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- When measured on a spectrometer operating at 200 MHz, chloroform (CHCl3) shows a single sharp absorption at 7.3 δ. (a) How many parts per million downfield from TMS does chloroform absorb? (b) How many hertz downfield from TMS would chloroform absorb if the measurement were carried out on a spectrometer operating at 360 MHz? (c) What would be the position of the chloroform absorption in δ units when measured on a 360 MHz spectrometer?How could you use 1H NMR, 13C NMR, and IR spectroscopy to help you distinguish between the following structures?Construct a 1H NMR spectrum for the compound shown below.
- A 13C NMR spectrum is shown for a molecule with the molecular formula of C4H8O2. Draw the structure that best fits this data.3. Determine the structure for C6H₁1Br, based on the proton NMR spectrum shown. Two peaks: each is a 1H, s, that overlap 10 2H, d 1H, m 3H, s N 3H, d 0absorbtions appear in a drop down 1-6
- CgH,NO2 IR |1* Spectrum IR = NMR Spectrum- 3 THSa.) Annotate the 1H - NMR spectrum by labeling each signal (A-Z) and assigning them to the correct hydrogens on the structure of your unknown molecule Annotate the 13C- NMR spectrum by labeling each signal (A-Z) and then assign the A-Z labels to the correct carbons on the structure of your unknown molecule.ASSIGNED QUESTIONS· - 1. Compound A is converted into compo:ind B with LIAIH4. Treatment of comoound A with strong minerat acid at elevated temperatures yields compound f. Re- đuction of çompound f with LIAIHA gives compound p. Spectra for the compounds are shown below. Write structures for compounds . R. £ and R. Compound A LiAIHy B Cg Hn N Ht LiAl Hy, D cg HioO WAVNO CO IR - Spectrum 4=? IR = ? NMR Spectrum 5 TMS uV Spectrum Absorbance X 100