Chemistry - Coordination Chemistry Question with Solution | TestHub

(A) ${\mathrm{Fe}}^{+2}\&{\mathrm{NO}}^{+}$ions present in sodiumnitroprusside complex

${\mathrm{Fe}}^{+2}\to 3{\mathrm{d}}^6$ (S.F.L) $\Rightarrow {\mathrm{t}}_{2\mathrm{g}}^6{\mathrm{e}}_{\mathrm{g}}^0$

no unpaired ${\mathrm{e}}^{-}$present

so, ${\mu }_{\mathrm{m}}=0$

(B) Brown ring complex contain

${\mathrm{Fe}}^{+}\&{\mathrm{NO}}^{+}$

$3{\mathrm{d}}^7$ (WFL) $\Rightarrow {\mathrm{t}}_{2\mathrm{g}}^5{\mathrm{e}}_{\mathrm{g}}^2$

${\mu }_{\mathrm{m}}\sqrt{3(3+2)}=\sqrt{15}\mathrm{BM}$

(C) ${\mathrm{Ag}}^{+}\to 4{\mathrm{d}}^{10}$ no unpaired ${\mathrm{e}}^{-}$

so, $\mu =0$ diamagnetic

(D) ${\mathrm{Fe}}^{+2}:\to [\mathrm{Ar}]3{\mathrm{d}}^{6}4{\mathrm{s}}^0$

${\mathrm{CN}}^{-}\to$ S.F.L. so back pairing of $\mathrm{e}-\mathrm{s}$ will take place $\Rightarrow {\mathrm{t}}_{2\mathrm{g}}^6{\mathrm{e}}_{\mathrm{g}}^0$

$\mu =0$(Diamag.)

* Complexes havnig C.N. = 6 are octahedral