin complex, using the inner d orbital (3d) in hybridization, while the paramagnetic complex [CoF₆]³⁻ is an outer orbital or high spin complex, utilizing the outer d orbital (4d) in hybridization.

The complex utilizes inner orbital (3d) hybridization, forming six pairs of electrons from NH₃ ligands in octahedral geometry, resulting in diamagnetism due to the absence of unpaired electrons.

The magnetic behavior of a complex can provide insights into its geometry; for example, diamagnetic complexes like [Co(NH₃)₆]³⁺ suggest octahedral geometry due to the absence of unpaired electrons.

Werner’s theory couldn’t explain the selective formation of coordination compounds by specific elements, the directional properties of their bonds, and their distinct magnetic and optical features.

Valence Bond Theory (VBT), Crystal Field Theory (CFT), Ligand Field Theory (LFT), and Molecular Orbital Theory (MOT) are among the approaches suggested to elucidate the nature of bonding in coordination compounds.