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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 :Fe is in +3 oxidation STATE in both compounds with the configuration `3d^(5)`. In the PRESENCE of strong `CN^(-)` ligand, 3d electrons pair up leaving only one unpaired electron. The hybridisation is `d^(2)sp^(3)` forming inner ORBITAL complex. In the presence of weak `H_(2)O` ligand, 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. | |