For the complex compounds listed below, match each complex in Column-I with the central metal ion in Column-II and the magnetic/spin property in Column-III. Column-I: (I) [M(CN)6]ⁿ+/- (II) [M(en)3]ⁿ+/- (III) [M(NH3)6]ⁿ+/- (IV) [M(H2O)6]ⁿ+/-. Column-II: (P) Cr3+ (Q) Fe2+ (R) Mn2+ (S) Co3+.

Question

For the complex compounds listed below, match each complex in Column-I with the central metal ion in Column-II and the magnetic/spin property in Column-III. Column-I: (I) [M(CN)6]ⁿ+/- (II) [M(en)3]ⁿ+/- (III) [M(NH3)6]ⁿ+/- (IV) [M(H2O)6]ⁿ+/-. Column-II: (P) Cr3+ (Q) Fe2+ (R) Mn2+ (S) Co3+. Column-III: (i) inner orbital complex (IOC) (ii) outer orbital complex (OOC) (iii) high spin (iv) low spin. Which of the following is the correct match?

Accepted Answer

III - Q - ii. [Fe(NH3)6]2+ (III-Q) has NH3 as the ligand around Fe2+ (d6). NH3 is a moderately strong field ligand but for Fe2+ it forms an outer orbital (high spin) complex, making it OOC. Hence III-Q-ii is correct.

Solution

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