The EAN of cobalt is 36 in [Co(NH_3)_2O_2(en) | vedclass

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(C) The $EAN$ (Effective Atomic Number) is calculated as: $EAN = Z - 	ext{oxidation state} + 2 	imes 	ext{coordination number}$.Given $EAN = 36$ an

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peroxide ion

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(C) The $EAN$ (Effective Atomic Number) is calculated as: $EAN = Z - 	ext{oxidation state} + 2 	imes 	ext{coordination number}$.Given $EAN = 36$ and $Z = 27$ for $Co$.Let the charge on $O_2$ be $x$. The total charge on the complex is $0$.$Co + 2(NH_3) + x + (en) + Cl = 0$$Co + 0 + x + 0 - 1 = 0 \Rightarrow Co = 1 - x$.Substituting into $EAN$ formula: $36 = 27 - (1 - x) + 2 	imes 6 = 27 - 1 + x + 12 = 38 + x$.$36 = 38 + x \Rightarrow x = -2$.Since the charge on $O_2$ is $-2$,it is a peroxide ion $(O_2^{2-})$.

The $EAN$ of cobalt is $36$ in $[Co(NH_3)_2O_2(en)Cl]$. Thus,$O_2$ is

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