(Form-I & Form-II are orientations of magnetic field lines of sample species) Consider the following complexes: [ C o ( CN ) 6 ] 4 − , [ C r ( CO ) 6 ] , K₂MnO₄, O₂ [ N i ( CO ) 4 ] , Na₄ [ F e

Question

(Form-I & Form-II are orientations of magnetic field lines of sample species) Consider the following complexes:

$[C o (CN)_{6}]^{4 -}$ , $[C r (CO)_{6}]$ , K₂MnO₄, O₂

$[N i (CO)_{4}]$ , Na₄ $[F e (CN)_{5} NOS]$ , O₃

Trans- $[N i C l_{2} (N H_{3})_{2}]$ , cis- $[PtC l_{2} (N H_{3})_{2}]$

Na₂ $[F e (CN)_{5} NO]$ , AlO₂⁻, $[M n (N H_{3})_{6}]^{2 +}$

Where $X$ = Number of species following the Form-I pattern

$Y$ = Number of species following the Form-II pattern

Find the value of $∣ X - Y ∣$ .

TestHub · Accepted Answer

Form-I represents paramagnetic species (magnetic field lines are attracted inside), while Form-II represents diamagnetic species (lines are repelled).

Paramagnetic species ( $X = 4$ ): $[C o (CN)_{6}]^{4 -}$ , O₂, $t r an s - [N i C l_{2} (N H_{3})_{4}]$ , and $[M n (N H_{3})_{6}]^{2 +}$ (all contain unpaired electrons).

Diamagnetic species ( $Y = 8$ ): $[C r (CO)_{6}]$ , KMnO₄, $[N i (CO)_{4}]$ , Na₂ $[F e (CN)_{5} NOS]$ , O₃, $c i s - [PtC l_{2} (N H_{3})_{2}]$ , Na₂ $[F e (CN)_{5} NO]$ , and AlO₂⁻ (all electrons are paired).

Calculation: $∣ X - Y ∣ = ∣4 - 8∣ = 4$ .

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