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biochemistry

True or False answer part B only Transcribed Image Text: a. A proton with a chemical shift of 600HZ relative to TMS in a 600MHZ

1 min read
Posted on 
April 3rd, 2022
Home biochemistry True or False answer part B only Transcribed Image Text: a. A proton with a chemical shift of 600HZ relative to TMS in a 600MHZ

True or False answer part B only Transcribed Image Text: 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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