Loyola College M.Sc. Chemistry April 2007 Advanced Coordination Chemistry Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

LM 56

M.Sc. DEGREE EXAMINATION – CHEMISTRY

FOURTH SEMESTER – APRIL 2007

CH 4956 – ADVANCED COORDINATION CHEMISTRY

 

 

 

Date & Time: 23/04/2007 / 9:00 – 12:00   Dept. No.                                           Max. : 100 Marks

 

 

Part-A

Answer all questions. Each question carries two marks 

 

  1. Explain the EPR spectrum of [Mo(CN)8]3-.
  2. Mention the features of the Mossbauer spectrum of K4[Fe(CN)6].
  3. Explain the 19FNMR spectrum of TiF4(base)2.
  4. Mention the number of peaks and their ratio in N(1s) PES of [Rh(NH3)5(NO2)](NO3)2.
  5. Draw the unit structure of rubredoxin.
  6. What is nephelauxetic series? How is it constructed?
  7. According to crystal field formalism pseudooctahedral complexes of d1,4,6,9 metal ions are expected to exhibit one spin-allowed d-d transition, but they often exhibit many transitions in close proximity. Rationalize.
  8. What is dendrimer-encapsulated catalysis? Mention one such reaction.
  9. Differentiate calix[4]arene and calix[6]arenes.
  10. What is supramolecular self assembly? Depict such a supramolecular assembly.

 

Part-B

Answer any eight questions. Each question carries five marks 

 

  1. Discuss the EPR spectrum of [Mn(H2O)6]2+ and explain Kramer’s degeneracy.
  2. Discuss the temperature variation 1H NMR spectral features of Ni(CH2=CH-CH2)2.
  3. Discuss the g and A terms in EPR spectroscopy and bring out their significance.
  4. How are the following ligands prepared? (a) salen and (b) dibenzo-18-crown-6.
  5. Calculate the mJ value of Ce(III).
  6. Write a note on copper blue protein.
  7. How do you differentiate low-spin and high-spin octahedral complex of a d5 metal ion by electronic spectroscopy?
  8. Explain the feature of Tanabe Sugano diagrams. Compare it with Orgel diagrams.
  9. What are pseudorotoxanes? Explain the synthesis of two such systems.
  10. Explain supramolecular assembly with an example. Comment upon the role of bridging ligands in the construction of supramolecular assemblies.
  11. What are metallodendrimers? Mention the different kinds of metallodendrimers.
  12. Mention the different kinds of supramolecular interactions. Cite two supramolecular assemblies constructed by any two such interactions.

 

 

Part-C

Answer four questions. Each question carries ten marks 

 

  1. Discuss the significances of isomer sciff (d) and quadrapole splitting (DEQ) in Mossbauer spectrum. How is p-back bonding inferred from the d value?
  2. Discuss the biological role and structure of ferredoxin along with model complexes.
  3. Discuss the temperature variation magnetic susceptibility studies to understand the spin-cross over systems.
  4. (a) Explain the method of synthesising of PAMAM dendrimer.

(b) Write a note on molecular wires.

  1. (a) Explain the electronic spectral feature of tetragonally distorted octahedral complex of low spin d6 metal ion. How do you compute the ligand field parameters.

(b) Compare the above spectrum with that of a pseudooctahedral complex of high spin d6 metal ion.

  1. Explain the methods of synthesizing and self assembling catenanes and rotaxanes.

 

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