Which of the following are inner-orbital (d^2sp^3) octahedral complexes? (Assume F- and NH3 on Ni^2+ are not strong enough to pair electrons.)

JEE Main levelOne or more correct optionsDifficulty 2 of 3cc181

Which of the following are inner-orbital ( $d^{2} s p^{3}$ ) octahedral complexes? (Assume $F X^{-}$ and $NH X_{3}$ on $Ni X^{2 +}$ are not strong enough to pair electrons.)

Cr X^{3 +}

(

d^{3}

) leaves two

3 d

orbitals empty, so it is inner orbital.

Fe X^{2 +}

(

d^{6}

) with

CN X^{-}

pairs up to

t_{2 g}^{6}

, so it is inner orbital.

[FeF X_{6}] X^{3 -}

is high spin (

s p^{3} d^{2}

) and

Ni X^{2 +}

(

d^{8}

) cannot free two

3 d

orbitals, so

[Ni (NH X_{3}) X_{6}] X^{2 +}

s p^{3} d^{2}

. Correct: options 1 and 2.