Correct order of spin only magnetic moment of the following complex ions is: (Given At.no. Fe: 26, Co:27) (A) [FeF6]3– [Co(C2O4)3]3– [CoF6]3– (B) [Co(C2O4)3]3– [CoF6]3– [FeF6]3– (C) [FeF6]3–

Question

Correct order of spin only magnetic moment of the following complex ions is: (Given At.no. Fe: 26, Co:27)

(A) [FeF6]3– > [Co(C2O4)3]3– > [CoF6]3–
(B) [Co(C2O4)3]3– > [CoF6]3– > [FeF6]3–
(C) [FeF6]3– > [CoF6]3– > [Co(C2O4)3]3–
(D) [CoF6]3– > [FeF6]3– > [Co(C2O4)3]3–

Prashant Kotian · Accepted Answer

Correct answer: C. Complex Central Metal ion E. C. NO. of unpaired electron Magnetic moment  = BM ) n ( n  (1) [FeF6]3– Fe3+–3d5– 1,1 eg 1,1,1 g 2 , t BM (2) [CoF6]3– Co3+–3d6– 1,1 eg 1,1,2 g , t BM (3) [Co(C2O4)3]3– Co3+–3d6– , eg , ,2 g , t 0 BM

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