1. Coordination Chemistry ligands bonding to metals

2. Donor-Acceptor Complexes

3. Definitions Lewis Acid = acceptor = usually a transition metal cation Lewis Base = donor = ligand = usually something with a lone electron pair Coordination number = # of metal-ligand attachments Denticity = # of attachments a ligand makes

4. Common Ligands Monodentate Ligands: Halides: F -, Cl -, Br -, I - O 2-, S 2-, OH -, CN - NH 3, H 2 O, CO Bidentate Ligands:Polydentate Ligands: heme, salen

5. Monodentate complexes

7. Bidentate ligand complexes Ni(DMG) 2 Co(en) 2 Cl 2

8. Bidentate complexes Co(en) 3 2+ Fe(phen) 3 2+

9. Polydentate complexes Co(salen) + chlorophyll

10. Polydentate complexes Fe-heme O 2 -Fe-heme

11. Geometric isomerism

12. Fac- isomer Mer- isomer