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Can
you correspond each of the peaks to the protons in
4-methoxy-4-methyl chalcone?
4.0 3.00 -7.530...
Can you correspond each of the peaks to the protons in one of the following molecules?...
Can
you correspond each of the peaks to the protons in one of the
following molecules? Also, does the spectrum correspond to the Z or
E alkene?
We were unable to transcribe this imageWe were unable to transcribe this image3.5 3.0 2.0 1.5 Ppa 3.00 ISO'S 7.230 0669 7.8 7.6 7.4 7.2 7.0 6.8 6.6 6.4 6.2 ppm
Correspond each of the peaks to the H's in the structure. Is it the Z or...
Correspond each of the peaks to the H's in the structure. Is it the
Z or E isomer? Show how you know.
1H NMR (CDCI, 300 MHz) 9-(2-phenylethenyl)anthracene 7.9424 - 7.8874 - 6.9760 6.9207 1H 7.0 8.6 8.4 8.2 8.0 7.8 7.6 7.4 7.2 6.8 6.6
In the proton NMR for benzil, there are clearly some impurity peaks below 8 ppm. Although...
In the proton NMR for benzil, there are clearly some impurity
peaks below 8 ppm. Although we cannot assign these for certain, is
it possible that these peaks come from unreacted benzoin? Why or
why not?
8.0 8.3 7.5 8.2 NMR nuclei observed: H Solvent: CDCl3 NMR field strength: 400MHz 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 (ppm) f1 8.1 8.0 7.9 7.8 7.7 7.6 7.5 7.4 7.3 f1 (ppm) 11 10 12 13 14 2.0 1.5...
An aldol condensation reaction was performed where benzaldehyde and cyclopentanone were used. The product is 2,5...
An aldol condensation reaction was performed where benzaldehyde
and cyclopentanone were used. The product is 2,5
dibenzylidenecyclopentanone or just 2-benzylidenecyclopentanone.
The spectra correspond with the aldehyde being benzaldehyde but the
ketone used could either be acetone, cyclopentanone or cyclohexane.
I need to find the NMR spectra that correspond to cyclopentanone
being the ketone in the aldol condensation. Which NMR spectra
correspond to the correct product?
I think the second set is with cyclohexanone and not
cyclopentanone but I could be...
Write down problem number. Provide formula, HDI value, and a complete, chemically correct structure for each...
Write down problem number.
Provide formula, HDI value, and a complete, chemically correct
structure for each problem.
Assign signals in the 1H and 13C spectra to specific atoms,
identify structural units and/or functional groups.
Example:
Problem # 3
Formula: C8H8O2
HDI: 5
1H NMR: p-substituted Ar at 7.27-7.97 ppm, benzylic CH3 group at
2.42 ppm, COOH proton at 12.9 ppm
13C NMR: carbonyl C at 167.8 ppm (ester or acid), benzylic CH3
at 21.40 ppm, 4 remaining signals are Ar...
Match the peaks labeled A,B,C,D,E to the Diels-Adler product and what part of the products structure...
Match the peaks labeled A,B,C,D,E to the Diels-Adler
product and what part of the products structure creates each peak
on the NMR graph.
3.60 3.58 3.56 3.54 3.52 f1 (ppm) 3.50 3.48 3.46 C (dd) 7.34 7.45 7.40 7.35 7.30 7.25 i (ppm) 7,20 7.15 7.10 B (dd) A (dt) 7.39 7.20 D (t) 4.83 E (dd) 3.53 T T 1.98 1.93 4.00 2.09 2.01 .8 7.6 7.4 7.2 7.0 6.8 6.6 6.4 6.2 6.0 5.8 5.6 5.4 f1 (ppm)...
Examine H NMR 4. Examine the attached 'H NMR spectrum of the product from the trans-cinnamic...
Examine H NMR
4. Examine the attached 'H NMR spectrum of the product from the trans-cinnamic acid + Br (dibromide product) reaction in the lab manual. Indicate which part(s) of the dibromide product give rise to the peaks at 5 and 5.5 ppm. OS SOIT -1093.75 SEZO- ES OEDI- H Ả Br 0 " H OH Bri dibromide product 1H NMR (Note the OH is not shown) 6 84 8.2 8.0 7.8 7.6 74 7.2 70 69 6.6 6.4 6.2...
