++++Chem 162-2009 Chapter 22-Coordination compounds practice problems

++++Chem 162-2009 Chapter 22-Coordination compounds practice problems

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CHAPTERS 22 CHEM 162-2007 PRACTICE PROBLEMS CHAPTER 22 - TRANSITION METALS AND COORDINATION CHEMISTRY COORDINATION COMPOUNDS E. Tavss, PhD 1
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CHAPTER 21 - TRANSITION METALS AND COORDINATION CHEMISTRY 49 Chem 162-2008 Final Exam + Answers Chapter 22 – Transition Metals and Coordination Chemistry Coordination compounds The formula for potassium dibromodicarbonylrhodate(I) is __________. A. K 2 [Rh(CO) 2 Br 2 ] B. K[Rh(CO)Br 2 ] C . K[Rh(CO) 2 Br 2 ] D. K 3 [Rh(CO) 2 Br 2 ] E. K 3 [Rh(CO) 2 Br 2 ] 2 C 48 Chem 162-2008 Final Exam + Answers Chapter 22 – Transition Metals and Coordination Chemistry Coordination compounds What is the coordination number around the metal in Diaquabis(ethylenediamine)copper(II)? [Ethylenediamine = H 2 NCH 2 CH 2 NH 2 ] A. 2 B. 4 C. 5 D . 6 E. 8 2 H 2 O bonds 4 ethylenediamine bonds 6 = total D 2
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2 Chem 162-2008 Final Exam + Answers Chapter 22 – Transition Metals and Coordination Chemistry Coordination compounds Structural isomerism can occur __________. A . with ligands that have more than one possible donor atom. B. in cis-isomers of octahedral complexes. C. with optical isomers. D. only with a coordination number 6. E. only in tetrahedral complexes C. with cobalt complexes D. with coordination number 6 E. with tetrahedral complexes A. True. Ligands that have more than one possible donor atom, such as ONO - , can form structural isomers (MONO and MNO 2 ). B. False. Cis-isomers are geometrical isomers, not structural isomers. C. False. If one tetrahedral molecule, for example, has an NO 2 linkage, for example, and another molecule has an O 2 N linkage, then the two molecules can’t be enantiomers. A possible exception might be an optically active Co tetrahedral complex, in which each of the two enantiomers have CoONO bonding and CoNO 2 bonding, but I’m not certain these would be called structural isomers. D. False. A Co tetrahedral complex can have CoONO bonding and CoNO 2 . E. False. A Co octahedral complex can be Co(ONO) 3 (NO 2 ) 3 . A 3
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CHEM 162-2008 EXAM III + ANSWERS CHAPTER 22 TRANSITION METALS AND COORDINATION CHEMISTRY COORDINATION COMPOUNDS How many geometrical isomers are possible for the complex ion [Co(en) 2 Cl 2 ] + ? (en = ethylenediamine = H 2 NCH 2 CH 2 NH 2 ) A . 2 B. 3 C. 4 D. 5 E. 1 Co Co Co Enantiomer Enantiomer Not optically active Cis-isomer Cis-isomer Trans-isomer This question was worded very poorly. Better wording would have been, “How many types of geometrical isomers are possible for the complex ion [Co(en) 2 Cl 2 ] + ?” Since there are only two types of geometrical isomers, cis and trans, and this molecule has both cis and trans isomers, then “2” is the correct answer. On the other hand, if “geometric isomers” is interpreted to mean “cis-trans” isomers, as is often the case, then there are two cis and one trans isomer, for a total of three cis-trans isomers. A
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This note was uploaded on 03/30/2011 for the course CHEM 162 taught by Professor Siegal during the Spring '08 term at Rutgers.

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++++Chem 162-2009 Chapter 22-Coordination compounds practice problems

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