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Give the electronic configuration of the...

Give the electronic configuration of the following complexes on the basis of crystal field splitting theory. `[CoF_(6)]^(3-),[Fe(CN)_(6)]^(4-)and[Cu(NH_(3))_(6)]^(2+)`.

Text Solution

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According to spectrochemical series, ligands can be arranged in a series in the order of increasing field strength i.e. `F^(-)ltNH_(3)ltCN^(-)`.
Hence, `CN^(-)andNH_(3)` being strong field ligand pair up the `t_(2g)` electrons before filling `e_(g)` set.
In `[CoF_(6)]^(3-),Co^(3+)=d^(6)rArrt_(2g)^(4),e^(2)g`
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