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…

Macroscale and Microscale Organic Experiments

7th Edition

ISBN:9781305577190

Author:Kenneth L. Williamson, Katherine M. Masters

Publisher:Kenneth L. Williamson, Katherine M. Masters

Chapter19: Alkenes From Alcohols: Cyclohexene From Cyclohexanol

Section: Chapter Questions

Problem 4Q

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27. NO AI USE
28. NO AI USE
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
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?
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 :-
5. Use the 1H-NMR data to determine the structure of the compounds listed below. Indicate which hydrogens are responsible for each signal. a. C2H4C|z: singlet at s 3.7 ppm b. C8H10: § 1.2 ppm (triplet, 3H) § 2.6 ppm (quartet, 2H) § 7.1 ppm (broad singlet, 5H)
Magnetically equivalent protons give a single signal in 1H-NMR. How many signals will be observed in the 1H-NMR spectrum of the compound in the figure? (TO). 4 (B). 6C). 8 (D). 10 CH3
Which compound is correct for the given NMR spectrum? |(3) (2) (2) 2 1 PPM CN 1) 2) 3) Structure 1 O Structure 2 Structure 3
B.19 What major IR absorptions are present above 1500 cm ¹ for each compound? a. b. C. d. OH OH
Draw the structural formula that is consistent with the of the HNMR spectra shown below
The MS and 13C NMR spectra for two constitutional isomers with 4 degrees of unsaturation are shown below. Determine the molecular structures of the two constitutional isomers.
Please answer just the question number 2. (not 1. and 3.).

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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