1.

Using valence bond theory, explain the following in relation to the complexes given below : [Mn(CN)_(6)]^(3-),[Co(NH_(3))_(6)]^(3+),[Cr(H_(2)O)_(6)]^(3+), [FeCl_(6)]^(4-) (i) Type of hybridisation (ii) Inner or outer orbital complex (iii) Magnetic behaviour (iv) Sping only magnetic moment value

Answer»

Solution :
(`Cl^(-)` is a weak LIGAND. ELECTRONS do not pair up)
`sp^(3)d^(2)`, outer orbital complex, paramagnetic, `mu=sqrt(4(4+2))=4.9` BM


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