26. NO AI USE Predict the number of signals in the expected 13C NMR spectrum of the followingcompound:Hint: consider plane of symmetry5 (five)Carbon Signals6 (six)Carbon Signals7 (seven)Carbon Signals8 (eight)Carbon SignalsA.B.C.D.ABCD

Step 1: 13C NMR13C NMR spectroscopy which determines the different carbon connectivity in a…

Answered: Predict the number of signals in the…

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter16: Introduction To Magnetic Spectroscopy

Section: Chapter Questions

Problem 16.51E

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27. NO AI USE
28. NO AI USE
G.287.
Using a 300 MHz NMR instrument:a.) How many Hz downfield from TMS is a signal at 2.5 ppm?b.) If a signal comes at 1200 Hz downfield from TMS, at what ppm does itoccur?c.) If two signals are separated by 2 ppm, how many Hz does thiscorrespond to?
6. The MS and 13C NMR spectra for two constitutional Isomers with 4 degrees of unsaturation are shown below. Please determine the molecular structures of the two constitutional isomers. ISOMER A ISOMER B 100 - 100- 80 80 - 60- 60- 40- MTs 140 20- 20- 25 50 100 125 25 s0 100 125 m/z m/z Speales tofat -Zpeaks 200 180 160 140 120 100 80 60 40 20 200 180 160 140 120 100 80 60 40 20 CoS-00-887 ppm CoS-00-686 pm Relative Intensity Relative Intensity
Please write the answer clearly if it is handwritten thank you I really appreciate it.
Explain when a sample is said to be NMR active or non-NMR active?
Using a 300 MHz NMR instrument:a. How many Hz downfield from TMS is a signal at 2.5 ppm?b. If a signal comes at 1200 Hz downeld from TMS, at what ppm does it occur?c. If two signals are separated by 2 ppm, how many Hz does this correspond to?
How many 13C NMR signals does attached compound exhibit ?
only circled ones
Identify the number of signals observed for the following 4 molecules in 13C NMR and H NMR spectroscopy respectively. (Enter the values separated by a comma without any space in between, eg. 1,1 etc.) HO 'HO, 2 CI Compound 1 Compound 2 Compound 3 Compound 4
6. The MS and 13C NMR spectra for two constitutional isomers with 4 degrees of unsaturation are shown below. Please determine the molecular structures of the two constitutional isomers. ISOMER A ISOMER B 100 100- 80 - 80 60 - 60 40 MTS 140 40 20 20- 25 50 75 100 125 25 50 75 100 125 m/z m/z 3 peales tatal , 2 peaks 200 180 160 140 120 100 80 60 40 20 200 180 160 140 120 100 80 60 40 20 COS-00-887 ppm COS-00-886 ppm Relative Intensity Relative Intensity :-

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Predict the number of signals in the expected 13C NMR spectrum of the following compound: Hint: consider plane of symmetry 5 (five) Carbon Signals 6 (six) Carbon Signals 7 (seven) Carbon Signals 8 (eight) Carbon Signals A. B. C. D. A B C D