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Cr(III)

Cr(III)

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Cr(III) acac = acaetylacetonate anion Cr(acac)3 Weak Field Strong Field I < Br <Cl < H20 < acac < NH3 < CN¯ < CO An Example Spectrochemical Series The acetylacetonate ligand is a common bidentate (binds in two places) ligand for metal complexes. It is shown here forming an octahedral complex with the Cr3+ metal ion. We have not discussed the Lewis acid/base properties of the (acac) ligand, so l've provided you with its location in an abbreviated spectrochemical series. While the overall symmetry does not match this, for the purposes of this problem we will treat the coordination environment as having O, symmetry.
Transcribed Image Text:Cr(III) acac = acaetylacetonate anion Cr(acac)3 Weak Field Strong Field I < Br <Cl < H20 < acac < NH3 < CN¯ < CO An Example Spectrochemical Series The acetylacetonate ligand is a common bidentate (binds in two places) ligand for metal complexes. It is shown here forming an octahedral complex with the Cr3+ metal ion. We have not discussed the Lewis acid/base properties of the (acac) ligand, so l've provided you with its location in an abbreviated spectrochemical series. While the overall symmetry does not match this, for the purposes of this problem we will treat the coordination environment as having O, symmetry.
Bidentate acac interaction with Cr(IIl) Cr(III) Shown is an MO of acac which contains 2 electrons. The light blue circle is meant to represent the location of a Cr(III) ion in a potential Lewis acid/base interaction. Note that because the acac' ligand is bidentate (binds to a metal in two locations), two metal-ligand interactions are shown. Each interaction is represented by a dotted line. Use this information to fill in the blanks in the following statements: In the interaction shown, acac- will act as the (Select ) and the Cr* acts as the ( Select] The best description for the type of metal-ligand interaction along the dashed line is (Select] Making this metal-ligand Interaction stronger will ISelect ] the octahedral splitting energy (Ao).
Transcribed Image Text:Bidentate acac interaction with Cr(IIl) Cr(III) Shown is an MO of acac which contains 2 electrons. The light blue circle is meant to represent the location of a Cr(III) ion in a potential Lewis acid/base interaction. Note that because the acac' ligand is bidentate (binds to a metal in two locations), two metal-ligand interactions are shown. Each interaction is represented by a dotted line. Use this information to fill in the blanks in the following statements: In the interaction shown, acac- will act as the (Select ) and the Cr* acts as the ( Select] The best description for the type of metal-ligand interaction along the dashed line is (Select] Making this metal-ligand Interaction stronger will ISelect ] the octahedral splitting energy (Ao).
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