The d electronic configurations of Cr 2+ , Mn 2+ , Fe 2+ and Ni 2+ are 3d 4 , 3d 5 , 3d 6…
Chemistry · JEE Advanced · NTA Exams — Coordination Compounds
The d electronic configurations of Cr2+, Mn2+, Fe2+ and Ni2+ are 3d4, 3d5, 3d6 and 3d8 respectively. Which one of the following aqua complexes will exhibit the minimum paramagnetic behaviour?
- \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\)
- \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\)
- \(\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\)
- \(\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\)
(At. No. Cr-24, Mn-25, Fe-26, Ni = 28)
Answer
(B) [ Ni ( H _ 2 O )_ 6 ]^ 2+
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