Identify the homoleptic complex(es) that is/are low spin. (A) [ Fe ( CN )₅ NO ]²⁻ (B) [ CoF ₆ ]³⁻ (C) [ Fe ( CN )₆ ]⁴⁻ (D) [ Co ( NH ₃ )₆ ]³⁺ (E) [ Cr ( H ₂ O )₆ ]²⁺ Choose the correct answer from the options given below :

Step-by-step solution

(A) [ Fe ( CN )₅ NO ]⁻² Heteroleptic, Fe ⁺², 3 ~d ^6 , t _ 2 ~g ^6 e _ g ^0, ~d ^2 sp ^3 , Low spin ( 3 d series +SFL ) (B) [ CoF ₆ ]⁻³ Homoleptic, sp ^3 ~d ^2 , High spin, Co ⁺³, 3 ~d ^6(3 ~d series + WFL ) (C) [ Fe ( CN )₆ ]⁻⁴ Homoleptic Fe ⁺², 3 ~d ^6, ~d ^2 sp ^3, t _ 2 ~g ^6 eg ^0 Low spin (3 ~d series +SFL ) (D) [ Co ( NH ₃ )₆ ]⁺³ Homoleptic, Co ⁺³ 3 ~d ^6, ~d ^2 sp ^3 , t _ 2 ~g ^6 eg ^0 , Low spin (3d series + SFL) (E) [ Cr ( H ₂ O )₆ ]⁺² Homoleptic Cr ⁺² 3 ~d ^4, ~d ^2 sp ^3 , High spin t _ 2 ~g ^3 e _ g ^