[orgoclear]

Is hexaaquachromium(III) cation an inner orbital complex or an outer orbital complex. I have read somewhere that as the crystal field splitting energy of water is quite less, the lone pairs of O cannot be accommodated in the inner d-(vacant orbitals) consequently forming an outer orbital complex with hybridisation sp3d2 istead of the expected d2sp3. Is this correct?

[xoto]

look for m.gerloch, e.c constable. transition metal chemistry-the valence shell in d-block chemistry. i believe this book will be helpful

[orgoclear]

can i have more views?

[renge ishyo]

Well, I can only add that the [Co(H₂0)₆]³⁺ ion is somewhat of a weirdo. It is the only first row transition metal that forms a low spin complex with the weak field H₂0 ligand (the other first row transition metals need a strong field ligand to form a low spin complex). Other than that, the book I used discouraged the use of hybrid orbitals when working with MO diagrams, so I am no help there