Q47Multiple choice
Using valence bond theory, explain the following in relation to the complexes given below: 3– 3+ 3+ 4– [Mn(CN)6] , [Co(NH3)6] , [Cr(H2O)6] , [FeCl6]
- (i)Type of hybridisation.
- (ii)Inner or outer orbital complex.
- (iii)Magnetic behaviour.
- (iv)Spin only magnetic moment value.
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[Mn (CN)6] Mn3+ = 3d (i) d sp3 (ii) Inner orbital complex (iii) Paramagnetic (iv) 2(2 + 2) = 8 = 2.87 BM 3+ [Co(NH3)6] Co3+ = 3d6 (i) d sp3 (ii) Inner orbital complex (iii) Diamagnetic (iv) Zero 3+ [Cr(H2O)6] Cr3+ = 3d3 (i) d sp3 (ii) Inner orbital complex (iii) Paramagnetic (iv) 3.87 BM 131 Coordination Compounds 4– [Fe(Cl)6] Fe2+ = 3d6 (i) sp3d (ii) Outer orbital complex (iii) Paramagnetic (iv) 4.9 BM