Note especially the strong peak at 1715 cm^-1 in the IR. Assign structures to the fragment...
Note especially the strong peak at 1715 cm^-1 in the IR. Assign
structures to the fragment ion peaks at m/e 85,
m/e 57, and m/e 43.
Homework Answers
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Note especially the strong peak at 1715 cm^-1 in the IR. Assign
structures to the fragment...
1. Assign structures for the following molecules given the IR and EI-MS data below: (a) IR...
1. Assign structures for the following molecules given the IR and EI-MS data below: (a) IR shows medium intensity peak at 1650 cm and C-H out-of-plane bending at 880 cm. 56 Relative Abundance M(84) uli 35 40 45 dll 25 30 LL 15 20 . Inlll 50 55 miz 60 65 70 75 80 85 90 (b) IR has a broad peak at 3370 cm and a strong peak at 1159 cm!. The M ion is absent. Relative Abundance (percent)...
7. Propose structures for compounds that meet the following descriptions. Note all wavenumbers are approximate. a....
7. Propose structures for compounds that meet the following descriptions. Note all wavenumbers are approximate. a. CrH16, an optically active compound with the main IR absorption at approximately 3000 cm - 1 peak at 3100 cm b. CsHioO, with a strong IR absorption at 3200-3400 cm and no c. C4H4O3, with two strong IR absorptions at approximately 1715 cm1 and 1803 cm 1 and 3300 cm d. CsH6, with IR absorptions at 1800-2000 cm1, 3100 cm1, 2150 cm
assign structures for the following molecules given IR and EI-MS data below: (c) Contains oxygen. IR...
assign structures for the following molecules given IR and
EI-MS data below:
(c) Contains oxygen. IR shows no significant bands above 3000 cm! Relative Abundance M(102) is 2015 30 35 40 45 50 55 60s 70 's 80 es 100 165 (d) IR shows strong peak near 1725 cm! Relative Abundance 1 3 5 llllll 40 45 m/z 50 55 60
References) Give one fragment in the mass spectrum and one peak in the IR spectrum that...
References) Give one fragment in the mass spectrum and one peak in the IR spectrum that could be used to distinguish between these two isomers: CH3 HаC a. HаС b. "CHз CH3 4-methylpentan-2-one 3-methylpentanal (Designate which compound will show that diagnostic fragment or peak by preceding the value with the letter of the compound, ie. "a47" or "b1730". Do not include any units.) Mass spectrum: IR spectrum Characteristic IR Absorptions of Some Functional Groups Absorption (cm) Functional Group Absorption (cm...
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
Give one fragment in the mass spectrum and one peak in the IR spectrum that could...
Give one fragment in the mass spectrum and one peak in the IR
spectrum that could be used to distinguish between these two
isomers:
Give one fragment in the mass spectrum and one peak in the IR spectrum that could be used to distinguish between these two isomers: CH O CH (O H3C H3C H3C CH 3,3-dimethylbutanal 4-methylpentan-2-one (Designate which compound will show that diagnostic fragment or peak by preceding the value with the letter of the compound, i.e. "a47"...
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...
For mass spectrum: label M+, base peak, 2 fragment ions. draw structures for these ions. For IR: ...
For mass spectrum: label M+, base peak, 2 fragment ions. draw
structures for these ions.
For
IR: name all of the functional groups present, label peaks, list
chemical shifts/integration/splitting pattern
10 Largest Peaks 43 9991 41 445 55 261 29 239 285 232842 113 51 291 55 2611 72 51 1 150 13 56 17 81 8 152 13I 1880 1 30280 i 27251 i 421131 405 28 Masses and Abundances 14 151 27 251 1s asi 28 53 39...
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...
Determine the molecular structure based of the proton nmr's. 9) Chemical Formula: CsH1002 IR: strong peak...
Determine the molecular structure based of the proton nmr's.
9) Chemical Formula: CsH1002 IR: strong peak at 1750cm-1 ЗН 6H PPM 10) Chemical Formula: C12H16 (hard to see but all peaks that integrate to 1H are doublet of doublets) IR: peak at 1650cm-1 9H 2H 2H IH IH co PPM
1. Assign structures for the following molecules given the IR and EI-MS data below: (a) IR shows medium intensity peak at 1650 cm and C-H out-of-plane bending at 880 cm. 56 Relative Abundance M(84) uli 35 40 45 dll 25 30 LL 15 20 . Inlll 50 55 miz 60 65 70 75 80 85 90 (b) IR has a broad peak at 3370 cm and a strong peak at 1159 cm!. The M ion is absent. Relative Abundance (percent)...
7. Propose structures for compounds that meet the following descriptions. Note all wavenumbers are approximate. a. CrH16, an optically active compound with the main IR absorption at approximately 3000 cm - 1 peak at 3100 cm b. CsHioO, with a strong IR absorption at 3200-3400 cm and no c. C4H4O3, with two strong IR absorptions at approximately 1715 cm1 and 1803 cm 1 and 3300 cm d. CsH6, with IR absorptions at 1800-2000 cm1, 3100 cm1, 2150 cm
assign structures for the following molecules given IR and
EI-MS data below:
(c) Contains oxygen. IR shows no significant bands above 3000 cm! Relative Abundance M(102) is 2015 30 35 40 45 50 55 60s 70 's 80 es 100 165 (d) IR shows strong peak near 1725 cm! Relative Abundance 1 3 5 llllll 40 45 m/z 50 55 60
References) Give one fragment in the mass spectrum and one peak in the IR spectrum that could be used to distinguish between these two isomers: CH3 HаC a. HаС b. "CHз CH3 4-methylpentan-2-one 3-methylpentanal (Designate which compound will show that diagnostic fragment or peak by preceding the value with the letter of the compound, ie. "a47" or "b1730". Do not include any units.) Mass spectrum: IR spectrum Characteristic IR Absorptions of Some Functional Groups Absorption (cm) Functional Group Absorption (cm...
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
Give one fragment in the mass spectrum and one peak in the IR
spectrum that could be used to distinguish between these two
isomers:
Give one fragment in the mass spectrum and one peak in the IR spectrum that could be used to distinguish between these two isomers: CH O CH (O H3C H3C H3C CH 3,3-dimethylbutanal 4-methylpentan-2-one (Designate which compound will show that diagnostic fragment or peak by preceding the value with the letter of the compound, i.e. "a47"...
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...
For mass spectrum: label M+, base peak, 2 fragment ions. draw
structures for these ions.
For
IR: name all of the functional groups present, label peaks, list
chemical shifts/integration/splitting pattern
10 Largest Peaks 43 9991 41 445 55 261 29 239 285 232842 113 51 291 55 2611 72 51 1 150 13 56 17 81 8 152 13I 1880 1 30280 i 27251 i 421131 405 28 Masses and Abundances 14 151 27 251 1s asi 28 53 39...
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...
Determine the molecular structure based of the proton nmr's.
9) Chemical Formula: CsH1002 IR: strong peak at 1750cm-1 ЗН 6H PPM 10) Chemical Formula: C12H16 (hard to see but all peaks that integrate to 1H are doublet of doublets) IR: peak at 1650cm-1 9H 2H 2H IH IH co PPM
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