Saurastra University 2006 M.Sc Computer Science Inorganic Chemistry : - VIII (Group Theory & Symmetry) - Question Paper

M. Sc. (Part - II) exam
April / May – 2006
Inorganic Chemistry : Paper - VIII
(Group Theory & Symmetry)
Time : three Hours] [Total Marks : 100
Instructions : (1) Attempt any 5 ques..
(2) ques. No. one is compulsory.
(3) Attempt any 4 from ques. No. two to 7.
(4) All ques. carry equal marks.
1 ans any 4 : 20
(a) Show that all symmetry elements are current in Td
symmetry.
(b) obtain out point groups of subsequent Molecules :
C2H4Br2, C6H6, NH2Cl, PCl5, XeO4, CH3COCH3.
(c) provide the examples of point group :
C2V, C4 D2h,C5 oh.
(d) discuss likeness transformation and its uses.
(e) State and discuss Mullikan's notation for irreducible
representation in character table.
(f) Write a note on Black Factored matrices.
(g) Draw orgel diagrams of d–orbitals related with D and
F terms.
2 explain the great orthogonality theorem in detail. 20
3 (a) discuss the method to determine point group of a 10
molecule.
(b) Prove that d–orbitals split into A1g B1g B2g Eg + + + . 10
ST-2775] two [ 100 ]
4 By the help of projection operator determine Salac's 20
for AB3 molecule and mathematical form of wave function.
5 (a) Write a note on direct product of metrices. 10
(b) Determine IR and Raman bands by group theory 10
for BF3 molecule.
6 Fe(CO)5 indicates 2 stretching frequencies in the region 20
2000 cm–1 in I.R. spectra show that the structure is consistent
with trigonal bipyramidal.
7 (a) Derive selection rules for Raman spectra. 10
(b) Write a note on 'Tannabe–Suggano' diagrams. 10

Earning:   Approval pending.