“Loyola College B.Sc. Chemistry April 2012 Coordination Chemistry Question Paper PDF Download”

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

SIXTH SEMESTER – APRIL 2012

CH 6607/CH 6601 – COORDINATION CHEMISTRY

 

 

 

Date : 18-04-2012              Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

 

PART – A

 

Answer ALL the questions:                                                                                       (10 x 2 =20 marks)

 

  1. Calculate CFSE for [Co(NH3)6]2+ .
  2. Write the oxidation number and coordination number of iron in K3[Fe(CN)6].
  3. Define outer sphere mechanism with an example.
  4. Draw the structure of Fe(CO)5.
  5. What is nephelauxetic effect?
  6. Mention the applications of radiopharmaceuticals.
  7. Define metal template synthesis with a suitable example.
  8. Give the biological role of peroxidase.
  9. What is chelate therapy?
  10. Give an example for non-complementary electron transfer reaction.

PART – B

 

Answer any EIGHT questions:                                                                                     (8 x 5 = 40 marks)

 

  1. Write a note on photoredox reactions.
  2. What is Trans effect? Mention its applications.
  3. Among the complex ions [Fe(H2O)6 ]2+and [Fe(H2O)6]3+  which is expected to give greater splitting of d orbitals.
  4. Discuss the structure and function of carboxypeptidase
  5. How does Zeigler Natta Catalyst catalyze the polymerization of ethylene?
  6. State and explain Jahn Teller theorem with a suitable example. What are its consequences?
  7. What are the experimental evidences for metal – ligand overlapping?
  8. [Co(CN)6]3– is diamagnetic but [Co(F)6]3– is paramagnetic. Account for difference in magnetic properties of these two octahedral complexes using CFT.

 

  1. Explain metal template synthesis of Schiff bases with suitable examples.
  2. Discuss the mechanism of inner sphere electron transfer reaction with suitable examples.
  3. Describe the structure and bonding in Metal alkyls      ii. carbenes.
  4. Explain the following apoenzymes   ii. coenzymes.

 

PART – C

 

Answer any FOUR questions:                                                                                       (4 x 10=40 marks)

 

  1. What are π–acceptor ligands? Discuss in detail the nature of bonding involved in

Fe3(CO)12   and Cr(CO)6.

  1. Discuss the σ and π metal –ligand bonding in transition metal complexes with reference

to octahedral geometry.

  1. a) Explain invivo and invitro nitrogen fixation.
  2. b) Give the importance of contrast agents in MRI.
  3. a)Explain the 18 electron rule with two examples.
  4. b) Discuss the structure and bonding of ferrocene.
  5. What do you understand by nucleophilic substitution mechanism reactions for

octahedral complexes? Discuss associative and dissociative mechanism of ligand

substitution for octahedral complexes.

  1. a) Giving a neat diagram explain Crystal Field splitting of d orbitals when a transition

metal ion is placed in a tetrahedral field.

  1. b) Discuss the mechanism of hydrogenation of olefins using Wilkinson’s catalyst.

 

 

 

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