Part II. Given below are the 'H-NMR spectrum at 300 MHz in CDC13 and mass spectrum using electron ionizationof compound Brian. The FTIR of the said compound showed a strong peak at 1710 cm").Determine the following:(a) molecular Formula and Degree of unsaturation of compound Brian(b) Basing on the given H-NMR spectrum tabulate the following (i) chemical shifts(ii) integration, ciii) multiplicity and (iv) interferences made for each signal(c) Draw the structure of compound Brian.)ΕΙ43412771114 (M+)Hmmm20304050 60708090 100 110 1201H NMR spectrum300 MHz in CDCl32.0alle1.0

Step 1: FTIR1710 cm-1: C=O stretching (Presence of ketone) Step 2: (a)Molecular Mass = 11413C…

Answered: Part II. Given below are the 'H-NMR…

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

ChapterL3: Carbon (13c) Nmr Spectroscopy

Section: Chapter Questions

Problem 9CTQ

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The spectrum below was obtained from KBr sharing, being a compound with formula C2H6O. Determine the compound from the if FTIR spectrum. (b) Discuss how FTIR distinguishes the following compounds: (i) CH3OH and CH3CH2OCH2CH3 (c) which functional groups provide signals in the FTIR spectra: (i) 1700cm-1, (ii) 1550 cm-1 and (iii) 1700 cm-1 and 2510-3000 cm-1
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For the following compounds (a) predict the number of 1H NMR signals, and (b) list the integration ratio of the signals.
Identify all proton environments and predict the chemical shift, multiplicity, coupling constants, observed integration, and number of hydrogens for each environment.
The 1H NMR spectrum of 1,2-dimethoxyethane (CH3OCH2CH2OCH3) recorded on a 300 MHz NMR spectrometer consists of signals at 1017 Hz and 1065 Hz downeld from TMS. (a) Calculate the chemical shift of each absorption. (b) At what frequency would each absorption occur if the spectrum were recorded on a 500 MHz NMR spectrometer?
THIS CAN NOT BE HAND - DRAWN Illustrate using a computer program the molecule from the molecular formula and interpret each of the following 1H NMR spectra. The integration for each peak is given above the peak. All spectra were taken from http://riodb01.ibase.aist.go.jp/sdbs/cgi-bin/direct_frame_top.cgi.
(b) 13C NMR Select the correct answer choices to determine the NMR spectra. This molecule is and as a result would have a total of signals. The carbons labeled as expected to have a higher chemical shift (i.e. be more downfield) than 1 and 8. The respective peaks are Signals would be likely to be the shortest since they ✓hydrogen atoms attached to them. are in height.
Propanoic acid and methyl ethanoate are constitutional isomers. i || CH2 OH (b) (c) оооо Show how to distinguish between them by IR spectroscopy. (Use the Appendix.) (a) Which IR bands would one expect for propanoic acid? CH3 оооо propanoic acid оооо 1200-1250 cm 1375 1450 cm -1 1450-1475 cm 1630-1820 cm -1 -1 1200-1250 cm -1 1375 1450 cm 1450-1475 cm -1 1630-1820 cm Which IR bands would one expect for methyl ethanoate? 1700 1725 cm -1 1200-1250 cm 1375 1450 cm 1450-1475 cm 1630-1820 cm -1 CH3 methyl ethanoate -1 1700 1725 cm -1 -1 1735-1800 cm 2720 cm 2500-3300 cm 1735-1800 cm -1 2720 cm -1 CH3 -1 Which IR bands are unique to, i.e. not shared between, the two sets? -1 -1 -1 -1 2500-3300 cm -1 1700 1725 cm 1735-1800 cm 2720 cm 2500-3300 cm -1 -1 -1 (d) If the IR spectrum shows a band at 3080 cm-¹, which isomer is it? Opropanoic acid Omethyl ethanoate
SPECTROSCOPY - Attached are the IRs for Caffeine and Adenine (Molecular structures on Lab Manual p. 34). Please (a) NAME each compound at the bottom of each spectrum box. (b) Label the major peaks with the proper functional group for each spectrum. 100- Transmittance (%) Transmittance (%) 50- 4000 100 50 3303 34 1673 10 3123 20 1605 4 2982 42 1508 74 2800 43 1471 72 2710 50 1463 74 2892 49 1451 65 2601 68 1419 36 0 4000 3000 2925 4 2854 14 1699 10 1859 10 1699 49 3110 64 1649 31 2954 11 1457 21 1431 37 1404 56 1378 49 1360 49 1326 68 1368 60 1334 43 1309 27 1263 46 1156 81 1126 88 1023 72 3000 1286 63 1240 36 1213 80 1189 62 1072 77 1026 57 974 68 2000 1500 Wavenumber (cm-¹) 940 38 913 55 875 77 849 72 797 64 792 84 724 49 643 49 622 60 543 57 2000 1500 Wavenumber (cm-¹) 81 927 873 77 851 74 769 60 746 23 700 84 646 84 wwwm 638 86 610 57 482 49 1000 -END- 500 1000 500 38
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