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Chemistry
Which of the following descriptions about [FeCl6]4- is correct about the complex ion?
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Q. Which of the following descriptions about $[FeCl_{6}]^{4-}$ is correct about the complex ion?
Coordination Compounds
A
$sp^{3} d$, inner orbital complex, diamagnetic
12%
B
$sp^{3} d^{2}$, outer orbital complex, paramagnetic
41%
C
$d^{2} sp^{3}$ , inner orbital complex, paramagnetic
28%
D
$d^{2} sp^{3}$ , outer orbital complex, diamagnetic
19%
Solution:
In $[FeCl_{6}]^{4-}$ oxidation state of $Fe = +2, Fe^{2+ } = 3d^{6}$
$[FeCl_{6}]^{4-}$ :
Paramagnetic due to presence of four unpaired electrons.