A mass spectrum shows significant peaks at m/z= 87, 115, 140, and 143. Which of the...
A mass spectrum shows significant peaks at m/z= 87,
115, 140, and 143.
Which of the following compounds is responsible for the mass
spectrum and EXPLAIN WHY.
A. 4,7-dimethyl-octanol
B. 2,6-dimethyl-4-octanol
C. 2,2,4-trimethyl-4-heptanol
Homework Answers
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A mass spectrum shows significant peaks at m/z= 87,
115, 140, and 143.
Which of the...
Please show all work and explanations if possible. Thank you so much! 4. (4pts) A mass spectrum shows significant pe...
Please show all work and explanations if possible.
Thank you so much!
4. (4pts) A mass spectrum shows significant peaks at m/z 87, 115, and 143. Which of the following compounds is responsible for that mass spectrum: 4,7-dimethyl-1-octanol, 2,6-dimethyl-4-octanol, or 2,2,4-trimethyl-4-heptanol? Provide structures of the cationic fragments that support your choice and provide the mechanism for the formation of ONE of these fragments from the molecular ion. он он но
Deduce the ester compound structure with M/Z=136 on this mass spectrum; significant peaks at 51, 77,...
Deduce the ester compound structure with M/Z=136 on this mass
spectrum; significant peaks at 51, 77, 105, 136.
Relative Abundance M(136) 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 mz
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...
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:
9. Propose a structure for a molecule whose mass spectrum shows a parent ion at m/z...
9. Propose a structure for a molecule whose mass spectrum shows a parent ion at m/z 102 (M), IR peaks at 1740 and 1150 cm which gave the following 'H NMR spectrum.) 2 PPM
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...
Problem 13.7 The base peak in the mass spectrum of 2,2,4-trimethylpentane [(CHa)3CCH2CHCH3)2l occurs at m/z 57....
Problem 13.7 The base peak in the mass spectrum of 2,2,4-trimethylpentane [(CHa)3CCH2CHCH3)2l occurs at m/z 57. What ion is responsible for this peak and why is this ion the most abundant fragment?
Compound Z, CaHie0. Deduce its structure. IR: significant peaks at 2962 and 1718 (intense) cm. Mass...
Compound Z, CaHie0. Deduce its structure. IR: significant peaks at 2962 and 1718 (intense) cm. Mass spectrum: a few of the significant peaks include 128, 103, 57 m/z H-NMR: S,3H's aH's t,2t's PPM 13C-NMR 220 200 180 160 140 120 PPM 100 80 60 40 20
This is the mass spectrum of dichlorocyclohexylmethylsilane. Explain the relative intensity for peaks at m/e 196.0...
This is the mass spectrum of dichlorocyclohexylmethylsilane. Explain the relative intensity for peaks at m/e 196.0 (13.5), 197.0 (1.8), 198.0 (9.1),199.0 (1.1), 200.0 (1.7)and 201.0 (0.2) 1 00 - MS-IW-7601 C1 80 $i-CH3 60 40 mtt O 40 zO 60 140 160 180 200 100 1ZO m/z Relative Intensity
This is the mass spectrum of dichlorocyclohexylmethylsilane. Explain the relative intensity for peaks at m/e 196.0 (13.5), 197.0 (1.8), 198.0 (9.1),199.0 (1.1), 200.0 (1.7)and 201.0 (0.2) 1 00 - MS-IW-7601 C1...
parent ion at m/z 102 (M*), IR peaks at 1740 and 1150 cm 10. Propose a...
parent ion at m/z 102 (M*), IR peaks at 1740 and 1150 cm 10. Propose a structure for a molecule whose mass spectrum shows which gave the following 'H NMR spectrum.) 6 1 septet 2 5 0 6 PPM 11. Propose a structure for a molecule whose mass spectrum shows a parent ion at m/z 116 (M*) with at 1740 and 1150 cm1 which gave the following H NMR spectrum. base peak at m/z 43, IR peaks 6 1 2...
Please show all work and explanations if possible.
Thank you so much!
4. (4pts) A mass spectrum shows significant peaks at m/z 87, 115, and 143. Which of the following compounds is responsible for that mass spectrum: 4,7-dimethyl-1-octanol, 2,6-dimethyl-4-octanol, or 2,2,4-trimethyl-4-heptanol? Provide structures of the cationic fragments that support your choice and provide the mechanism for the formation of ONE of these fragments from the molecular ion. он он но
Deduce the ester compound structure with M/Z=136 on this mass
spectrum; significant peaks at 51, 77, 105, 136.
Relative Abundance M(136) 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 mz
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...
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:
9. Propose a structure for a molecule whose mass spectrum shows a parent ion at m/z 102 (M), IR peaks at 1740 and 1150 cm which gave the following 'H NMR spectrum.) 2 PPM
Problem 13.7 The base peak in the mass spectrum of 2,2,4-trimethylpentane [(CHa)3CCH2CHCH3)2l occurs at m/z 57. What ion is responsible for this peak and why is this ion the most abundant fragment?
Compound Z, CaHie0. Deduce its structure. IR: significant peaks at 2962 and 1718 (intense) cm. Mass spectrum: a few of the significant peaks include 128, 103, 57 m/z H-NMR: S,3H's aH's t,2t's PPM 13C-NMR 220 200 180 160 140 120 PPM 100 80 60 40 20
This is the mass spectrum of dichlorocyclohexylmethylsilane. Explain the relative intensity for peaks at m/e 196.0 (13.5), 197.0 (1.8), 198.0 (9.1),199.0 (1.1), 200.0 (1.7)and 201.0 (0.2) 1 00 - MS-IW-7601 C1 80 $i-CH3 60 40 mtt O 40 zO 60 140 160 180 200 100 1ZO m/z Relative Intensity
This is the mass spectrum of dichlorocyclohexylmethylsilane. Explain the relative intensity for peaks at m/e 196.0 (13.5), 197.0 (1.8), 198.0 (9.1),199.0 (1.1), 200.0 (1.7)and 201.0 (0.2) 1 00 - MS-IW-7601 C1...
parent ion at m/z 102 (M*), IR peaks at 1740 and 1150 cm 10. Propose a structure for a molecule whose mass spectrum shows which gave the following 'H NMR spectrum.) 6 1 septet 2 5 0 6 PPM 11. Propose a structure for a molecule whose mass spectrum shows a parent ion at m/z 116 (M*) with at 1740 and 1150 cm1 which gave the following H NMR spectrum. base peak at m/z 43, IR peaks 6 1 2...
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