1. Lecture 304/15/05

2. Quiz 4/15/04 1) Electrolysis of a solution of CuSO 4 to give copper metal is carried out using a current of 0.75 A. How long should electrolysis be carried out to produce 1.0 g of copper? 2) What is the main difference between a fuel cell and a battery? Farradays constant = 96,500 C/mole e -

3. bonds NH 3 Ammine1 COCarbonyl1 H2OH2OAqua1 Br - Bromo1 Cl - Chloro1 CN - Cyano1 F-F- Fluoro1 NO 2 - Nitro1 OH - Hydroxo1 NCS - Isothicyanto1 SCN - Thiocyanato1 CO 3 2- Carbanato2 C 2 O 4 2- Oxalato2 H 2 NCH 2 CH 2 NH 2 (en)Ethylenediamine2 EDTA 4- Ethylenediaminetetraacetic acid6

4. Naming complex compounds 1. Name of cation is given before the name of the anion 2. With a complex ion, ligands named before the metal 1. If more than one ligand, name alphabetically 3. Anionic ligands end in “o”, neutral ones bear the name of the molecule 4. Greek prefixes (di-, tri-, tetra-, penta-) used for number of ligands 5. If complex ion is an anion, name ends in “ate” 6. Oxidation # of metal is given in paranthesis in roman numerals Co(NH 3 ) 3 (OH) 3 Triamminetrihydroxocobalt (III) K[Cr(NH 3 ) 2 (C 2 O 4 ) 2 Potassium diamminedioxalatochromate (III) diamminetriaquahydroxochromium (III) nitrate [Cr(NH 3 ) 2 (H 2 O) 3 (OH)](NO 3 ) 2 Potassium tetrachloroplatinate (II)K 2 [PtCl 4 ]

5. Two ethylenediamine ligands and 2 chloride ions form a complex ion with Co 3+ Write the formula of the complex ion. [Co(en) 2 Cl 2 ] + What is the coordination number of cobalt? 6 Rewrite the formula with the appropriate chloride counter ions. [Co(en) 2 Cl 2 ]Cl

6. Coordination # 2 4 6 Geometry

7. Isomers: Structural Same molecular formula, different bonding arrangement 1.Coordination isomerism: Ligand and counter-ion exchange [Co(NH 3 ) 5 Br]SO 4 ↔ [Co(NH 3 ) 5 SO 4 ]Br violetred Can also tell the difference between the 2 by precipitating out Br - by adding Ag + 2.Linkage isomerism: ligand attached to metal through different atom 1.SCN - SCN - thiocyanato SCN - isocyanato 2.NO 2 - NO 2 - nitro ONO - nitrito