which of the following compunds matches the soectrum given? Circle the correct answer and explain your reasoning for A,...
A variety of spectra for an organic compound with molecular formula C10H16O are presented below. The experimental accurate mass using (+) APCI source is 153.1280 u. The 1H, 13C, COSY, HSQC and HMBC NMR spectra are given in the following slides. Propose a structure for this unknown and answer or address the following questions or requirements: d. If there are still any questionable assignments, propose additional NMR experiments which would solve those questions and briefly explain specifically what correlations you...
A variety of spectra for an organic compound with molecular formula C10H16O are presented below. The experimental accurate mass using (+) APCI source is 153.1280 u. The 1H, 13C, COSY, HSQC and HMBC NMR spectra are given in the following slides. Propose a structure for this unknown and answer or address the following questions or requirements: a. Using the most abundant isotopes of C, H and O, what are the errors in ppm and milli-Daltons for the experimental accurate mass?...
Assign the NMR peaks below DIRECTLY onto the paper, please!!!! The impurities are water at 2.19 ppm and acetone at 1.6 ppm. So just ignore those peaks. The peaks for the aromatic Hydrogens can be grouped up to one (I believe they are the left most peaks at around 7 to 7.5 ppm. Given that please assign the rest of the hydrogens. We were unable to transcribe this imager2 30 25 20 15 10 9.0 8.5 8.0 7.5 7.0 6.5...
18. Draw the structures of Compound 18a. and 18b. (18 pts), clearly indicate your assignments of all proton resonances (8 pts). Calculate the Unsaturation Index of each compound (4 points) (30 points total) 2.0 3.64 Unsat. Index = (2C + 2-H-X +N)/2 = 1.5 1.06 6.86 7.00 d = 2.44 ppm, Compound 18a. C,H, N 1.0 7.02 6.84 quartet, 2H 2.43 2.45 1.08 1.04 a = 7.01 ppm, b = 6.85 ppm, c = 3.64 ppm, 0.5 doublet, 2H doublet,...
18. Draw the structures of Compound 18a. and 18b. (18 pts), clearly indicate your assignments of all proton resonances (8 pts). Calculate the Unsaturation Index of each compound (4 points) (30 points total) 2.0 3.64 Unsat. Index = (2C+2-H-X +N)/2 = 1.5 1.06 6.86 7.00 d = 2.44 ppm, Compound 18a. C10H,,N quartet, 2H 1.0 7.02 6.84 2.43 2.45 c = 3.64 ppm, 1.08 1.04 a = 7.01 ppm, b = 6.85 ppm, doublet, 2H doublet, 2H singlet, 2H 0.5...
Draw the structures of the Compounds 2.0 3.64 Unsat. Index = (2C+2-H-X +N)/2 = 1.5 1.06 6.86 7.00 d = 2.44 ppm, Compound 18a. C, H, N quartet, 2H 1.0 7.02 6.84 2.43 2.45 1.08 1.04 a = 7.01 ppm, c = 3.64 ppm, b = 6.85 ppm, 0.5 doublet, 2H doublet, 2H singlet, 2H e = 1.06 ppm, 2.41 2.47 triplet, 3H 8, ppm 0.0 8.0 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 20 1.5...
label the spectrum OTBS Meo Yome Me H NMR spectrum (CDC13, 400 MHz) 8.5 8.0 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 f1 (ppm) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 -0.5 18C NMR spectrum (CDCI, 100 MHz) 210 200 190 180 170 160 150 140 130 120 110 100 fi (ppm) 90 80 70 60 50 40 30 20 10 -10
18. Draw the structures of Compound 18a. and 18b. (18 pts), clearly indicate your assignments of all proton resonances (8 pts). Calculate the Unsaturation Index of each compound (4 pts) (30 points total) 3.0 2.00 Unsat. Index = (2C + 2 - H - X + N)/2 = 2.5 e = 2.00 ppm, singlet, 2H f = 1.27 ppm, 4.90 2.0 7.20 Compound 18a: C1,4402 triplet, 3H d = 2.66 ppm, 1.27 1.5 c = 4.90 ppm, quartet, 2H a...
Please help me interpret the proton NMR of this unknown aldehyde. ZACH RIA A3 2 -1400 -1300 -1200 -1100 1000 -900 -800 -700 -600 -500 400 300 -200 -100 -100 -5.5 4.5 -5.0 -3.5 -4.0 -2.5 -3.0 -1.5 -2.0 -0.5 -1.0 f1 (ppm) 0.5 0.0 1.5 1.0 2,5 2.0 4.0 3.5 3.0 Adtyd SE 910- 660-h ar ZACH RIA A3 2 -1400 -1300 -1200 -1100 1000 -900 -800 -700 -600 -500 400 300 -200 -100 -100 -5.5 4.5 -5.0 -3.5...
Fill out the tables below of the starting material and pure product by using the given NMR spectrums. Identify if the pure isomer of methyl nitrobenzoate as ortho, meta, or para. Complete the table below using your proton NMR spectrum of your starting material. Be sure to include all peaks. Note: The table is expandable. Use the structure below for the letter assignments in your table. Splitting Integration Assignment Peak (ppm) Other Notes -7.95 -7.92 0627 -787 785 7.30 751...