CHM 2410Z - Organic Chemistry I Lab 2) Consider the following molecules and choose the two represented by the spectra below. Use the IR spectra to narrow the possibilities, and then use the NMR data to confirm your choice. OH liom ная a. 1H NMR data: OH 83.6 ppm (2H, quartet) 8 3.0 ppm (1H, triplet) 8 2.6 ppm (2H, triplet) 82.2 ppm (3H, singlet) 8 1.8 ppm (2H, pentet) b. 1H NMR data: 83.7 ppm (3H, singlet) 82.6 ppm (1H, septet (7)) 81.2 ppm (6H, doublet) OH IR spectrum: TINC 4000 IR spectrum: OH br 3000 0.8 0.6 0.4 2000 B 3000 1500 2000 Wavenumber (cm-1) OCH 3 1000 1000

CHM 2410Z - Organic Chemistry I Lab 2) Consider the following molecules and choose the two represented by the spectra below. Use the IR spectra to narrow the possibilities, and then use the NMR data to confirm your choice. OH liom ная a. 1H NMR data: OH 83.6 ppm (2H, quartet) 8 3.0 ppm (1H, triplet) 8 2.6 ppm (2H, triplet) 82.2 ppm (3H, singlet) 8 1.8 ppm (2H, pentet) b. 1H NMR data: 83.7 ppm (3H, singlet) 82.6 ppm (1H, septet (7)) 81.2 ppm (6H, doublet) OH IR spectrum: TINC 4000 IR spectrum: OH br 3000 0.8 0.6 0.4 2000 B 3000 1500 2000 Wavenumber (cm-1) OCH 3 1000 1000

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

ChapterL3: Carbon (13c) Nmr Spectroscopy

Section: Chapter Questions

Problem 20CTQ

See similar textbooks

Similar questions

Given below are the ¹H NMR spectra of two isomeric compounds with the molecular formula C4H₂O₂. Spectrum X 3 C₂HgO₂ 11 Spectrum Y 10 9 8 0 11 10 ppm Using the following choices, determine which compound corresponds to which spectrum. LOCH 3 A. B. C. b D. C₂H₂O₂ مله 6 OH pom 3 6
The following are all isomers of C10H140. Match the most appropriate structure to the NMR spectra shown below. Make sure to justify your selection using the data. D Он Which of the C1,H¾0 isomers above fits the following NMR spectrum best? 3H. d - - 3H. I 1H. s (disappears in DO) 2H. d 2H. d 2H. pentet 1H, sexlel 0 5. 5.0 4.0 ipan) 4.5 29 w bor
CHM 2410Z - Organic Chemistry I Lab 1) Consider the following molecules and choose the two represented by the spectra below. Use the IR spectra to narrow the possibilities, and then use the NMR data to confirm your choice. a. 1H NMR data: 85.8 ppm (1H, pentet) 85.0 ppm (1H, triplet) 8 4.9 ppm (1H, triplet) 83.6 ppm (2H, triplet) 8 2.2 ppm (2H, quartet) 82.1 ppm (1H, singlet) 8 1.7 ppm (2H, pentet) b. 1H NMR data: 8 2.4 ppm (2H, triplet) 82.1 ppm (3H, singlet) 8 1.6 ppm (2H, sextet) 8 0.9 ppm (3H, triplet) IR/NMR Postlab i IR spectrum: IR spectrum: Relative Transmittance 0.8 0.6 0.4 0.2 0.8 0.6 0.4 0.2 3000 3000 OH H 2000 H 2000 Wavenumber (cm-1) Wavenumber (cm-1) H 1000 1000 OH
I. Identify the structure best consistent with the data and II. Justify your choice in 1-2 short sentences citing specific spectral data as evidence. 1H NMR465621 Cmar 2/ Klosterman W22 ©2022 otonan 3H CPossible Chemical FS 6H 2H Structures 3H 1H OH llulle terman CHEM4 022 J Klosterman G22 ©2022 HOM40B W22 HO an MADB WZ ОН erman Kostermy Extra credit: What reagents did Prof. Slughorn use to make Chemical F? 1H 22 Klostermah CHEM40B Hz, 2H), 1.50 (sep, J = 7.0 Hz, 1H), 1.24 (s, 3H), 0.90 (t, J = 7.0 Hz, an 3 Molecular Formula: 40B/ OH NMR: 6 signals ppm o 2022 | Klosterma 0.88 (d, J = 7.0 Hz, 6H) ppm singlet at 1.80 ppm exchanges with D20. HEM40B CHEM408 aterr
WYY 9. 8 7 6. 4 PPM 3 1 0. Which of the following structures matches the 'H-NMR spectum provided above? H A) HH C' H. H B) H-C H D) HH C C) H-C C, C' H. H. C' C H-CCNO2 TH. Hc^NO2 H. 8.219 8.169 8.151 1.002 900 [ 1.003 | 1.001 0.987 5.270 | 1.998 4.608 2.
Need a help a little with HNMR question please! Thank you Part 3B Set 1. Can 1H NMR spectroscopy be used to differentiate between the two compounds? Briefly explain why or why not. Predict the 1H NMR spectrum for each compound (include integration, multiplicity, and approximate chemical shift). Either draw the actual spectrum or put in a data table format.
A L K F OCH2CH,CH(CI)CH3 E OH *C, H and "I" have been intentionally not used as labels to avoid being confused with carbon, hydrogen and iodine a) For 1H NMR, what multiplicities would you expect for the hydrogens labeled a, d, f and g? b) Which of the hydrogens is most upfield? Why? (besides its position on the NMR chart) c) How many C resonances do you expect for this molecule? DO EITHER D OR E d) Explain how you would determine the molecular ion peak in the mass spectrum? e) Briefly discuss three major bands you would see in the Infra red. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).
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:
Need some assistance with NMR question please! Thank you so much! Part 3B Set 2. Can 1H NMR spectroscopy be used to differentiate between the two compounds? Briefly explain why or why not. Predict the 1H NMR spectrum for each compound (include integration, multiplicity, and approximate chemical shift). Either draw the actual spectrum or put in a data table format.
I have an NMR spectrum. There are 5 peaks. There is a doublet at 9.6 ppm (integrates to 2H) where aldehydes usually arise, don't know why there is a doublet. There is another doublet at 6.8 ppm, again integrating to 2H. There is a singlet at 4.5 ppm, integrating to 1H. There is a quartet at 3.4 ppm integrating to 2H, and lastly there is triplet at 1.2 ppm integrating to 3H. i recofnize the ethyl group but don't understand the peak at 9.6 unless it is not an aldehyde.
17. The following proton NMR spectrum of a compound of molecular formula C3H8O 10 9 ©2017 Pearson Education, Inc. 8 6 H3C OHz H 50Hz 4.18 4.08 5 8 (ppm) 4 OHz 50Hz 1.38 1.28 a) Propose a structure for this compound. (Hint: Find IHD first) C+1-H+1/2/2 3+1-1/2 3 O (b) Assign peaks to show which protons give rise to which signals in the spectrum 0
8 of 15 || | 140 80 PPM 60 40 120 100 Which of the following structures matches the 13C-NMR spectum provided above? CH3 O=C B) C) D) A) H3C- CH2 HC H. C' H. H. C. C H3C H. H-Cċ. H. H. H. CH3 OA B. CIC CH 20 21.3