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Lecture 29 (21.4)

Lecture 29 (21.4) - Naming Coordination Compounds The...

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Naming Coordination Compounds 1. The cation is named before the anion. 2. The ligands are named before the metal ion. 3. An o is added to the root name of an anionic ligand, for a neutral ligand the name of the molecule is used with a few exceptions: H 2 O = aqua; NH 3 = ammine; CH 3 NH 2 = methylamine; CO = carbonyl; NO = nitrosyl. 4. The prefixes mono-, di-, tri-, tetra-, penta-, and hexa- are used to denote the number of simple ligands.
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Naming Coordination Compounds 5. The prefixes bis-, tris-, and tetrakis- are used for complicated ligands (polydentate), or ones that already contain di- and tri-. 6. The oxidation state of the metal ion is designated by a Roman numeral in parentheses. 7. When more than one type of ligand is present, they are listed alphabetically. 8. If the complex has a negative charge, the suffix –ate is added to the name of the metal.
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Latin Names y When some metal ions are involved in anionic complex ions we have to use their latin names: Stannate Tin (Sn) Aurate Gold (Au) Argentate Silver (Ag) Plumbate Lead (Pb) Cuprate Copper (Cu) Ferrate Iron (Fe) Name in an Anionic Complex Metal
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Coordination Compounds y Name the following complex ions: { Ni(CN) 4 2- { Co(SCN) 2 (H 2 O) 4 +
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Coordination Compounds y Name the following coordination compounds: { Na 3 [Co(CN) 6 ] { Cs[CrBrCl(NH 3 ) 4 ]
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