Question

Which one of the following complexes would exhibit the lowest value of paramagnetic behaviour?

• A. [Co(CN)6]3–
• B. [Fe(CN)6]3–
• C. [Mn(CN)6]3–
• D. [Cr(CN)6]3–

Answer 1

Answer: (A)

$Co(CN)6$3–

Answer 2

[Co(CN)6]3– ;

n = 0

CN– is strong field ligand ; so it compels for pairing of electrons.