Mapouo Sapling Learning this question has been customized Craig Jasperse at Minn
ID: 587416 • Letter: M
Question
Mapouo Sapling Learning this question has been customized Craig Jasperse at Minnesota State University, Moorhead Construct a simulated H NMR spectrum for ethanol, CH3CH2OH. Assume that the hydroxyl proton is not coupled with any other protons. Drag the appropriate splitting patterns to the approximate chemical shift positions. Splitting patterns may be used more than once, or not at all, as needed. Likewise, some chemical shift bins might remain blank. Note that peak heights are arbitrary and do not indicate proton integrations. We are given that the hydrotynl proton is not coupled with any other protons Therefore, its resonance will appear as a singlet. Keep in mind that electronegative groups move chemical shifts downfield (i.e., to higher ppm values). The hydroxyl proton is attached to an electronegative atom and will be strongly shifted downfiel ppmExplanation / Answer
Spectroscopic analysis of oragnic compounds
1) 1H NMR for CH3CH2OH
1.1 ppm (triplet, 3H) for CH3 next to CH2
2.4 ppm (singlet, 1H) for -OH proton
3.6 ppm (quartet, 2H) for CH2 between CH3 and OH
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2) 1H NMR prediction for 3-methyl-1-pentanol
H's Chem.shift Splitting
a 0.8 ppm triplet
b 1.2 ppm quintet
c 1.4 ppm multiplet
d 0.9 ppm doublet
e 1.6 ppm quartet
f 3.6 ppm triplet
g 2.3 ppm singlet
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3) 1H NMR for CH3CHCl2
1.7 ppm (doublet, 3H) for CH3
5.4 ppm (quartet, 1H) for CH
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4) five membered lactone 1H NMR
1.2 ppm (triplet, 3H) for CH3 next to CH2
2.5 ppm (quartet, 2H) for CH2 next to CH3 and alkenic quaternary carbon
4.6 ppm (singlet, 2H) for CH2 between oxygen and alkenic carbon
3.5 ppm (singlet, 1H) for OH proton