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Nmr Questions
Nmr Questions
Propose structures for the following isomeric alcohols that give the 13C NMR spectra below. Assign the carbons to their respective peaks. A table of chemical shifts is located on page 43.
Predict the structure of the compound that gives the spectrum shown below. Upon shaking the sample with D2O, the doublet at 2.2 ppm disappears from the spectrum and the peak at 3.7 ppm simplifies to a clean sextet. Calculate the degree of unsaturation of
The doublets observed for the alkene protons in the NMR spectra of trans-3-chloropropenoic acid and cis-3-chloropropenoic acid have the same chemical shift, but the J value for one is 14 Hz and the other is 9 Hz. Which is the trans acid and which is the c
The 1H NMR for 2,3-dibromobutane has a doublet at 1.8 ppm and a quartet at 4.5 ppm. Draw the compound and assign the peaks in the spectrum to their respective protons.
Provide structures that are consistent with the following 1H NMR spectra. Calculate the degree of unsaturation of each compound first. Assign the protons to their respective peaks.
Ms of compound J
Propose a structure for an acyclic alkane having the following spectrum. The results of the DEPT spectra are given following the signals. Include a condensed structure to provide your answer.
Use a condensed structure to provide your answer. Propose a structure for an acyclic alkane having the following spectrum. The results of the DEPT spectra are given following the signals.
When 3-bromo-2,2-dimethylbutane is treated with potassium tert-butoxide, a single product, A, having the formula C6H12 is formed. When 3,3-dimethyl-2-butanol is treated with sulfuric acid, the major product, B, has the formula C6H12. Given the following N
Draw the condensed structure of 2,2-dimethylbutane. b.) Estimate what the 1H NMR spectrum of 2,2-dimethylbutane is expected to look like. c.) Clearly label each proton environments and match each to its signal. d.) Be sure to include appropriate splitting
Propose the structure of a disubstituted geminal alkene that fits the following NMR spectrum.
Propose the structure of a monosubstituted geminal alkene that fits the following NMR spectrum.
Use a condensed structure to provide your answer. Propose a structure for an acyclic alkane having the following spectrum. The results of the DEPT spectra are given following the signals.
How many 1H NMR signals do each of the planar cyclic compounds display?
Propose structures for the following isomeric alcohols that give the 13C NMR spectra below. Assign the carbons to their respective peaks.
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