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The mass spectrum of pentanal shows a peak at m/z 43. The molecular weight of pentanal...
The mass spectrum of isopropyl ether is shown below. Draw the radical cation giving the molecular...
The mass spectrum of isopropyl ether is shown below. Draw the radical cation giving the molecular ion. Be sure to include the nonbonding electrons on the oxygen. Identify the fragment giving rise to the peak at m/z = 87. Be sure to include the nonbonding electrons on the oxygen.
The mass spectrum of compound A shows molecular ion peak at m/z 88. The IR spectrum...
The mass spectrum of compound A shows molecular ion peak at m/z 88. The IR spectrum of this compound has a broad peak between 3200 and 3550 cm-1. The 1H NMR spectrum of A shows the following peaks: a triplet at d 0.9, a singlet at d 1.1, one more singlet at d 1.15, and a quartet at d 1.6. The area ratio of these peaks is 3:6:1:2. The 13C NMR contains 4 signals. In the space below, propose a...
A. One mechanism of fragmentation is loss of a neutral radical by cleavage of a bond...
A. One mechanism of fragmentation is loss of a neutral radical by cleavage of a bond from which one electron has been lost. What is the m/z ratio of the most stable cationic fragment that can be generated from dexchlorpheniramine by this mechanism? Show the structure of the fragment and discuss charge stabilization. B. The base peak in the dexchlorpheniramine mass spectrum occurs at m/z 203. A peak with relative intensity 33.1 occurs at m/z 205. Interpret this information with...
2. Draw the structure of the cation responsible for the base peak (m/z=58) in the mass...
2. Draw the structure of the cation responsible for the base
peak (m/z=58) in the mass spectrum of 3-aminopentane shown
below:
3. Below is given the mass spectrum of a simple alkane. What is
the chemical formula of the alkane? What is the name of the alkane?
Explain how you determined the exact structure of the alkane from
the observed fragments.
4. Below is a mass spectrum of an ester. Identify the ester.
Consider that the dominant fragmentation pathway involves...
Name: Starting with the mass spectrum of n-heptane What is the molecular ion? What fragment is...
Name: Starting with the mass spectrum of n-heptane What is the molecular ion? What fragment is lost to generate the ion with m/z =71? What cation does the peak at m/z = 43 represent? What group does the spacing between each set of ions represent? Why is the peak at (M-15), corresponding to loss of -CH3 so small? Draw the structure of 2,4-dimethylpentane What is the structure of the ion responsible for m/z = 85? Relative Intensity What is the...
4. Propose a structure for a molecule whose mass spectrum shows a parent ion at m/z...
4. Propose a structure for a molecule whose mass spectrum shows a parent ion at m/z 100 with a base peak at m/z 43, an IR peak at 1720 cm' which gave the following 'H NMR spectrum. 33 N - PPM 5. Propose a structure for a molecule whose mass spectrum shows a parent ion at m/z 100 with a base peak at m/z 43, an IR peak at 1720 cm' which gave the following 'H NMR spectrum. doublet 2...
Given the parent compound, draw the mass spectrum fragment that is observed at m/z 43. Include...
Given the parent compound, draw the mass spectrum fragment that
is observed at m/z 43. Include any hydrogen atoms and the positive
charge.
Draw the mass spectrum for Vinyl Acetate: C4H6O2 a. Draw out the structure. b. Label the...
Draw the mass spectrum for Vinyl Acetate: C4H6O2
a. Draw out the structure. b. Label the molecular ion peak and base peak. C. Assign structures to the fragment ion peaks at m/e 43, m/e 28 and m/e 15. 100 (43-Base Peak Relative Intensity 20 28 15 86 Mt TTT 20 60 100 120 160 140 mle
Mass Spec Diethyl Phthalate Mass Spectrum Relative Intensity m/z MS diethylphthalate (note: major m/z values of...
Mass Spec Diethyl Phthalate Mass Spectrum Relative Intensity m/z MS diethylphthalate (note: major m/z values of 222, 193, 177, 149 are present) 3) Propose structures for TWO fragments in the mass spectrum. Note: the molecular ion peak at 222 m/z is NOT a fragment.
Show what fragment is responsible for the base peak at m/z 44 in the mass spectrum...
Show what fragment is responsible for the base peak at m/z 44 in the mass spectrum of butan-2-amine
The mass spectrum of isopropyl ether is shown below. Draw the radical cation giving the molecular ion. Be sure to include the nonbonding electrons on the oxygen. Identify the fragment giving rise to the peak at m/z = 87. Be sure to include the nonbonding electrons on the oxygen.
2. Draw the structure of the cation responsible for the base
peak (m/z=58) in the mass spectrum of 3-aminopentane shown
below:
3. Below is given the mass spectrum of a simple alkane. What is
the chemical formula of the alkane? What is the name of the alkane?
Explain how you determined the exact structure of the alkane from
the observed fragments.
4. Below is a mass spectrum of an ester. Identify the ester.
Consider that the dominant fragmentation pathway involves...
Name: Starting with the mass spectrum of n-heptane What is the molecular ion? What fragment is lost to generate the ion with m/z =71? What cation does the peak at m/z = 43 represent? What group does the spacing between each set of ions represent? Why is the peak at (M-15), corresponding to loss of -CH3 so small? Draw the structure of 2,4-dimethylpentane What is the structure of the ion responsible for m/z = 85? Relative Intensity What is the...
4. Propose a structure for a molecule whose mass spectrum shows a parent ion at m/z 100 with a base peak at m/z 43, an IR peak at 1720 cm' which gave the following 'H NMR spectrum. 33 N - PPM 5. Propose a structure for a molecule whose mass spectrum shows a parent ion at m/z 100 with a base peak at m/z 43, an IR peak at 1720 cm' which gave the following 'H NMR spectrum. doublet 2...
Given the parent compound, draw the mass spectrum fragment that
is observed at m/z 43. Include any hydrogen atoms and the positive
charge.
Draw the mass spectrum for Vinyl Acetate: C4H6O2
a. Draw out the structure. b. Label the molecular ion peak and base peak. C. Assign structures to the fragment ion peaks at m/e 43, m/e 28 and m/e 15. 100 (43-Base Peak Relative Intensity 20 28 15 86 Mt TTT 20 60 100 120 160 140 mle
Mass Spec Diethyl Phthalate Mass Spectrum Relative Intensity m/z MS diethylphthalate (note: major m/z values of 222, 193, 177, 149 are present) 3) Propose structures for TWO fragments in the mass spectrum. Note: the molecular ion peak at 222 m/z is NOT a fragment.
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