Which of the following does not obey the EAN | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

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

Vedclass · Accepted Answer

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

Vedclass · Answer

(A) The $EAN$ (Effective Atomic Number) rule states that the total number of electrons around the central metal atom in a complex should be equal to the atomic number of the next noble gas.$1$. For $[Cu(NH_3)_4]^{2+}$: Atomic number of $Cu = 29$. Oxidation state $= +2$. Electrons in $Cu^{2+} = 27$. Electrons from $4 \ NH_3$ ligands $= 4 	imes 2 = 8$. $EAN = 27 + 8 = 35$. This does not equal $36$ (Krypton).$2$. For $[Zn(OH)_4]^{2-}$: Atomic number of $Zn = 30$. Oxidation state $= +2$. Electrons in $Zn^{2+} = 28$. Electrons from $4 \ OH^-$ ligands $= 4 	imes 2 = 8$. $EAN = 28 + 8 = 36$.$3$. For $[HgI_4]^{2-}$: Atomic number of $Hg = 80$. Oxidation state $= +2$. Electrons in $Hg^{2+} = 78$. Electrons from $4 \ I^-$ ligands $= 4 	imes 2 = 8$. $EAN = 78 + 8 = 86$ (Radon).$4$. For $[Fe(CO)_5]$: Atomic number of $Fe = 26$. Oxidation state $= 0$. Electrons in $Fe = 26$. Electrons from $5 \ CO$ ligands $= 5 	imes 2 = 10$. $EAN = 26 + 10 = 36$ (Krypton).Thus,$[Cu(NH_3)_4]^{2+}$ does not obey the $EAN$ rule.

Which of the following does not obey the $EAN$ rule?

Similar Questions

Which of the following pairs of complexes have the same $EAN$ of the central metal atoms/ions?

For the complex $Cr(CO)_x$,find the value of $x$?

What is the $EAN$ of $Cr$ in $[Cr(SCN)_6]^{3-}$?

If $E.A.N.$ of central metal cation $M^{2+}$ in a non-chelating complex is $36$ and atomic number of metal $M$ is $26$,then the number of monodentate ligands in this complex are

Among $V(CO)_6$,$Cr(CO)_5$,$Cu(CO)_3$,$Mn(CO)_5$,$Fe(CO)_5$,$[Co(CO)_3]^{3-}$,$[Cr(CO)_4]^{4-}$,and $Ir(CO)_3$,the total number of species isoelectronic with $Ni(CO)_4$ is. . . . . [Given atomic number : $V=23$,$Cr=24$,$Mn=25$,$Fe=26$,$Co=27$,$Ni=28$,$Cu=29$,$Ir=77$ ]

Vedclass Test Series

Exam Paper Generator

Online Exam Module