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Magnetic moment has contributions from spin and orbital angular momentum. A non-spherical environment may lead to quenching of the contribution from orbital angular momentum. However, the spin-only magnetic moment survives in all cases and is related to the total number of unpaired electrons. μ eff = μ s.o = 2√S(S+1) = √n(n+2) BM
12 Ιουλ 2023 · Magnetic Moments of Molecules and Ions. Experimental evidence of magnetic measurements supports the theory of high- and low-spin complexes. Remember that molecules such as O 2 that contain unpaired electrons are paramagnetic. Paramagnetic substances are attracted to magnetic fields.
A common laboratory procedure for the determination of the magnetic moment for a complex is the Gouy method which involves weighing a sample of the complex in the presence and absence of a magnetic field and observing the difference in weight. A template is provided for the calculations involved.
Magnetic Properties of Coordination Compounds. An interesting characteristic of transition metals is their ability to form magnets. Metal complexes that have unpaired electrons are magnetic. Since the last electrons reside in the d orbitals, this magnetism must result from unpaired d electrons.
The experimental magnetic moment value of a given complex compound can be used to determine the number of unpaired electrons occupying the d-orbitals of the central metal ion of a given complex compound.
In order to obtain the magnetic moment of the metal ion alone, we must correct for the diamagnetic effects of the ligands (and strictly also for the inner-core diamagnetism of the metal ion).
Magnetic Moments of Molecules and Ions. Experimental evidence of magnetic measurements supports the theory of high- and low-spin complexes. Remember that molecules such as O 2 that contain unpaired electrons are paramagnetic. Paramagnetic substances are attracted to magnetic fields.
