Magnetic susceptibility and the spin-only formula

   We begin the discussion of magnetochemistry with the socalled spin-only formula, an approximation that has limited, but useful, applications. Paramagnetism arises from unpaired electrons. Each electron has a magnetic moment with one component associated with the spin angular momentum of the electron and (except when the quantum number l = 0) a second component associated with the orbital angular momentum. For many complexes of first row d-block metal ions we can ignore the second component and the magnetic moment, μ , can be regarded as being determined by the number of unpaired electrons, n (equations 1.1 and 1.2). The two equations are related because the total spin quantum number S = n/2.

                                  (1.1)

                                  (1.2)

   The effective magnetic moment, μ_eff, can be obtained from the experimentally measured molar magnetic susceptibility,

مواضيع ذات صلة

ايجاد الصيغة التركيبية للمعقدات

معقدات الخارصين

معقدات النحاس

كيمياء ومعقدات بعض عناصر السلسلة الانتقالية الاولى

تعريف المركبات المعقدة

Crystal Field Stabilization Energies

Colors of Transition-Metal Complexes

The Nature of the Ligands

Principal Quantum Number of the Metal

Charge on the Metal Ion

Factors That Affect the Magnitude of Δo

Electronic Structures of Metal Complexes