Complex compounds(s) which is optical active and does not depend upon the orientation of the ligands around metal cation :
(i) [CoCl3(NH3)3] (ii) [Co(en)3]Cl3
(iii) [Co(C2O4)2(NH3)2]- (iv) [CrCl

Question

Complex compounds(s) which is optical active and does not depend upon the orientation of the ligands around metal cation :
(i) [CoCl3(NH3)3] (ii) [Co(en)3]Cl3
(iii) [Co(C2O4)2(NH3)2]- (iv) [CrCl2(en)2]+

Prashant Kotian · Accepted Answer

Correct answer: D. Step 1: Both complexes have the same octahedral geometry and are complexes of Fe^2+ with 6 d-electrons. Step 2: [Fe(H2O)6]^2+ uses weak-field H2O, giving a high-spin state with 4 unpaired electrons and a pale green colour. [Fe(CN)6]^4- uses strong-field CN^-, giving a low-spin state with 0 unpaired electrons (diamagnetic) and a yellow colour. Step 3: Thus, they differ in their magnetic moments and colours, making option (c) the correct choice.

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