Which of the following given complex has crystal field splitting energy (Δo) = 0 (1) [Fe(en)3]Br2

Question

Which of the following given complex has crystal field splitting energy \((\Delta _o) = 0\)

(1) \([Fe(en)_3]Br_2\)

(2) \([Fe(NH_3)_6]Br_2\)

(3) \(K_4[Fe(CN)_6]\)

(4) \(K_3[Fe(SCN)_6]\)

Answer 1

Correct option is : (4) \(K_3[Fe(SCN)_6]\) 

\(K_3[Fe(SCN)_6]\) 

\(Fe^{+3}: 3d^5\)