Part V. Choose which isomer would give the 1H-NMR spectrum below. Justify your reasoning by assigning important signals to theCorresponding protons of the correct molecule.ADon of of ofHH882907.87.67.48056 [ppm]7.26.86.66.4ō [ppm]

In reading a 1H NMR spectra, you have to consider the peak splitting, the chemical shift, and the…

Answered: Part V. Choose which isomer would give…

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

ChapterL3: Carbon (13c) Nmr Spectroscopy

Section: Chapter Questions

Problem 8E

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Please assist in identifying the all the major peaks of the NMR and what they corresponds with. Please explain.
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Magnetically equivalent protons give a single signal in 1H-NMR. How many signals will be observed in the 1H-NMR spectrum of the compound in the figure? (TO). 4 (B). 6C). 8 (D). 10 CH3
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7. Determine the structure of the compounds below from their spectroscopy data. Sketch the 'H-NMR spectra of the following a and b compounds. Assign peaks to the structures. a) C3H10 1.2 8 (3H, triplet) 2.6 8 (2H, quartet) 7.1 8 (5H, broad singlet) b) C4H7BrO 2.11 8 (3H, singlet) 3.52 8 (2H, triplet) 4.40 8 (2H, triplet) Cs Scanned with CamScanner
6. For each compound in the group of isomers, indicate the number of signals you would expect to see in the corresponding ¹H-NMR spectrum, indicate the splitting pattern with s (singlet), d (doublet), t (triplet), quarter (q), pentet (p), sextet (sx) or m (multiplet) each signal, and the integration ratios for the signals. x Number of signals: Splitting pattern: Integration ratio: Number of signals: Splitting pattern: Integration ratio: Number of signals: Splitting pattern: Integration ratio: Can all these isomers be distinguished from one another by these three pieces of information? Explain.
5. L-dopa is used in the treatment of Parkinson's disease. Identify the four most acidic protons and arrange them in order of increasing acidity. :O: g HO: :OH 6. Coumarins are a class of natural products produced by plants and animals. It has a wide variety of applications in cosmetics, food industry and fluorescent laser dyes. In the ¹HNMR spectrum of coumarin derivate shown below, the two signals farthest downfield are at 7.38 and 8.42 pm. Identify the two protons that most likely give rise to these signals and justify your answer using resonance structures. :O:
What is the structure of the compound which gives rise to this data? Explain your reasoning. NMR SPECTRUM C7H80
3. Consider the structure of p-xylene below to answer the following. p-xylene (a) How many peaks (absorptions) should p-xylene have in its ¹H NMR spectrum? (b) What ratio of peak areas would you expect on integration of the spectrum? (c) Use the NMR tables to approximate the chemical shifts of the signals in p-xylene.

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Part V. Choose which isomer would give the 1H-NMR spectrum below. Justify your reasoning by assigning important signals to the Corresponding protons of the correct molecule. A D on of of of H H 88 2 90 7.8 7.6 7.4 80 5 6 [ppm] 7.2 6.8 6.6 6.4 ō [ppm]