LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

LM 16

SIXTH SEMESTER – APRIL 2006

                                                 CH 6601 – COORDINATION CHEMISTRY

(Also equivalent to CHE 601)

 

 

Date & Time : 21-04-2006/FORENOON     Dept. No.                                                       Max. : 100 Marks

 

 

PART – A

Answer All the questions                                                                                10×2=20

1. Draw the structure of salicyldoxime? How is it prepared?
2. Calculate the CFSE value for [Cr(NH₃)₆]³⁺ complex.
3. How is ferrocene prepared? Draw is structure.
4. Show that Ni(CO)₄ obeys EAN rule.
5. Draw the structures of (a) Co₂(CO)₈ (b) Mn₂(CO)₁₀
6. What are metal-arene complexes? Give one example.
7. What is cisplatin? Mention its use.
8. Give the IUPAC name of (a) K[PtCl₃(C₂H₄)] (b) Fe₂(CO)₉
9. How is ‘salen’ ligand prepared?
10. Mention any two uses of crown ethers.

 

PART – B

Answer any Eight only                                                                                   8×5=40

11. Apply ligand field theory to [Fe(CN)₆]^4- and [Fe(H₂O)₆]³⁺
12. How are cis and trans – [Pt(NH₃)₂Cl₂] prepared?
13. Give the evidence for the bridge mechanism in inner sphere electron transfer      mechanism.
14. Describe the splitting of d orbitals in the tetrahedral ligand field.
15. Give any two reactions indicating the metal template synthesis.
16. Explain the Wackers process of converting ethylene to ethanal.
17. Discuss the photosubstitution reactions in metal carbonyls.
18. How is ‘D_o’ influenced by the nature of the central metal atom?
19. Draw the structures of (a) Ni(DMG)₂ (b) [Zn(EDTA)]^-1
20. Write a note on biological significance of alkali and alkaline earth metals.
21. Write a note on iron-molybdenum centre in nitrogenase enzyme

 

 

 

 

PART – C

Answer any Four only                                                                                   4×10=40

22. State Jahn-Teller theorem. Explain the d-orbital splitting due to elongation and compression along the z-axis in the octahedral complexes. Give one evidence for such a distorted structure.
23. Discuss the association and dissociation mechanism of the substitution reactions in octahedral complexes.
24. Discuss the bonding in metal carbonyls. Give any two evidences supporting the bonding scheme.
25. Describe the hydrogenation of alkene using Wilkinson catalyst. State the merits of this method.
26. Discuss the structure and function of carboxypeptidase-A.
27. Write a note on (a) Crown Ethers (b) Color in transition metal compounds

 

 

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