The number of complexes from the following with no electrons in the orbital is

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Q.
The number of complexes from the following with no electrons in the $t_{2}$ orbital is _______ .

${TiCl}_{4}, {[{MnO}_{4}]}^{-}, {[{FeO}_{4}]}^{2 -}, {[{FeCl}_{4}]}^{-}, {[{CoCl}_{4}]}^{2 -}$ [2024]

1 1

2 4

3 2

4 3

Ans.
(4)

Compound Electronic configuration
of central atom without
tetrahedral splitting Electronic configuration
of central atom after
tetrahedral splitting

${TiCl}_{4}$ ${Ti}^{ü +} = {}_{18}{[Ar]} 3 d 4 s$ $e^{0} t_{2}^{0}$

${MnO}_{4}^{-}$ ${Mn}^{7 +} = {}_{18}{[Ar]} 3 d^{0} 4 s^{0}$ $e^{0} t_{2}^{0}$

${FeO}_{4}^{2 -}$ ${Fe}^{6 +} = {}_{18}{[Ar]} 3 d^{2} 4 s^{0}$ $e^{2} t_{2}^{0}$

${FeCl}_{4}^{-}$ ${Fe}^{2 +} = {}_{18}{[Ar]} 3 d^{6} 4 s^{0}$ $e^{3} t_{2}^{3}$

${CoCl}_{4}^{2 -}$ ${Co}^{2 +} = {}_{18}{[Ar]} 3 d^{7} 4 s^{0}$ $e^{4} t_{2}^{3}$

Three complexes donot have electron in $t_{2}$ orbitals

Solution

Q.
The number of complexes from the following with no electrons in the $t_{2}$ orbital is _______ .

${TiCl}_{4}, {[{MnO}_{4}]}^{-}, {[{FeO}_{4}]}^{2 -}, {[{FeCl}_{4}]}^{-}, {[{CoCl}_{4}]}^{2 -}$ [2024]

1 1

2 4

3 2

4 3

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Compound	Electronic configuration of central atom without tetrahedral splitting	Electronic configuration of central atom after tetrahedral splitting
${TiCl}_{4}$	${Ti}^{ü +} = {}_{18}{[Ar]} 3 d 4 s$	$e^{0} t_{2}^{0}$
${MnO}_{4}^{-}$	${Mn}^{7 +} = {}_{18}{[Ar]} 3 d^{0} 4 s^{0}$	$e^{0} t_{2}^{0}$
${FeO}_{4}^{2 -}$	${Fe}^{6 +} = {}_{18}{[Ar]} 3 d^{2} 4 s^{0}$	$e^{2} t_{2}^{0}$
${FeCl}_{4}^{-}$	${Fe}^{2 +} = {}_{18}{[Ar]} 3 d^{6} 4 s^{0}$	$e^{3} t_{2}^{3}$
${CoCl}_{4}^{2 -}$	${Co}^{2 +} = {}_{18}{[Ar]} 3 d^{7} 4 s^{0}$	$e^{4} t_{2}^{3}$

Solution

Q. The number of complexes from the following with no electrons in the t2 orbital is _______ . TiCl4,[MnO4]-,[FeO4]2-,[FeCl4]-,[CoCl4]2- [2024]

1 1

2 4

3 2

4 3

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Q.
The number of complexes from the following with no electrons in the $t_{2}$ orbital is _______ .

${TiCl}_{4}, {[{MnO}_{4}]}^{-}, {[{FeO}_{4}]}^{2 -}, {[{FeCl}_{4}]}^{-}, {[{CoCl}_{4}]}^{2 -}$ [2024]