The d-electron configurations of Mn2+,Fe2+,Co3+ and Ni2+are 3d5 , 3d6, 3d6, 3d8, respectively. Which of the following aqua complexes will exhibit the minimum paramagnetic behaviour?

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FeH2O62+

CoH2O63+

MnH2O62+

NiH2O62+

answer is B.

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Detailed Solution

CoH2O63+=d2sp3low spin, diamagnetic, magnetic moment - zero BM

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