Loyola College Coordination Chemistry Question Papers Download

“Loyola College B.Sc. Chemistry April 2008 Coordination Chemistry Question Paper PDF Download”

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

GH 21

 

SIXTH SEMESTER – APRIL 2008

CH 6601 – COORDINATION CHEMISTRY

 

 

 

Date : 21/04/2008                Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

                                                                           PART – A                                                           

Answer all the questions:                                                                  10 x 2 = 20

 

  1. Calculate CFSE value for high spin Mn2+ octahedral complex.
  2. What is meant by spin – orbit coupling?
  3. ‘The electron transfer from [Co(NH3)6]2+ to [Co(NH3)6] 3+ is extremely slow’. Explain
  4. Give two examples for photoredox reactions.
  5. How is ferrocene prepared? Draw its structure.
  6. Explain cis effect with an example.
  7. Write two examples for Metal template synthesis.
  8. Draw the structure of (a) Fe3(CO)12 (b) Co4(CO)12
  9. What is the biological significance of peroxidases?
  10. What are the contrast agents used in MRI?

PART – B

Answer any Eight questions:                                                   8 x 5 = 40

 

  1. Describe the CF splitting of metal d – orbitals in tetrahedral field of ligands.
  2. State John-Teller theorem. Explain why Cu2+ does not form regular octahedral complex while Ni2+
  3. What are the experimental evidences for overlapping between metal and ligand orbitals? Explain with examples.
  4. Discuss the splitting of metal d-orbitals in square planar complex.
  5. Explain dissociative mechanism of ligand substitution reactions in octahedral complex with suitable example.
  6. What are photoisomerisation reactions? Explain with two examples.
  7. How are cis-and trans – isomers of [Pt(NH3)2Cl2] prepared?
  8. Write the name and draw the structure for the following
    • [Pt(C6H5-C º C-C6 H5) (PPh3) 2]
    • Be(C5H5) 2
  9. What is Wilkinson’s catalyst? Describe the hydrogenation an alkene using it.
  10. Discuss the bonding in (a) metal carbenes (b) Metal alkyls.
  11. Write a note on iron-molybdenum center in nitrogenase enzyme.
  12. Explain chelate therapy with examples.

 

 

PART – C

Answer any FOUR Questions:                                                         4 x 10 = 40

 

  1. What are the principles of MO theory as applied to complexes? Construct MO energy level diagram for  [Co(NH3)6]3+ and explain why it is a diamagnetic complex.
  2. Define inner-sphere electrom transfer reaction. Explain the mechanism involved with a suitable example.  What are the experimental evidences for inter sphere electron transfer reactions?
  3. (a) Describe the factors affecting crystal field stabilization Energy in complexes.

(b) What are complimentary and non-complimentary electron transfer reactions?  Give two examples.

  1. (a) Write a note on cis-and trans-effect in synthesis of octahedral complex.

(b) Describe template synthesis of metal phthalocyanins.

  1. Describe in detail about bonding in metal carbonyls.
  2. (a) Write a note on Zeigler-Natta catalyst and its synthetic application.

(b) Discuss the structure and functions of carboxypeptidase – A.

 

 

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“Loyola College B.Sc. Chemistry April 2009 Coordination Chemistry Question Paper PDF Download”

by

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

WD 20

B.Sc. DEGREE EXAMINATION – CHEMISTRY

SIXTH SEMESTER – April 2009

CH 6607/CH 6601 – COORDINATION CHEMISTRY

 

 

 

Date & Time: 21/04/2009 / 9:00 – 12:00      Dept. No.                                                          Max. : 100 Marks

 

 

PART – A

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

 

  1. Calculate CFSE value for octahedral complex.
  2. Predict whether an octahedral complex formed by a ion is perfect or distorted. Explain.
  3. on treatment with gives trans . Account for.
  4. Give two examples for photo substitution reaction.
  5. What is the principle involved in Metal template Synthesis? Give an example.
  6. What are non-complementary electron transfer reactions? Give an example.
  7. Explain the role of rhodium metal in Wilkinson’s catalysis.
  8. Draw the structure of .
  9. What is meant by chelate therapy? Mention its advantage.
  10. What is the biological role of catalases in nitrogen fixations?

