First slide

Aplicaitons of VBT

Question

Which one of the following complex is diamagnetic

Moderate

A

$[Fe {(H_{2} O)}_{6}] {Cl}_{3}$
B

$K_{3} [{CrF}_{6}]$
C

$K_{3} [{MnCl}_{6}]$
D

$[Co {(en)}_{3}] {Cl}_{3}$

Solution

1) ${Fe}^{+ 3} . . . 3 d^{5}$
2) ${Cr}^{+ 3} . . . 3 d^{3}$
3) ${Mn}^{+ 3} . . . 3 d^{4}$
4) ${Co}^{+ 3} . . . 3 d^{6}$

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