Task 2: Systematically analyze the IR spectra 1-4 presented on the following pages and match them with the structures of compounds indicated below. Label the diagnostic absorptions on the spectra and then complete the table below each spectrum. Note: The number of structures provided below is more than the number of spectra provided. The structures indicated below are constitutional isomers of C4H602. OH HO. HO HO. compound 1 compound 2 compound 3 compound 4 compound 5 compound 6 Spectrum 1: FTIR NEAT 100 90 80 3p93.3 1625,7- 592.9 70 406 9 848.5636.4 60 977.7 I1294.0 50 L9507877. 40 1020. 30 1646.9 1371.1 20 1137.8 1762.6 12188 45 00 42 50 4000 37 50 3500 32 50 30 00 27 50 2500 2000 2250 1750 1500 1250 1000 750 500 250 Wavenumbers (cm-1) ©20 18, Sigma-Aldrich Co. ALL RIGHTS RESERVED Bond vibration Expected frequency range (cm-1) (from IR absorption table) Observed absorption (cm-1) Functional group(s): Structure: % Transmittance

Task 2: Systematically analyze the IR spectra 1-4 presented on the following pages and match them with the structures of compounds indicated below. Label the diagnostic absorptions on the spectra and then complete the table below each spectrum. Note: The number of structures provided below is more than the number of spectra provided. The structures indicated below are constitutional isomers of C4H602. OH HO. HO HO. compound 1 compound 2 compound 3 compound 4 compound 5 compound 6 Spectrum 1: FTIR NEAT 100 90 80 3p93.3 1625,7- 592.9 70 406 9 848.5636.4 60 977.7 I1294.0 50 L9507877. 40 1020. 30 1646.9 1371.1 20 1137.8 1762.6 12188 45 00 42 50 4000 37 50 3500 32 50 30 00 27 50 2500 2000 2250 1750 1500 1250 1000 750 500 250 Wavenumbers (cm-1) ©20 18, Sigma-Aldrich Co. ALL RIGHTS RESERVED Bond vibration Expected frequency range (cm-1) (from IR absorption table) Observed absorption (cm-1) Functional group(s): Structure: % Transmittance

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

ChapterL3: Carbon (13c) Nmr Spectroscopy

Section: Chapter Questions

Problem 14CTQ

See similar textbooks

Similar questions

Below are three MS spectra, Spectra 1, 2, and 3. Each of this mass spectrum corresponds to either Compound A (contains one Cl in the molecular formula), Compound B (one I in the molecular formula), and Compound C (one Br in the molecular formula). Identify which spectra corresponds to which compound. Provide explanations for your choices.
Q2: The proton NMR spectrum is shown for a compound with formula C5H9NO4. The infrared spectrum displays strong bands at 1750 and 1562 cm-1 and a medium-intensity band at 1320 cm-1. The normal carbon- 13 and the DEPT experimental results are tabulated. Draw the structure of this compound. Normal Carbon DEPT-135 DEPT-90 14 ppm Positive No peak No peak 16 Positive 63 Negative No peak 83 Positive Positive 165 No peak No peak Proton spectrum C;H,NO4 0.92 2.01 3.00 3.00 5.0 4.5 4.0 3.5 3.0 25 2.0 1.5 10 0.5 0.0
Q2. This compound has the molecular formula C,H₁,NO₂. Included in this problem are the infrared spectrum, 'H NMR with expansions, and ¹3C NMR spectra data. этотури H Normal Carbon 14 ppm 61 116 SA SA 119 120 129 131 147 167 117 1700 cm DEPT-135 Positive Negative Positive Positive Positive Positive No peak No peak No peak DEPT-90 No peak No peak Positive Positive Positive Positive No peak No peak No peak quartet 10 till l 4 · triplet
Q1: Consider the two spectra shown below. One is for 3-methyl-1-cyclopentanone and the other one is for 3-methyl-1-cyclohexanone. Identify which spectra belongs to one compound explain your reasoning. Identify the important absorption peaks correspond to a functional group. Describe the absorption peaks. am 100 4900 400 3000 d 1500 1300 REG ho DEFE 18 PES SAFE RECERES 100
These are the 1H spectrums for compounds Y and Z (molecular formula on the image). They both show a stretch around 1710cm-1 on the IR spectrum. What are the structures for both Y and Z?
'H a quartet | triplet | CDCI3 200 180 160 140 120 100 20
5. Suppose that the CH3 group connected to the nitrogen in methamphetamine were instead a CH2CH3 group. Briefly describe how the spectrum would change, including the number of signals, the splitting patterns, and integration. Ignore everything that's the same, I'm just looking for the differences. CH2: CH3: 6. Consider the structure of the drug Adderall, shown to the right. Briefly, what differences would you see in the spectrum of Adderall versus the spectrum of methamphetamine? NH3 Part 2: Mechanisms
5) Levothyroxine (containing 4 iodine atoms), an important prescribed medication, is a form of thyroid hormone thyroxine. It is a very important drug that is used to treat patients with thyroid hormone deficiency (hypothyroidism). List all the IR diagnostic peaks for Levothyroxine below by approximating the frequency of IR absorption (in cm ¹) for each functional group on the drug (list them below). Ignore the fingerprint region if it is not important НО. int NH₂ OH
Help with this please
2) The IR spectrum below is of one of the compounds shown. Circle structure that corresponds to the spectrum and label the peaks you used to make your choice. Transmittance (%) OD D 4000 3000 my mm 2000 1500 Wavenumber (cm-¹) 1000 500
1B. 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). Put it in data table format.
A chemist isolates an unknown organic compound with the molecular formula C5H11N and obtains an IR spectrum (shown below). Select the structure that most closely matches the available information on this compound. Note: In case the labeled tick marks on the x-axis are difficult to read they are (from left to right) 4000, 3000, 2000, 1500, 1000, and 500 cm1. LOD 4000 3000 2000 1500 1000 500 HAVENUMB ER I-|| The correct structure is `NH2 NH2 NH a b d -NH2 -NH2 NH e f h TRANSMITTANCEI%I