Coordination CompoundMedium

Question

F2 is formed by reaccting by reaching K2MnF6 with :

Options

A.SbF5
B.MnF3
C.KSbF6
D.MnF4

Solution

SbF5, being the stronger lewis acid, displaces the weaker one (MnF4) from its salt. MnF4, being unstable, decomposes to give 4 MnF4 and fluorine.
K2MnF6 + 2SbF5 → 2SbF6 + MnF4
                                             Unstable
MnF4 → MnF3 + F2

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