Tutorial Chapter 2 CHM 361 PDF

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Tutorial Chapter 2 CHM361 - INTRODUCTION TO MOLECULAR ORBITAL THEORY (2021/2022)...

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CHM 260: CHAPTER 2.2 (IR Spectroscopy)

1. 2. 3. 4. 5. 6.

State the characteristic of an IR active molecule Name any one (1) continuum sources used in infrared (IR) spectroscopy. Explain the importance of the fingerprint region in the IR spectroscopy. Name any two (2) solvents which are commonly used in infrared (IR) spectroscopy. Describe the preparation of solid sample by Nujol Mull method Describe the preparation procedures for the analysis of pure citronellal oil using the IR instrument. 7. Describe the KBr pelleting method for the analysis of acetylsalicylic acid by Fourier Transform Infrared (FTIR) instruments. 8. Arrange the given bonds in the order of increasing frequency C=O, C-O, O-H, C=C 9. Arrange the following bonds in the order of increasing polarities. O-H, C-H, N-H 10. Propose two (2) important bonds and the corresponding wavenumbers in the IR spectrum of 1-hexanol. 11. Predict which possible compound (Compound G or H) corresponds to Spectrum 1. O

Br

Compound G

Compound H

12. Predict the bond which is responsible for the strong absorption at 3100-3000 cm-1 in the IR spectrum of toluene. Given: Toluene CH3

13. Based on the following IR data, relate about the structure of the given compound. Molecular formula : C5H12O IR spectrum : A broad and strong absorption peak at 3600-3200 cm-1, no absorption peak at 1760-1670 cm-1. 14. Distinguish between the types of compound analysis using UV-Vis and IR spectroscopy....