chapter 20 notes

chapter 20 notes - Chapter 20 Coordination Chemistry 2010...

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©2010 Donald L. Siegel, All Rights Reserved Chapter 20 Chapter 20 Coordination Chemistry
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©2010 Donald L. Siegel, All Rights Reserved Coordination Compounds Coordination Compounds W Transition metal ion plus ligands Complex ion With counter ions called a coordination compound W Coordination number The number of ligands (bonds) around the central metal ion Wide variety of coordination numbers possible. No way to predict.
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©2010 Donald L. Siegel, All Rights Reserved Ligands Ligands W Unidentate “One tooth” Include: NH 3 , H 2 O, ONO - , NO 2 - , CN - W Chelating Bidentate, polydentate – bind with more than one bond Include: - OCOCOO - (oxalate), H 2 NCH 2 CH 2 NH 2 (ethylenediamine “en”)
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©2010 Donald L. Siegel, All Rights Reserved Polydentate Polydentate ligands ligands O C C O O O N C H 2 C O O C H 2 CH 2 N CH 2 C O O C H 2 C O O CH 2 C O O Oxalate EDTA (E thlylened iamet etraa cetate)
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©2010 Donald L. Siegel, All Rights Reserved Nomenclature Nomenclature W Cation names first, then anion Sodium “complex anion” “Complex cation” chloride W Within the complex ion Ligands named first If the ligand is an anion, ends in “-o” Exceptions: NO Exceptions: NO 2 - - nitro, ONO nitro, ONO - - nitrito nitrito If ligand is neutral, name is used unaltered Exceptions: H Exceptions: H 2 O O – aqua, NO aqua, NO – nitrosyl nitrosyl , CO , CO - carbonyl carbonyl
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©2010 Donald L. Siegel, All Rights Reserved More nomenclature More nomenclature
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chapter 20 notes - Chapter 20 Coordination Chemistry 2010...

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