Question

Explain [co(nh3)6]3+ is an inner orbital complex whereas [cof6]3- is an outer orbital complex

Answer 1

This complex uses inner d orbital (3d) for hybridisation. It is an inner orbital complex. It has no unpaired electrons. [Co(NH3)6]3+ is diamagnetic.

Answer 2

Answer: In [Co(NH3)6]3+ Co is in +3 state and has configuration 3d6. In the presence of NH3, 3d electrons pair up leaving two d-orbitals empty. Hence, the hybridization is d2sp3 forming and inner orbital complex. ... The hybridization is sp3d2 forming an outer orbital complex.