Questions Using the spectrum attached to this procedure, assign the peaks in the 'H NMR spectrum...
Questions Using the spectrum attached to this procedure, assign the peaks in the 'H NMR spectrum for 3.4-methylenedioxynitrostyrene. Using coupling constants, describe the geometry of the double bond. You should tear out the labeled proton spectrum and turn it in with your notebook pages. Account for the unusual acidity of nitromethane whose pK, is 10. 1) CH3NO2, NaOH 2) HCI, H2O piperonal Mol. Wt.: 150.13 3,4-methylenedioxynitrostyrene Mol. Wt.: 193.16 —3177.4 - 3163.9 -2995.7 -2982.2 -2904.9 2838.0 2836.4 2030.0 2828.3 2801.0...
Identify products peaks A-D in Diels-Alder reaction where we used Anthracene and Maleic anhydride to produce...
Identify products peaks A-D in Diels-Alder reaction where we
used Anthracene and Maleic anhydride to produce Diels-Alder Product
7.41 7.40 7.26 odds 7.34 1-7.34 7.33 1.7.22 7.21 -7.21 17.20 17.20 17.18 6621 17.39 SE2 44.83 14.83 SRB 3.60 3.58 3.56 3.50 3.48 3.46 C (dd) 7.45 7.40 735 3.54 3.52 11 (ppm) 730 725 11 ppm) 720 7.15 7.10 B (da) A (dt) 7.397.20 E dd) 3.53 1.98 1,93 4.00 2.01 6.6 6.4 6.2 6.0 5.8 5.6 5.4 5.2 5.0...
Label peaks and determine the structure of the aldehyde in the 1H NMR and 13C1H NMR:...
Label peaks and determine the structure of the
aldehyde in the 1H NMR and 13C1H NMR:
pg 1H NMR of product from aldehyde Yin CDCI3 CHCI ppm Hz Intensity 17.73 3091.6 621.6 2 7.69 3075.7 690.3 3 7.59 3036.2 1108.5 4 7.57 3027.5 1199.0 5 6.98 2793.9 961.0 6 6.95 2779.9 1320.9 76.94 2778.0 1279.1 8 6.93 2771.1 1185.2 7.60 7.55 7.50 7.45 7.40 7.35 7.30 7.25 fl (ppm) 7.20 7.15 7.10 7.057.00 6.95 6.90 OK to group CHCl3 -...
Can
you correspond each of the peaks to the protons in one of the
following molecules? Also, does the spectrum correspond to the Z or
E alkene?
We were unable to transcribe this imageWe were unable to transcribe this image3.5 3.0 2.0 1.5 Ppa 3.00 ISO'S 7.230 0669 7.8 7.6 7.4 7.2 7.0 6.8 6.6 6.4 6.2 ppm
Correspond each of the peaks to the H's in the structure. Is it the
Z or E isomer? Show how you know.
1H NMR (CDCI, 300 MHz) 9-(2-phenylethenyl)anthracene 7.9424 - 7.8874 - 6.9760 6.9207 1H 7.0 8.6 8.4 8.2 8.0 7.8 7.6 7.4 7.2 6.8 6.6
In the proton NMR for benzil, there are clearly some impurity
peaks below 8 ppm. Although we cannot assign these for certain, is
it possible that these peaks come from unreacted benzoin? Why or
why not?
8.0 8.3 7.5 8.2 NMR nuclei observed: H Solvent: CDCl3 NMR field strength: 400MHz 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 (ppm) f1 8.1 8.0 7.9 7.8 7.7 7.6 7.5 7.4 7.3 f1 (ppm) 11 10 12 13 14 2.0 1.5...
An aldol condensation reaction was performed where benzaldehyde
and cyclopentanone were used. The product is 2,5
dibenzylidenecyclopentanone or just 2-benzylidenecyclopentanone.
The spectra correspond with the aldehyde being benzaldehyde but the
ketone used could either be acetone, cyclopentanone or cyclohexane.
