1.

Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour?

Answer»

`[NI(NH_(3))_(6)]^(2+)`
`[Zn(NH_(3))_(6)]^(2+)`
`[Cr(NH_(3))_(6)]^(3+)`
`[Co(NH_(3))_(6)]^(3+)`

Solution :In `[Ni(NH_(3))_(6)]^(2+), Ni^(2+)` is `3D^(8)`. Its ELECTRONIC configuration is

Thus, hybridization is `sp^(3)d^(2)` giving outer ORBITAL complex which is paramagnetic.


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