What differences or similarities would you expect to see when you compare the mass spectra of...
What differences or similarities would you expect to see when you compare the mass spectra of 1-propanol with the mass spectrum 2-propanol? Draw the structure and indicate the m/z value for the more significant peaks.
Homework Answers
The mass spectra is obtained due to fragmentation of molecule in presence of high energy electrons
The two molecules differe from each other in their mass spectra just due to difference in product obtained by fragmentation in the two.
1) both the give molecules will shod the molecular ion peak at 60
2) The fragmentation pattern will be like :
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What differences or similarities would you expect to see when
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the differences between the spectra. Comment on the isotope patterns that you expect to see for...
the differences between the spectra. Comment on the isotope patterns that you expect to see for each peak Probl peaks at m: 181 (100%), 182 (4.5 %). and 184 (3.4s) were observed. The (see Appendix 5) spectrum revealed peaks at mz 415 (6.4%), 417 (100%), 418 (13.1% ) , 419 (10.2 %), 421 (30.1%), 422 (3.9%) am Relative intensities (%) for different ratios AgNO3 : PPh (a) Account for the results, statin 1:1, 1:2 spectrum was recorded in positive negative...
29. The mass spectrum of the compound shown below has significant fragmentation peaks at m/z 85,...
29. The mass spectrum of the compound shown below has significant fragmentation peaks at m/z 85, 58, 57, 43, and 42. which two of these peaks are due to α-cleavage, and which one of therm is due to a McLafferty rearrangement? 30. Draw the expected 'H NMR spectrum for PhC02CH(CH3)2. Show correct shifts, multiplicities, and # of H-atoms. Finally, indicate which diagnostic IR absorptions you would expect to see for this compound. 6 4 2 0 PPM IR absorbances:
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how many peaks in an IR spectrum would you expect to see that would characterize an...
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Compare your IR spectra (starting material vs. product(s)). Provide a brief summary of what you see...
Compare your IR spectra (starting material vs. product(s)).
Provide a brief summary of what you see in terms of functional
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0 500 009 700 800 006 1100 1200 1300 1400 1500 1600 1700 1800 0061 2000 27 2400 2600 2800 3000 3200 3400 3600 800 -+:+- LIULUI " -* " " + + + . . ii.ii + + +...
Question 2) Draw the chemical structures of the fragments you expect to see in the mass...
Question 2) Draw the chemical structures of the fragments you expect to see in the mass spectra of the following compound (6 points)
Draw the predicted 'H NMR spectrum for the following structure. Make sure you indicate the number...
Draw the predicted 'H NMR spectrum for the following structure. Make sure you indicate the number of hydrogens corresponding to each points) (b) How many signals in the "CH NMR would there be? (2 points) (e) Give three distinctive peaks that would appear in the IR spectrum (3 points) (d) What distinctive feature do you expect to see in the Mass Spectrum? (pom O-CH₃ b ) doubles - - 2 2 -4
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the differences between the spectra. Comment on the isotope patterns that you expect to see for each peak Probl peaks at m: 181 (100%), 182 (4.5 %). and 184 (3.4s) were observed. The (see Appendix 5) spectrum revealed peaks at mz 415 (6.4%), 417 (100%), 418 (13.1% ) , 419 (10.2 %), 421 (30.1%), 422 (3.9%) am Relative intensities (%) for different ratios AgNO3 : PPh (a) Account for the results, statin 1:1, 1:2 spectrum was recorded in positive negative...
29. The mass spectrum of the compound shown below has significant fragmentation peaks at m/z 85, 58, 57, 43, and 42. which two of these peaks are due to α-cleavage, and which one of therm is due to a McLafferty rearrangement? 30. Draw the expected 'H NMR spectrum for PhC02CH(CH3)2. Show correct shifts, multiplicities, and # of H-atoms. Finally, indicate which diagnostic IR absorptions you would expect to see for this compound. 6 4 2 0 PPM IR absorbances:
Compare your IR spectra (starting material vs. product(s)).
Provide a brief summary of what you see in terms of functional
groups for both. Do your results indicate that your dehydration
reaction was successful? Identify the major peaks in the
spectra.
0 500 009 700 800 006 1100 1200 1300 1400 1500 1600 1700 1800 0061 2000 27 2400 2600 2800 3000 3200 3400 3600 800 -+:+- LIULUI " -* " " + + + . . ii.ii + + +...
Question 2) Draw the chemical structures of the fragments you expect to see in the mass spectra of the following compound (6 points)
Draw the predicted 'H NMR spectrum for the following structure. Make sure you indicate the number of hydrogens corresponding to each points) (b) How many signals in the "CH NMR would there be? (2 points) (e) Give three distinctive peaks that would appear in the IR spectrum (3 points) (d) What distinctive feature do you expect to see in the Mass Spectrum? (pom O-CH₃ b ) doubles - - 2 2 -4
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