I need to find the NMR spectra that correspond to cyclopentanone
being the ketone in the aldol condensation. Which NMR spectra
correspond to the correct product?
I think the second set is with cyclohexanone and not
cyclopentanone but I could be...
Write down problem number.
Provide formula, HDI value, and a complete, chemically correct
structure for each problem.
Assign signals in the 1H and 13C spectra to specific atoms,
identify structural units and/or functional groups.
Example:
Problem # 3
Formula: C8H8O2
HDI: 5
1H NMR: p-substituted Ar at 7.27-7.97 ppm, benzylic CH3 group at
2.42 ppm, COOH proton at 12.9 ppm
13C NMR: carbonyl C at 167.8 ppm (ester or acid), benzylic CH3
at 21.40 ppm, 4 remaining signals are Ar...
Match the peaks labeled A,B,C,D,E to the Diels-Adler
product and what part of the products structure creates each peak
on the NMR graph.
3.60 3.58 3.56 3.54 3.52 f1 (ppm) 3.50 3.48 3.46 C (dd) 7.34 7.45 7.40 7.35 7.30 7.25 i (ppm) 7,20 7.15 7.10 B (dd) A (dt) 7.39 7.20 D (t) 4.83 E (dd) 3.53 T T 1.98 1.93 4.00 2.09 2.01 .8 7.6 7.4 7.2 7.0 6.8 6.6 6.4 6.2 6.0 5.8 5.6 5.4 f1 (ppm)...
Examine H NMR
4. Examine the attached 'H NMR spectrum of the product from the trans-cinnamic acid + Br (dibromide product) reaction in the lab manual. Indicate which part(s) of the dibromide product give rise to the peaks at 5 and 5.5 ppm. OS SOIT -1093.75 SEZO- ES OEDI- H Ả Br 0 " H OH Bri dibromide product 1H NMR (Note the OH is not shown) 6 84 8.2 8.0 7.8 7.6 74 7.2 70 69 6.6 6.4 6.2...
Questions Using the spectrum attached to this procedure, assign the peaks in the 'H NMR spectrum for 3.4-methylenedioxynitrostyrene. Using coupling constants, describe the geometry of the double bond. You should tear out the labeled proton spectrum and turn it in with your notebook pages. Account for the unusual acidity of nitromethane whose pK, is 10. 1) CH3NO2, NaOH 2) HCI, H2O piperonal Mol. Wt.: 150.13 3,4-methylenedioxynitrostyrene Mol. Wt.: 193.16 —3177.4 - 3163.9 -2995.7 -2982.2 -2904.9 2838.0 2836.4 2030.0 2828.3 2801.0...
Identify products peaks A-D in Diels-Alder reaction where we
used Anthracene and Maleic anhydride to produce Diels-Alder Product
7.41 7.40 7.26 odds 7.34 1-7.34 7.33 1.7.22 7.21 -7.21 17.20 17.20 17.18 6621 17.39 SE2 44.83 14.83 SRB 3.60 3.58 3.56 3.50 3.48 3.46 C (dd) 7.45 7.40 735 3.54 3.52 11 (ppm) 730 725 11 ppm) 720 7.15 7.10 B (da) A (dt) 7.397.20 E dd) 3.53 1.98 1,93 4.00 2.01 6.6 6.4 6.2 6.0 5.8 5.6 5.4 5.2 5.0...
Label peaks and determine the structure of the
aldehyde in the 1H NMR and 13C1H NMR:
pg 1H NMR of product from aldehyde Yin CDCI3 CHCI ppm Hz Intensity 17.73 3091.6 621.6 2 7.69 3075.7 690.3 3 7.59 3036.2 1108.5 4 7.57 3027.5 1199.0 5 6.98 2793.9 961.0 6 6.95 2779.9 1320.9 76.94 2778.0 1279.1 8 6.93 2771.1 1185.2 7.60 7.55 7.50 7.45 7.40 7.35 7.30 7.25 fl (ppm) 7.20 7.15 7.10 7.057.00 6.95 6.90 OK to group CHCl3 -...
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