The spin-only magnetic moment value for the complex Co ( CN ) 6 4 - is...... BM . (nearest integer value) [At. no. of Co = 27 ]

Step-by-step solution

Co ( CN ) 6 4 - x + 6 × ( - 1 ) = - 4 x = + 2 Co 2 + : [ Ar ] 3   d 7 and CN - is a strong field ligand which can pair electron of central atom. It has one unpaired electron (n) in 4   d - subshell. So spin only magnetic moment ( μ ) = n ( n + 2 ) B · M where n = number of unpaired electrons. μ = 3 B . M μ = 1 . 73   BM   ≃ 2   BM