If Hund's rule is violated,then select the CO | vedclass

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

Question

(B) The atomic number of $Ni$ is $28$. The electronic configuration of $Ni^{2+}$ is $[Ar] 3d^8$.If $Hund's$ rule is violated,the $8$ electrons in the

Vedclass · Accepted Answer

$d^2sp^3$,diamagnetic

Vedclass · Answer

(B) The atomic number of $Ni$ is $28$. The electronic configuration of $Ni^{2+}$ is $[Ar] 3d^8$.If $Hund's$ rule is violated,the $8$ electrons in the $3d$ orbitals would pair up in the lower energy orbitals first.Specifically,the $3d$ orbitals would be filled as: $(d_{xy})^2 (d_{yz})^2 (d_{zx})^2 (d_{x^2-y^2})^2 (d_{z^2})^0$.This leaves two inner $d$-orbitals ($d_{x^2-y^2}$ and $d_{z^2}$) vacant.These two vacant $d$-orbitals,along with one $4s$ and three $4p$ orbitals,undergo $d^2sp^3$ hybridization.Since all electrons are paired in this configuration,the complex becomes diamagnetic.Therefore,the correct statement is $d^2sp^3$ and diamagnetic.

List-$I$ (Complex/Species)	List-$II$ (Shape and magnetic moment)
$A$. $[Ni(CO)_4]$	$I$. Tetrahedral,$2.8 \ BM$
$B$. $[Ni(CN)_4]^{2-}$	$II$. Square planar,$0 \ BM$
$C$. $[NiCl_4]^{2-}$	$III$. Tetrahedral,$0 \ BM$
$D$. $[MnBr_4]^{2-}$	$IV$. Tetrahedral,$5.9 \ BM$

If $Hund's$ rule is violated,then select the $CORRECT$ statement regarding $[Ni(NH_3)_6]^{2+}$:

Similar Questions

Nickel $(Z = 28)$ forms a paramagnetic complex $[NiX_4]^{2-}$ with a uninegative monodentate ligand $X^-$. The number of unpaired electrons in nickel and the geometry of this complex ion are,respectively:

Which $d-$orbital of metal in $[Fe(CO)_5]$ is involved in hybridisation?

Which of the following electronic configurations shall form an octahedral complex?

On the basis of valence bond theory,discuss the geometrical shapes and magnetic properties of the following $4$-coordinated complexes:
$(i)$ $[NiCl_{4}]^{2-}$
$(ii)$ $[Ni(CN)_{4}]^{2-}$
$(iii)$ $[Ni(CO)_{4}]$
$(iv)$ $MnO_{4}^{-}$

Vedclass Test Series

Exam Paper Generator

Online Exam Module