Chem 202 - 16.11 Magnetic Properties of Complexes
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6 terms
Terms | Definitions |
|---|---|
Paramagnetic | A property of a substance with unpaired electrons; a paramagnetic object gets pulled into a magnetic field. |
Diamagnetic | A property of a substance with no unpaired electrons; a diamagnetic object gets pushed out of a magnetic field. |
The Magnetism of Complexes | Most complexes are paramagnetic to some degree, with at least one unpaired electron present. |
Weak-field ligands and Magnetism | Weak-field ligands will add one electron to each d-orbital before doubling up, and will tend to be strongly paramagnetic as a result. |
Strong-field ligands and Magnetism | Strong-field ligands will pair electrons in tg obitals before filling eg orbitals, and will tend to be weakly paramagnetic as a result. |
16.11 Summary | The magnetic properties of a complex depend on the magnitude of the ligand field splitting. Strong-field ligands tend to form low-spin, weakly paramagnetic complexes; weak-field ligands tend to form high-spin, strongly paramagnetic complexes. |
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