
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Question

Transcribed Image Text:Unknown 3
9
200
4000
8
7
6
3000
5
180 160 140 120 100
4
2000
80
1500
wavenumber (1/cm)
60
2
40
1
20
0
0
¹H NMR data
0 (ppm) multiplicity integration
0.86
t
3
1.50
2.02
6.71
7.24
my
1000
13C NMR data
(ppm)
13.7
19.0
37.9
176.4
500
sextet
t
S
S
2
2
1
1
Expert Solution

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Step 1
NMR SPECTROSCOPY
By capturing the interaction of radiofrequency (Rf) electromagnetic radiations with the nuclei of molecules put in a high magnetic field, nuclear magnetic resonance (NMR) spectroscopy allows scientists to analyse molecules.
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- Analyze the 13C NMR spectrum for the C5H1CI compound shown below and determine a structure. Assign all the carbons. Chemical Shift(ppm) Multiplicity 57.3 triplet 33.1 singlet 27.3 quartetarrow_forwardDraw the splitting pattern and assign and label the H of the spectrum of C4H8Oarrow_forward18. Proton NMR spectra are given together with molecular formula. Propose a structure that corresponds to each spectrum. (Hint: Find IHD first). Assign peaks to show which protons give rise to which peaks 10 10 10 (b) C4H8O₂ Offset: 2.4 ppm (b) C₂H100 9 (c) CsHgO₂ 9 8 8 7 7 6 6 6 5 8 (ppm) OHz 5 8 (ppm) 4 3.08 2.98 2.88 2.78 8 (ppm) 50Hz 4 4 3 2 1 0 0arrow_forward
- NMR data Summary NMR solvent: DMSO-d6 'H NMR: Splitting (Multiplicity) Integration Chemical Shift 9.67 singlet 1H singlet doublet 9.17 7.37 6.72 2.00 1H 2H doublet singlet 2H 3H 1"C NMR: Chemical Shift 167.8 153.3 131.1 121.1 115.1 23.8 15N NMR: Chemical Shift 132.3 Instructions: Step 0: Look at the structure of Tylenol. Determine integration, and splitting you are expecting in the 'H NMR. Step 1: Look at the integration and splitting of the signals in the H NMR spectrum - assign the chemical shift of the protons of the methyl group; make a note which signals in the 'H NMR are due aromatic protons, NH and/or OH. Step 2: Look at the 'HSN HSQC spectrum - Use this spectrum to assign the chemical shifts of the NH proton and the OH proton. Step 3: Look at the 'H1SN HMBC spectrum - Use this spectrum to assign the chemical shifts of the aromatic protons in the 'H NMR. Step 4: Look at the 13C NMR spectrum - Make a note which carbon atoms are aromatic and/or alkyl. Assign the chemical shift of…arrow_forwardWhat is the structure of the compound with molecular formula C5 H10 Oarrow_forwardStep-by-step solutionarrow_forward
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