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| 1. |
[Fe(H_(2)O)_(6)]^(3+) is strongly paramagnetic whereas [Fe(CN)_(6)]^(3-) is weakly paramagnetic . Explain. |
| Answer» Solution :In both the complexes, `Fe` is in `+3` oxidation state with the CONFIGURATION `3d^(5)`. `CN^(-)` is a STRONG field ligand. In its presence , `3d` electrons pair up leaving only one unpaired electron. The hybridisation is `d^(2)sp^(3)` forming inner orbital COMPLEX. `H_(2)O` is a weak ligand. In its presence `3d` electrons do not pair up. The hybridisation is `sp^(3)d^(2)` forming an outer orbital complex containing five unpaired electrons, hence it is strongly paramagnetic. | |