Question

Using Valence bond theory, explain the following in relation to the paramagnetic complex [Mn(CN)₆]^3-

a. type of hybridization

b. magnetic moment value

c. type of complex – inner, outer orbital complex

Answer 1

[Mn(CN)₆]^3-

Mn = [Ar] 3d⁵4s²

Mn³⁺ = [Ar]3d⁴

Mn (ground state)

Type of hybridization – d²sp³ 

Magnetic moment value – √n(n+2) = √(2(2+2)) = 2.87BM

(n= no. of unpaired electrons)

Type of complex – inner orbital