True or False Please answer a,b,c a. A proton with a chemical shift of 600HZ relative to TMS in a 600MHZ NMR appearsat 0.5 ppm in a 300 MHz NMR.b. The coupling constant Ja in 1-bromo-2-chloroethane which is 6.0 Hz in a 200 MHzNMR is 12.0 Hz in a 400 MHz NMR.c. 1,1-dimethylcyclohexane at temperatures that prevent conformational interconversionexhibits 6 chemical shifts in the proton NMR spectrum.d. "CNMR spectra cannot normally be integrated without the use of a specialized NMRtechnique because of long relaxation times.e. Protons that are downfield are shieldedf. 1-Chlorocyclohexane has diastereotopic hydrogensg. Non-first order effects in proton NMR spectra are more important as the chemicalshift difference between two protons gets larger than their coupling interaction,

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a. A proton with a chemical shift of 600HZ relative to TMS in a 600MHZ NMR appears at 0.5 ppm in a 300 MHz NMR,

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

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Question

True or False

Please answer a,b,c

a. A proton with a chemical shift of 600HZ relative to TMS in a 600MHZ NMR appears
at 0.5 ppm in a 300 MHz NMR.
b. The coupling constant Ja in 1-bromo-2-chloroethane which is 6.0 Hz in a 200 MHz
NMR is 12.0 Hz in a 400 MHz NMR.
c. 1,1-dimethylcyclohexane at temperatures that prevent conformational interconversion
exhibits 6 chemical shifts in the proton NMR spectrum.
d. "CNMR spectra cannot normally be integrated without the use of a specialized NMR
technique because of long relaxation times.
e. Protons that are downfield are shielded
f. 1-Chlorocyclohexane has diastereotopic hydrogens
g. Non-first order effects in proton NMR spectra are more important as the chemical
shift difference between two protons gets larger than their coupling interaction,

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