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Complex Compounds:

Complex Compounds:. What are they: Central metal cation Attached ligands (molecules or anions) Coordination Number : defines the # ligands (Useful link) http://www.chem1.com/acad/webtext/chembond/cb09.html. Complex Compounds:. Cation : Lewis Acid (electron pair acceptor)

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Complex Compounds:

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  1. Complex Compounds: What are they: Central metal cation Attached ligands(molecules or anions) Coordination Number: defines the # ligands (Useful link) http://www.chem1.com/acad/webtext/chembond/cb09.html

  2. Complex Compounds: Cation: Lewis Acid (electron pair acceptor) Generally a transition metal cation Also common: Al, Sn, Pb Ligand: Lewis Base (electron pair donor) Common ligands: NH3, H2O CN-, Cl-, OH-

  3. Understanding net charge: Overall charge of coordinate compound/ion is determined by the sum of the charges on the metal and the attached groups. Ex: Al(NH3)6+3 Al (OH)6-3

  4. Coordination Geometry Guideline for common compounds/ions

  5. Nomenclature- complex compounds • Salts: name the cation first and then the anion • Complex ion or molecule: name the ligand first followed by metal • Table of common ligands: Example: [Cu(NH3)4]SO4 = tetraamminecopper(II) sulfate

  6. Colors and Coordination compounds • Attachment of ligands causes split of the electrons in the d-orbital to a low/high energy. • The energy separation (Δ) of these electrons provide unique colors: F-, Cl-,Br-< C2O42-< H2O< NH3<CN- • http://www.youtube.com/watch?v=cdRr12iJSWU • Many examples of color & coordinatecompounds: • http://www.youtube.com/watch?NR=1&feature=endscreen&v=RFwcdqkq1CI

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