The atomic number of Mn,


The atomic number of Mn, Fe and Co are 25, 26 and 27 respectively. Which of the following inner orbital octahedral complexions are diamagnetic?

(i) [Co(NH3)6]3+

(ii) [Mn(CN)6]3–

(iii) [Fe(CN)6]4–

(iv) [Fe(CN)6]3–


Option (i) [Co(NH3)6]3+ and (iii) [Fe(CN)6]4– are the answers.

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