Why transition metal show magnatic properties ??? Explain with example?
Answers
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Most of the transition elements show paramagnetic behavior. The unpaired electrons in (n-1) d orbitals are responsible for the magnetic properties. ... The magnetic properties decrease with the decrease in the number of unpaired electrons. The transition metals which contain paired electrons depict diamagnetic behavior.
As an example, Fe prefers to exist as Fe3+ and is known to have a coordination number of six. Since the configuration of Fe3+ has five d electrons, we would expect to see five unpaired spins in complexes with Fe. This is true for [FeF6]3-; however, [Fe(CN)6]3- only has one unpaired electron, making it a weaker magnet. This trend can be explained based on the properties of the ligands. We expect CN− to have a stronger electric field than that of F−, so the energy differences in the d orbitals should be greater for the cyanide complex.
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