Which of the following complexes does the cen | vedclass

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(B) The $EAN$ (Effective Atomic Number) rule states that the total number of electrons around the central metal ion should equal the atomic number of

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$[Cu(NH_3)_4]^{2+}$

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(B) The $EAN$ (Effective Atomic Number) rule states that the total number of electrons around the central metal ion should equal the atomic number of the next noble gas.$EAN = Z - 	ext{oxidation state} + 2 	imes (	ext{coordination number})$.For $A: [Zn(NH_3)_4]^{2+}: EAN = 30 - 2 + 8 = 36$ (Obeys rule).For $B: [Cu(NH_3)_4]^{2+}: EAN = 29 - 2 + 8 = 35$ (Does $NOT$ obey rule).For $C: [Pt(NH_3)_6]^{4+}: EAN = 78 - 4 + 12 = 86$ (Obeys rule).For $D: [Fe(CN)_6]^{4-}: EAN = 26 - 2 + 12 = 36$ (Obeys rule).Therefore,the complex that does not obey the $EAN$ rule is $[Cu(NH_3)_4]^{2+}$.

Which of the following complexes does the central metal ion $NOT$ obey the $EAN$ rule? (Atomic numbers: $Pt=78, Cu=29, Zn=30, Fe=26$)

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