Which of the following complex compounds will exhibit highest paramagnetic behaviour? (At. no. : Ti =22, Cr =24 , Co =27, Zn =30 )

Step-by-step solution

(A) Electronic configuration of Ti ³⁺ in [ Ti ( NH ₃ )₆ ]³⁺ (B) Electronic configuration of Cr ³⁺ in [ Cr ( NH ₃ )₆ ]³⁺ (C) Electronic configuration of Co ³⁺ in [ Co ( NH ₃ )₆ ]³⁺ : In the presence of strong field ligand NH ₃ , pairing of electrons takes place and thus, octahedral complex, [ Co ( NH ₃ )₆ ]³⁺ is diamagnetic. [ Co ( NH ₃ )₆ ]³⁺ [ array l inner orbital or low spin complex array ] (6 NH ₃ molecules ) (D) Electronic configuration of Zn ²⁺ in [ Zn ( NH ₃ )₆ ]²⁺ : [ Zn ( NH ₃ )₆ ]²⁺ is an outer orbital co