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In coordination chemistry there are a variety of methods applied to find out the structure of complexes.One method involves treating the complex with known reagents and from the nature of reaction, the formula of the complex can be predicted.An isomer of the complex `Co(en)_2(H_2O)Cl_2Br`,on reaction with concentrated `H_2SO_4` (dehydrating agent) it suffers loss in weight and on reaction with `AgNO_3` solution it gives a white precipitate which is soluble in `NH_3`(aq). If all the ligands in the coordination sphere of the above complex be replaced by `F^(bar)`, then the magnetic moment of the complex ion (due to spin only) will be :A. 2.8 BMB. 5.9 BMC. 4.9 BMD. 1.73 BM |
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Answer» Correct Answer - C With `F^(-)` ligand, metal ion has electron configuration , `t_(2g)^(2,1,1)e_(g)^(1.1)` So, `mu=sqrt(4(4+2))~~4.9` B.M , where n=number of unpaired electrons |
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