 

PART – B

 

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

 

  1. Describe with a neat diagram, the splitting of metal d-oribals in a square planar complex.
  2. What are the experimental evidences for metal-ligand orbitals overlapping?
  3. State Jahn Teller theorem. The octahedral complex formed by is distorted. Explain.
  4. Discuss the mechanism of inner-sphere electron transfer reaction with a suitable example.
  5. Explain associative mechanism of ligand substitution reactions in octahedral complexes.
  6. Write a note on photoisomerisation reactions.
  7. Describe the polarization theory of trans effect in synthesis of square planar complexes.
  8. How do you prepare Schiff bases using template synthesis? Explain with two examples.
  9. The IR spectrum of consists of two CO stretching bands at 1857 cm-1 and 1897 cm-1. Rationalize this.
  10. Explain the polymerization of olefins using Ziegler-Natta catalyst.
  11. What is the significance of contrast agents in MRI? Give three examples.
  12. Write a note on iron-molybdenum center in nitrogenase enzyme.

 

 

PART – C

Answer any FOUR questions:                                                                                             (4 x10 = 40)

 

  1. (a) Construct Metal orbitals and LGO suitable for and – bonding in Octahedral geometry  (5)

(b) Construct MO energy level diagram for .                                                            (5)

 

  1. Define outer-sphere electon transfer reaction. Explain the mechanism with an example. What are the experimental evidences for outer sphere electron transfer?

 

  1. (a) Explain dissociative mechanism of ligand substitution reactions in octahedral complexes.  (5)

(b) Describe the CF split of metal d-orbitals in octahedral geometry.                                              (5)

 

  1. (a) Predict the stability of .                    (5)

(b) Draw the structure of (i) Fe3 (CO)12   (ii)Mn2(CO)10.                                                                 (5)

 

  1. (a) What is meant by Cis effect? Explain with two examples.          (5)

(b) Describe the template synthesis of metal phthalocyanins.                                                         (5)

 

  1. (a) Write a note on Wilkinson’s catalyst and hydrogenation of alkene using it.          (6)

(b) Write the structure of carboxypeptidase-A. What is its biological importance?                      (4)

 

 

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“Loyola College B.Sc. Chemistry April 2011 Coordination Chemistry Question Paper PDF Download”

by

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

SIXTH SEMESTER – APRIL 2011

CH 6607/CH 6601 – COORDINATION CHEMISTRY

 

 

 

Date : 07-04-2011              Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

PART –A

Answer ALL the questions                                                                           (10 x 2=20)

  1. What is the role of catalase in nitrogen fixation?
  2. Calculate CFSE value for Mn2+.
  3. What are noncomplementary electron transfer reactions?
  4. Explain outer sphere mechanism with an example.
  5. What is Trans effect? Give an example.
  6. Give an example of metal phthalocyanin involving metal template synthesis.
  7. State Jahn Teller Theorem.
  8. Draw the structure of Ni(CO)4
  9. Mention the advantages of chelate therapy.
  10. What are coenzymes? Give an example.

PART –B

Answer any EIGHT questions                                                                         (8 x 5 =40)

  1. Describe with a neat diagram crystal field splitting of metal d-orbitals in tetrahedral field.
  2. Explain the polymerization of olefins using Ziegler Natta catalyst.
  3.    Explain photo substitution reactions with a suitable example.
  4. Discuss the mechanism of inner sphere electron transfer reaction with a suitable example.
  5. What is the significance of contrast agents in MRI? Give two examples.
  6. Discuss the theories of Trans effect.
  7. Explain metal template synthesis of Schiff bases with suitable examples.
  8. Describe bonding in Fe3(CO)12
  9. Explain the mechanism of alkene hydrogenation.
  10. Write a note on photoisomerisation reactions.
  11. Discuss the biological role of carboxypeptidase and catalases.
  12. What are the experimental evidences for metal-ligand overlapping?

PART –C

      Answer any FOUR questions                                                              (4 x 10 = 40)

  1. a. Construct MO energy level diagram for [Co (NH3)6]2+
  2. Explain crystal field splitting of metal d-orbitals in octahedral complexes.
  3. a. Discuss the structure and bonding of ferrocene.
  4. Explain dissociative mechanism of ligand substitution reaction in octahedral

complexes.

  1. a. Explain cis effect with two examples.
  2. Describe the metal template synthesis of Schiff bases
  3. a. Write briefly on in vivo and in vitro nitrogen fixation.
  4. Draw the structure of a. Fe(CO)5   b. Mn2(CO)10.
  5. a. Explain 18 –electron rule with any two examples
  6. Construct Metal orbitals and LGO’s suitable for σ and П bonding in octahedral

geometry.

  1. a. Write a note on the following
  2. hydrogenation reaction c. hydroformylation reaction.
  3. photoredox reactions d.  Photoisiomerizations reactions.

 

 

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

by

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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