recognize the bands of this IR spectrum and the compound 8 BRUKER 郵解 6000 5000 4000 3000 2000 1000 Wavenumber cm-1 :議 06 se 0e 75 04 09 Transmittance [%]
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- Based on the IR Spectra, need help filling out the following table. Thank you :) Wavenumber (cm-1) Band intensity Assignment e.g. 3286 e.g. Medium, broad e.g. N-H stretchingSpectroscopic Analysis https://www.youtube.com/watch?v=ZfMPyZiDsf4&list=PLE-217H0ao60Uzpzj-FNP_0ScVp5SZB7j&index=2 watch the following question and read the article to answer the questions Spectroscopic Analysis-1 a.Which of the following statements regarding IR spectroscopy is wrong? Infrared radiation is higher in energy than UV radiation. Infrared spectra record the transmission of IR radiation. Molecular vibrations are due to periodic motions of atoms in molecules, and include bond stretching, torsional changes, and bond angle changes. Infrared spectra give information about bonding features and functional groups in molecules. b.Which is the correct order of decreasing wave number of the stretching vibrations of (1) C-H (alkane), (2) C-H (alkene), (3) C-H (alkyne), and (4) C=O? (1) > (2) >(3) >(4) (4) < (3) < (2) < (1) (3) < (4) ≈ (2) < (1) (1) < (4)…Determine the IR-active CO stretch vibration modes for the following molecules. Show procedures and calculations. a) fac-Fe(CO)3Cl3 b) Fe(CO)5 (triagonal bipyramid)
- Explain how you will use Raman spectroscopy to process adulterated palm oil containing Sudan IVThe protein haemerythrin (Her) is responsible for binding and carrying O2 in some invertebrates. Each protein molecule has two Fe2+ ions that are in very close proximity and work together to bind one molecule of O2, form ing an Fe2O2 group. (a) The Raman spectrum of oxygenated haemerythrinobtained with laser excitation at 500 nm has a band at 844 cm-1 which has been attributed to the O-O stretching mode of bound 16O2. Why is Raman spectroscopy and not infrared spectroscopy the method of choice for the study of the binding of O2 to haemerythrin? (b) Proof that the 844 cm-1band in the Raman spectrum of oxygenated haemerythrin arises from a bound O2 species may be obtained by conducting experiments on samples of haemerythrin that have been mixed with 18O2, instead of 16O2 . Predict the fundamental vibrational wavenumber of the 18O-18O stretching mode in a sample of haemerythrin that has been treated with 18O2. (c) The fundamental vibrational wavenumbers for the O-O stretching modes of O2,…Give a detailed explanation of how Raman spectroscopy protocol will be used to process a sample of palm oil adulterated with Sudan IV
- Annotate the HNMR peak for 1.085, 4.046, 6.155, 68.57, 8.763Vibrational wavenumbers for K[N3] are 2041, 1344 and 645 cm-1. Draw the structure of the [N3]- ion and sketch the 3 vibrational modes. Which are IR active?Explain the basic principle of Raman spectroscopy. 2. What type of scattering and can be observed and explain the differences. 3. What does it mean by Raleigh scattering and draw the energy difference. 4. What does it mean by inelastic scattering? 5. Why does Stokes scattering has higher intensity compared to anti-stokes?
- Calculate wavenumber of light with a wavelength of 3030 nm1. What is Polarizability? 2. Draw a basic Raman instrument set up. 3. Why laser sources are used in Raman spectroscopy? 4. Suggest different types of laser sources. 5. What are the types of Raman spectroscopy available in market?Peocedures involved when using Surface enhanced Raman spectroscopy(SERS) to determine the quantitative nature of Sudan-iv dye in adulterated palm oil.