Coordination CompoundHard

Question

Which of the following is greatest paramagnetic ?

Options

A.Cu+
B.Fe2+
C.Fe3+
D.Cu2+

Solution

The paramagnerticcharacter is exhibitedby species having unpaired electrons. Furtherparamagnetic character is directly proportional to number of unpaired electrons.
      Configuration       Unpaired electron
Cu+[Ne]3s2p6d10             0
CU2+[Ne]3s2p6d10          1
Fe2+[Ne]3s2p6d6             4
Fe3+[Ne]3s2p6d5             5

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