Chemistry - Coordination Chemistry Question with Solution | TestHub

(P) $[Fe(N{H}_3{)}_6]$²⁺: Fe²⁺ is a d⁶ high-spin complex ($t_{2g}^4{e}_g^2$) that follows the EAN rule ($26-2+12=36$), matching 1, 2, and 4.

(Q) $[Ni{F}_6]$²⁻: Ni⁴⁺ is a d⁶ low-spin diamagnetic complex ($t_{2g}^6{e}_g^0$) with a valency sum of $10$ ($4+6$), matching 2, 3, and 5.

(R) $[Co(H_{2}O{)}_6]$²⁺: Co²⁺ is a d⁷ high-spin paramagnetic complex ($t_{2g}^5{e}_g^2$), matching 1 and 2.

(S) $[Cr(H_{2}O{)}_6]$²⁺: Cr²⁺ is a d⁴ high-spin paramagnetic complex ($t_{2g}^3{e}_g^1$), matching 1.