How can the major product be identified in the infrared spectrum?A medium strong peak at 1674 cm1O A small peak at 1648 cm1O A strong peak at 1038-1050 cm1A broad peak from 3200-3500 cm1O A strong peak at 1649 cm1

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Answered: How can the major product be identified…

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

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The 1H and 13C NMR spectra of compound A, C8H9Br, are shown. Propose a structure for A, and assign peaks in the spectra to your structure.
3-Bromo-1-phenyl-1-propene shows a complex NMR spectrum in which the vinylic proton at C2 is coupled with both the C1 vinylic proton (J = 16 Hz) and the C3 methylene protons (J = 8 Hz). Draw a tree diagram for the C2 proton signal, and account for the fact that a five-line multiplet is observed.
Would you expect two diastereomers such as meso-2, 3-dibromobutane and (2R, 3R)-dibromobutane to have identical or different IR spectra? Explain.
Assign each peak on the following spectrum.
An unknown compound (x) contains only carbon and hydrogen, has MW=112 and exhibits the spectral data below. In addition to the IR signal listed below, there are only peaks corresponding to C-H stretches (between 3300 and 2900) and several in the "fingerprint region". IR (cm-1) 2145 CNMR (ppm) 77.8, 70.1, 30.2 H NMR (ppm) 2.45 (singlet)
Predict the structure of the compound using the information below. From IR Spectra: Broad peak at 3500-3200 cm-1 Medium peak at 750 cm-1 From Mass Spectra M+ = 108 M+2 = 110 (with 3:1 peak ratio) From Proton NMR Spectra See attached picture.
Propose a structure consistent with each set of spectral data: a. C4H8Br2: IR peak at 3000–2850 cm−1; NMR (ppm): 1.87 (singlet, 6 H) 3.86 (singlet, 2 H) b.C3H6Br2: IR peak at 3000–2850 cm−1; NMR (ppm): 2.4 (quintet) 3.5 (triplet) c. C5H10O2: IR peak at 1740 cm−1; NMR (ppm): 1.15 (triplet, 3 H) 2.30 (quartet, 2 H) 1.25 (triplet, 3 H) 4.72 (quartet, 2 H) d.C3H6O: IR peak at 1730 cm−1; NMR (ppm): 1.11 (triplet) 2.46 (multiplet) 9.79 (triplet)
Propose a structure consistent with each set of spectral data: a.C6H14O: IR peak at 3600−3200 cm−1; NMR (ppm): 0.8 (triplet, 6 H) 1.5 (quartet, 4 H) 1.0 (singlet, 3 H) 1.6 (singlet, 1 H) b.C6H14O: IR peak at 3000−2850 cm−1; NMR (ppm): 1.10 (doublet, relative area = 6) 3.60 (septet, relative area = 1)
What is the standard solvent in both 1H and 13C NMR? A. (CH3)4Si B. D2O C. CDCl3 D. C6H6 E. none of the above
Assign as many peaks as possible in the unknown #1 (C8H8O) IR Spectrum.
What best describes the IR spectrum of NaCl? A broad peak at 3400 cm-1 A strong peak at 1700 cm-1 No peaks are observed A weak peak just above 3000 cm-1
Identify the structures of isomers E and F (molecular formula C4H8O2).Relative areas are given above each signal.a.) Compound E: IR absorption at 1743 cm−1 b.) Compound F: IR absorption at 1730 cm−1

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How can the major product be identified in the infrared spectrum? A medium strong peak at 1674 cm1 O A small peak at 1648 cm1 O A strong peak at 1038-1050 cm1 A broad peak from 3200-3500 cm1 O A strong peak at 1649 cm1