Which of the following complexes would undergo Jahn-Teller distortion? In each case,justify your answer (ligand? spin state? degeneracy?)a. [Cr(NH3)6]³+b. [Cr(H2O)6]]²+c. [Cr(CN)6]4d. [Ni(NH3)6]²+

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Answered: Which of the following complexes would…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter20: Chemistry Of Selected Transition Elements And Coordination Compounds

Section20.7: Crystal-field Theory: Color And Magnetism In Coordination Compounds

Problem 20.13CE

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Experiments show that K4[Cr(CN)6] is paramagnetic and has two unpaired electrons. The related complex K4[Cr(SCN)6] is paramagnetic and has four unpaired electrons. Account for the magnetism of each compound using the ligand field model. Predict where the SCN ion occurs in the spectro-chemical series relative to CN.
Four different octahedral chromium coordination compounds exist that all have the same oxidation state for chromium and have H2O and Cl as the ligands and counterions. When 1 mole of each of the four compounds is dissolved in water, how many moles of silver chloride will precipitate upon addition of excess AgNO3?
What types of isomers are possible for the following compounds or complex ions? (a) K[Co(NH3)2Cl4] (b) Pt(en)Cl2 (square-planar) (c) [Co(NH3)5Cl]2+ (d) [Ru(phen)3]Cl3 (e) Na2[MnCl4] (tetrahedral) (f) [Co(NH3)5NO2)2+
Sketch and explain the most likely crystal field diagram for the following complex ion: Note: The CN ligand produces a much stronger crystal field than NH3. Assume the NH3 ligands lie on the z axis.
For each d electron configuration, state the number of unpaired electrons expected in octahedral complexes. Give an example complex for each case. (Two answers are possible for some of these cases.) (a) d2 (b) d4 (c) d6 (d) d8

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Which of the following complexes would undergo Jahn-Teller distortion? In each case, justify your answer (ligand? spin state? degeneracy?) a. [Cr(NH3)6]³+ b. [Cr(H2O)6]]²+ c. [Cr(CN)6]4 d. [Ni(NH3)6]²+