(a) Electronic configuration of
Ti3+ in
[Ti(NH3)6]3+ Ti3+ =
3d1 ;
3d :
4s:
4p :
:
s2sp3 hybridisation
(b) Electronic configuration of
Cr3+ in
[Cr(NH3)6]3+ Cr3+ =
3d3 ;
3d
4s :
4p :
:
d2sp3 hybridisation
(c) Electronic configuration of
Co3+ in
[Co(NH3)6]3+ ;
Co3+ =
3d6 3d :
4s :
4p :
In the presence of strong field ligand
NH3, pairing of electrons takes place and hence, octahedral complex,
[Co(NH3)6]3+ is diamagnetic.
[Co(NH3)6]3+ [inner orbital or low spin complex] (
6NH3 molecules)
(d)Electronic configuration of
Zn+ in
[Zn(NH3)6]2+ Zn2+ =
3d10;
3d :
4s :
4p :
4d :
:
sp3d2 hybridisation
∴
[Zn(NH3)6]2+ is an outer orbital complex and is diamagnetic.