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Rupesh CHEM 105b Dr. Parr Week 14 04/06-04/10 www.usc.edu/si [email protected] Naming Complex Ions 1. Fill out the following table Formula Name Correction Potassium tetrachlorocobalt(II) Sodium dicyanodioxolatoironate(III) Tetraaminechloronitrocobalt(III) Dichloroethylenediamineplatinum(II) ion Isomerism 2. How many isomers does square planar [Pd(NH3)2(SCN)2] have? Draw each isomer and identify what kind of isomerism each displays. (Extra Practice: try it with tetrahedral geometry) a. 2 b. 3 c. 4 d. 6 1 Rupesh Week 14 CHEM 105b Dr. Parr 04/06-04/10 3. Does either cis- or trans- [Co(C2O4)2(H2O)2]- have optical isomers? Draw them www.usc.edu/si [email protected] Crystal Field Theory 3. Draw the crystal-field energy-level diagrams and show the placement of d electrons for each of the following [Cr(H2O)6]2+ (4 unpaired electrons) [IrCl6]2(high spin) [Mn(H2O)6]2+ (high spin) [Cr(en)3]3+ [Ru(NH3)5H2O]2+ [NiF6]4- (low spin) MCAT Question of the Week 4. Which of the following pairs of compounds are not coordination isomers? i. [TiBr2(H2O)(NH3)]NO3 ii. [TiBr(H2O)(NH3)(NO3)]Br iii. [TiBr(NH3)(H2O)(NO3)]Br a. i and ii b. ii and iii c. i and iii d. i, ii and iii Week 14 Tip: I hope you all did well on your Bio exam; however, EXAM 4 is NEXT WEEK! I know that came up on us fast but don’t worry we are almost done. I know you are probably pooped from bio, but I encourage you all to start early. The best way to succeed on this exam is practice… PrAcTiCe! PRACTICE!@! 2 Rupesh CHEM 105b Dr. Parr Week 14 04/06-04/10 www.usc.edu/si [email protected] Naming Coordination Compounds 1. The cation is named before the anion 2. Ligands are named before metal ions 3. For ligand “o” is added to the root name of an anion. For neutral ligands the name of the molecules is used with exceptions 4. The prefix: di, tri, etc., are used to denote the number of simple ligands. The prefixes bis, tris, tetrakis are used for more complicated ligands that already contain di, tri, etc. 5. The oxidation state of the central metal ion is designated by roman numerals 6. Ligands are named alphabetically (ignore the prefix) 7. Of the complex ion has a negative charge, the suffix “-ate” is added to the name of the metal. Sometimes Latin names are used to identify the metal. Element Name Iron Copper Lead Silver Gold Tin Latin Names Element Latin Symbol Name Fe Ferrate Cu Cuprate Pb Plumbate Ag Argentate Au Aurate Sn Stannate Neutral Molecules Aqua H2O Ammine NH3 Methylamine CH3NH2 Carbonyl CO Nitrosyl NO Anions Flouro Chloro Bromo Iodo Hydroxo Cyano FClBrIOHCN- Approximate Relationship of Wavelength of Visible Light Absorbed to Color Observed Absorbed Wavelength (nm) Observed Color 400 (violet) Greenish Yellow 450 (blue) Yellow 490 (blue-green) Red 570 (yellow-green) Violet 580 (yellow) Dark Blue 600 (orange) Blue 650 (red) Green 3 Rupesh CHEM 105b Dr. Parr www.usc.edu/si [email protected] Week 14 04/06-04/10 4 Rupesh CHEM 105b Dr. Parr Week 14 04/06-04/10 5 www.usc.edu/si [email protected]
