1. In a mass spectrum, aldehydes containing a hydrogen atom in the gamma position will likely...
1. In a mass spectrum, aldehydes containing a hydrogen atom in the gamma position will likely exhibit which of the following common fragmentation patterns? Select all that apply. A : McLafferty rearrangement B : dehydration C : beta cleavage D : delta cleavage
2. A molecule containing which of the following atoms will produce M+• and (M+2)+• peaks of equal intensity? A : Nitrogen B : Chlorine C : Oxygen D : Carbon E : Bromine
3. How many rings are found in an alkane with a formula of C
8H 12.
(Enter a whole number
only)
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1. In a mass spectrum, aldehydes containing a hydrogen atom in
the gamma position will likely...
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:
5 The parent peak in the mass spectrum shown below is at 100 80 6o 40...
5 The parent peak in the mass spectrum shown below is at 100 80 6o 40 C 20 10 20 3 40 070 90 m/z (a) m/z 58 (b) m/z -71 (c) m/z - 86 (d) m/z 43 6 In mass spectrometry of the following organic compound, which of the following fragmentation pathway is not likely to occur? H3C CH H3C (a) dehydration (b) Alpha-cleavage (c) McLafferty rearrangement (d) All of these
Name: 2.2 Hydrogen The relative isotopic abundance for hydrogen 2H: 1H is about 0.00016: 1, and...
Name: 2.2 Hydrogen The relative isotopic abundance for hydrogen 2H: 1H is about 0.00016: 1, and therefore hydrogen isotopic substitutions are unlikely to play a major role in any observed (M+1) peak. The isotope 2H is called "heavy hydrogen or deuterium, and is given the symbol D. We can often provide support for mechanisms by incorporating isotopes such as 13C or D into compounds using isotopically labelled reagents. Mass spectrometry is a useful tool for analyzing such isotopic incorporation by...
180 140 100 200 160 120 80 60 40 20 11 10 9 6 pm 7 3 2 ppm 100- 80- 60- 40- 20- 75 100 125 150 25 50 m/z Relative...
180 140 100 200 160 120 80 60 40 20 11 10 9 6 pm 7 3 2 ppm 100- 80- 60- 40- 20- 75 100 125 150 25 50 m/z Relative Intensity o Write all of your notes on the spectra Type a justification of each structure in the same order they appear in your stapled packet o Insert page breaks so each structure is on a separate page o Include page numbers o Type your name in the...
hello, i dont know if i have done my mass specturm and ir sepctrum worksheet correctly....
hello, i dont know if i have done my mass specturm and ir sepctrum
worksheet correctly. Does it look right? thank you for all ur help!
47,09 +6.59 53.68 100-53,68=46.32% remaining due to Oxygen 89.09. He = 12.011 H=2.94 of 15,944 c=47.09% 89.09 -2.98=3 301026. gtmol - t = 6.59% 5 CIH201 C3H603 C289.098.4709=41.95 g 47.09% x 89.09 anol Imol = 3.49 mol noles c-c 100 ma compeha 12.olg . saoaghel & Imolt -5,81 mol TOO ^ malcomp hola- 90...
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:
5 The parent peak in the mass spectrum shown below is at 100 80 6o 40 C 20 10 20 3 40 070 90 m/z (a) m/z 58 (b) m/z -71 (c) m/z - 86 (d) m/z 43 6 In mass spectrometry of the following organic compound, which of the following fragmentation pathway is not likely to occur? H3C CH H3C (a) dehydration (b) Alpha-cleavage (c) McLafferty rearrangement (d) All of these
Name: 2.2 Hydrogen The relative isotopic abundance for hydrogen 2H: 1H is about 0.00016: 1, and therefore hydrogen isotopic substitutions are unlikely to play a major role in any observed (M+1) peak. The isotope 2H is called "heavy hydrogen or deuterium, and is given the symbol D. We can often provide support for mechanisms by incorporating isotopes such as 13C or D into compounds using isotopically labelled reagents. Mass spectrometry is a useful tool for analyzing such isotopic incorporation by...
180 140 100 200 160 120 80 60 40 20 11 10 9 6 pm 7 3 2 ppm 100- 80- 60- 40- 20- 75 100 125 150 25 50 m/z Relative Intensity o Write all of your notes on the spectra Type a justification of each structure in the same order they appear in your stapled packet o Insert page breaks so each structure is on a separate page o Include page numbers o Type your name in the...
hello, i dont know if i have done my mass specturm and ir sepctrum
worksheet correctly. Does it look right? thank you for all ur help!
47,09 +6.59 53.68 100-53,68=46.32% remaining due to Oxygen 89.09. He = 12.011 H=2.94 of 15,944 c=47.09% 89.09 -2.98=3 301026. gtmol - t = 6.59% 5 CIH201 C3H603 C289.098.4709=41.95 g 47.09% x 89.09 anol Imol = 3.49 mol noles c-c 100 ma compeha 12.olg . saoaghel & Imolt -5,81 mol TOO ^ malcomp hola- 90...
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