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- 1) Of the following list, what solvents would you use in NMR? Why? a) b) Water c) Benzene-d6 d) CDC13 e) CF3COOH f) Dioxane-ds AcetoneWhich structure is in agraement with both of thasa R and H NMA data? IR, cm (Intensity)-2965 (strong), 1745 (strong), 1238 (strong) H NMR, ppm (splitting, H): 0.94 (doublet, 6H), 193 (multiplet, 1H), 2.05 (singlet, 3H), 3.8as (doublet, 2H) A. tor B. D. C.a. How many signals are in its 13C NMR spectrum?b. Which signal is at the lowest frequency? CH3CH2CH2Br
- How many NMR signals? -methyl propanoate -C2H5NUsing a 300 MHz NMR instrument: a. How many Hz downfield from TMS is a signal at 2.5 ppm? b. If a signal comes at 1200 Hz downfield from TMS, at what ppm does it occur? c. If two peaks are separated by 2 ppm, how many Hz does this correspond to?Draw the structure for a compound with the formula C8H10O3 that exihibits the 1H-NMR spectrum provided integral parts are also provided in a table above the 1H-NMR picture.
- 6. Predict the numbers of signals, integration ratios, and splitting pattems of the following compounds in the 'H-NMR and "C-NMR spectra. (12 pts) Compounds 'H-NMR BC-NMR CH, CHOCH,CCH, CH, Br b) c)How does the operating frequency in NMR spectroscopy compare with the operating frequency in IR and UV/Vis spectroscopy?Using a 300 MHz NMR instrument:a. How many Hz downfield from TMS is a signal at 2.5 ppm?b. If a signal comes at 1200 Hz downeld from TMS, at what ppm does it occur?c. If two signals are separated by 2 ppm, how many Hz does this correspond to?
