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CH2ch202 - I Chapter 20 Lecture 2 Transition Metals...

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I. Nomenclature of Coordination Complexes A. Ligands 1) Table 20.14 lists common ligands, names, structures, and abbreviations Chapter 20 Lecture 2 Transition Metals
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A. Naming and Writing Formulas of Coordination Compounds 1) The cation comes first, then the anion(s) a) diamminesilver(I) chloride [Ag(NH 3 ) 2 ]Cl b) potassium hexacyanoferrate(III) K 3 [Fe(CN) 6 ] 1) Inner Sphere Complex Ion is enclosed in brackets a) Ligands are named before the metal b) Metal is written first in the formula c) Metal oxidation state in Roman Numerals in parenthesis after the metal ion d) A space only between cation and anion e) No capitalization is needed i. tetraamminecopper(II) sulfate [Cu(NH 3 ) 4 ]SO 4 ii. hexaamminecobalt(III) chloride [Co(NH 3 ) 6 ]Cl 3 1) Prefixes denote the number of each ligand type. Special prefixes and parentheses are used if the ligand already contains a prefix. 2 di bis 6 hexa hexakis 1 tri tris 7 hepta heptakis 2 tetra tetrakis 8 octa octakis 3 penta pentakis 9 nona nonakis 10 deca decakis
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a) dichlorobis(ethylenediamine)cobalt(III) fluoride [Co(en) 2 Cl 2 ]F b) tris(bipyridine)iron(II) chloride [Fe(bipy) 3 ]Cl 2 1) Ligands are named in alphabetical order not counting prefixes. a) tetraamminedichlorocobalt(III) [Co(NH 3 ) 4 Cl 2 ] + b) amminebromochloromethylamineplatinum(II) [Pt(NH 3 )BrCl(CH 3 NH 2 )] 1) Ligand name alterations: a) Anionic ligands are given an -o suffix: chloro, flouro, oxo, sulfato b) Neutral ligands keep their name: methylamine, bipyridine c) Water becomes aqua d) NH 3 becomes amm ine to keep separate from alkylamines 1) How to handle anionic complexes a) Add –ate to the metal name if the complex ion has an overall (-) charge b) Negatively charged complexes of certain metals use their Latin names: Fe = ferrate Ag = argenate Sb = stibate Pb = plumbate Sn = stannate Au = aurate c) [PtCl 4 ] 2- = tetrachloroplatinate(II)
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II. Coordination Chemistry Isomers = same ligands arranged differently A. Hierarchy of isomers
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A.
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