19.3 Spectroscopic and Magnetic Properties of Coordination Compounds
Crystal field splitting of d orbitals by geometry, high- versus low-spin configurations, and the colors and magnetic behavior that follow.
Chemistry 2e, 19.3 Spectroscopic and Magnetic Properties of Coordination Compounds
5 exercises
19.3 Exercise 4
The anhydrous solid CoCl2 is blue in color. Because it readily absorbs water from the air, it is used as a humidity indicator to monitor if equipment (such as a cell phone) has been exposed to excessive levels of moisture. Predict what product is formed by this reaction, and how many unpaired electrons this complex will have.
19.3 Exercise 6
How many unpaired electrons are present in each of the following?
(a) [CoF6]3− (high spin)
(b) [Mn(CN)6]3− (low spin)
(c) [Mn(CN)6]4− (low spin)
(d) [MnCl6]4− (high spin)
(e) [RhCl6]3− (low spin)
19.3 Exercise 8
For complexes of the same metal ion with no change in oxidation number, the stability increases as the number of electrons in the t2g orbitals increases. Which complex in each of the following pairs of complexes is more stable?
(a) [Fe(H2O)6]2+ or [Fe(CN)6]4−
(b) [Co(NH3)6]3+ or [CoF6]3−
(c) [Mn(CN)6]4− or [MnCl6]4−
19.3 Exercise 10
Would you expect the complex [Co(en)3]Cl3 to have any unpaired electrons? Any isomers?
19.3 Exercise 12
Would you expect salts of the gold(I) ion, Au+, to be colored? Explain.
Adapted from General Chemistry © 2019 Rice University. Licensed under CC BY 4.0. Sources: Chemistry 2e, Chemistry: Atoms First 2e. Imported at revision 32c7196.