120318 Finish CFT and start Solid State.pdf - Material on Transition Metals for Final Exam Office Hours this week Chem 159 Wed 12/5 1-2pm Chem 161 Thur

120318 Finish CFT and start Solid State.pdf - Material on...

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Material on Transition Metals for Final Exam Office Hours this week: Chem 159 Wed 12/5 1-2pm Chem 161 Thur 12/6 5:30-6:30p Chem 159 Fri 12/6 6-7p Online discussion will be opened. Practice Final posted Wednesday (hopefully) You are responsible for questions that appear in MT1, 2, practices, optional HW questions, JIT questions, in-class exercises Please take advantage of resources in Canvas Videos, keys, lectures slides, supplements
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blue green high spin low spin
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[Co(CN) 6 ] 3- : Octahedral Co 3+ [Fe(H 2 O) 6 ] 2+ : Octahedral Fe 2+ [CoF 6 ] 3- : Octahedral Co 3+ paramagnetic paramagnetic diamagnetic Does this make sense with these three examples? On your own after class: what do these CFT splitting diagrams look like? nature of ligand (Spectrochemical Series) I - < Br - < Cl - < NO 3 - < F - < OH - < H 2 O < NH 3 < NO 2 - < PPh 3 < CN - » CO Weak field ligands D oct increases Strong field ligands
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Why are the intensities of the absorption spectra for the cobalt complexes different? [ CoCl 4 ] 2- [Co(H 2 O) 6 ] 2+ Geometries matter
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Drierite Dry and Wet [Co(H 2 O) 6 ]]Cl 2 Co[CoCl 4 ]
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s p a 1 t 2 e t 2 * t 2 a 1 * D T d M 4L Tetrahedral complex ML 4 : T d a 1 + t 2 a 1 + t 2 a 1 e + t 2
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Tetrahedral Complexes by Crystal Field Approach tetrahedral Tetrahedral complexes are (usually) high-spin due to small Δ! Δ T, Δ tet, Δ Td are all the same thing and is equal to (4/9)Δ O
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Crystal field splitting: Octahedral versus Tetrahedral
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specific for the case of d 8 generally low-spin Crystal Field Approach to Square Planar
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Square Planar Complexes D 4 h
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Jahn Teller Distortions
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Summary of d-orbital Splittings by Shape Know these for the Final Exam (QA6 in Optional HW 7)
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Material on Transition Metals for Final Exam Optional HW 7 Part A except QA2 and QA7 Understand how pi bonding affects octahedral MO diagram The following information will be provided if needed: Spectrochemical series Table of ligands Color wheel
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  • Fall '08
  • SUSANKAUZLARICH

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