Question

MUTUI IC U P! 1 point 5. Calculate and describe the vibrational modes of H.O and list which modes are IR active. Give the expected wavenumber of 2 of the stretches. 18 points 6. What are the major advantages of an ITIN

as specific as possible please. thank you thank you.

Answer 1

Rz CLE I 123922, ny Re Ry RR, Ry az,97 C262) i on 1 1 1 1 – 1 I 1 1 1 - 1 ch 2 Point group By (3N-6) - 12-6 Faed: | 12 o o 41 Decomparitioni no=1 12 to to +4 = 4 PBg = + 11270+0.47 = 2 NAU=&[12+0+0-4] =2 But [12toto + 4 = 4

.: Tred = 4Ag + 2 Bg + 2A u + 4 Bu translation - Aut Bu (m,y,z depended) Tadt= Ag +2Bg (Roe, Ry, Radepandent) Г. д-р А+ . (кі, Г.-Те-Г.) Au + 2 Bu I wib = 3 4g + 6 vibrations 3 leden Au, a Bu IR actine: 3 Raman active modes Roman 3 Ag, hire

the Decompostion. It is a method to find out Munker of irreducible representation in a greducible representations. n=1 XCm(R) OCK(R) ) where n = no of ixro ducible representation h = order of group 9 no. of operations in a class rottet

Characters of different operation : ✓ E (89) XS :> c(2): 699) X+ 0(e). (899) X=1 06) 39X1 a 10 00 o-o 2 :1 -00 At70 is coline are 4 wwth y S4 7 6 69!) : X=-= ($4 can * x = 0 . why C3 1-1/ 2B20 -W/2 -1/0

Out of 6 stretching out of 6 viborational modes, expected manenumber for two stretching frequencies are ~ 3600 en (ont sym stretching) or 3500 cut (on asym stretching