Which of the following complexes does NOT obe | vedclass

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(D) The $EAN$ (Effective Atomic Number) rule states that the total number of electrons around the central metal ion in a complex should be equal to th

Vedclass · Accepted Answer

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

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(D) The $EAN$ (Effective Atomic Number) rule states that the total number of electrons around the central metal ion in a complex should be equal to the atomic number of the next noble gas.$1$. For $[Co(NH_3)_6]^{3+}$: $Co$ $(Z=27)$. $EAN = 27 - 3 + (6 	imes 2) = 36$ (Obeys $EAN$ rule).$2$. For $[Cr(CO)_6]$: $Cr$ $(Z=24)$. $EAN = 24 - 0 + (6 	imes 2) = 36$ (Obeys $EAN$ rule).$3$. For $[Zn(NH_3)_4]^{2+}$: $Zn$ $(Z=30)$. $EAN = 30 - 2 + (4 	imes 2) = 36$ (Obeys $EAN$ rule).$4$. For $[Cu(NH_3)_4]^{2+}$: $Cu$ $(Z=29)$. $EAN = 29 - 2 + (4 	imes 2) = 35$ (Does $NOT$ obey $EAN$ rule).Therefore,the correct option is $D$.

Which of the following complexes does $NOT$ obey the $EAN$ rule?

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