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Question
Which one of the following cyanido complexes would exhibit the lowest value of paramagnetic behaviour?
(Atomic no. Cr = 24, Mn = 25, Fe = 26, Co = 27)
Options
[Co(CN)6]3−
[Fe(C2O4)3]3−
[Mn(CN)6]3−
[Cr(CN)6]3−
MCQ
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Solution
[Co(CN)6]3−
Explanation:
The electronic structures of central metal ions in the complexes are shown below:
The complex [Co(CN)6]3− exhibits the least paramagnetic behaviour due to the absence of unpaired electrons. It’s actually diamagnetic in nature.
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