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Coordination and Oxidation Number

Which of the ...

Question

Which of the following option are correct for $[F e (C N)_{6}]^{3 -}$ complex?
(a) $d^{2} s p^{3}$ hybridisation
(b) $s p^{3} d^{2}$ hybridisation
(c) Paramagnetic
(d) Diamagnetic

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Solution

According to VBT, the molecular orbital electronic configuration of $F e^{3 -}$ in $[F e (C N)_{6}]^{3 -}$ is

Hybridisation = $d^{2} s p^{3}$
Number of unpaired electron =1
Magnetic property= Paramagnetic
Hence, correct choices are options (a) and (c).

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