27 - Chemistry 1000 Lecture 27: Coordination chemistry,...

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Unformatted text preview: Chemistry 1000 Lecture 27: Coordination chemistry, structure and isomerism Marc R. Roussel Common monodentate ligands Monodentate: literally, having one ‘tooth’ I These are ligands that coordinate only once to a metal. Formula Name as ligand F- fluoro Cl- chloro Br- bromo I- iodo O 2- oxo OH- hydroxo CN- cyano H 2 O aqua NH 3 ammine CO carbonyl Common polydentate ligands Bidentate: coordinates twice to a metal, i.e. can donate lone pairs from two different atoms Polydentate: coordinates more than once to a metal Denticity: number of donor atoms in a ligand through which it coordinates Structure Denticity Abbreviation Name as ligand (bridging) :O: C :O: O .. 2- .. .. .. 1 or 2 (2 or 3) CO 2- 3 carbonato C C :O: :O: :O: :O: .. 2- .. 2 (3 or 4) ox 2- oxalato N 2 H C N H 2 H 2 .. 2 C .. H 2 en ethylenediamine N N .. .. 2 phen 1,10-phenanthroline 2 H 2 CH 2 CH C :O: C C 2 H 2 H C O: :O: C O: :O: N CH2 N C :O :O: C :O .. 4- .. .. .. .. .. .. .. .. .. 6 EDTA 4- You don’t want to know. Carbonate as a ligand M O C O O 2- M O O C O 2- C O O M M O 2- O C M M O: :O 2- .. .....
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This note was uploaded on 03/03/2012 for the course CHEM 1000 taught by Professor Marc during the Fall '06 term at Lethbridge College.

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27 - Chemistry 1000 Lecture 27: Coordination chemistry,...

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