Which of the following complex is an outer orbital complex?
A
[Ni(NH3)6]2+
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B
[Mn(CN)6]4−
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C
[Co(NH3)6]3+
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D
[Fe(CN)6]4−
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Solution
The correct option is B[Ni(NH3)6]2+ The central metal ions in [Ni(NH3)6]2+,[Mn(CN)6]4−,[Co(NH3)6]3+and[Fe(CN)6]4− 8, 5, 6 and 6 d electrons respectively.
The central metal atom in the complexes [Mn(CN)6]4−,[Co(NH3)6]3+and[Fe(CN)6]4− undergoes d2sp3 hybridization to form inner orbital or low spin or spin paired complex.
The central metal atom in [Ni(NH3)6]2+ undergoes sp3d2 hybridization to form outer orbital or high spin or spin paired complex.