Assume that the 1H NMR spectrum shown below was obtained on your isolated reaction product. Note...
Assume that the 1H NMR spectrum shown below was obtained on your isolated reaction product. Note that the frequency range of the original spectrum was -0.5 – 12 ppm, but the downfield range (~8.5 – 12 ppm) and upfield (< 4 ppm) were deleted in the printout because no signals were detected on those regions.
a) Draw the chemical structure of the B-hydroxyketone intermediate.
b) Is there any B-hydroxyketone contained in your reaction product? Why or why not? Refer to your drawn structure as necessary.
Homework Answers
Add Answer to:
Assume that the 1H NMR spectrum shown below was obtained on your
isolated reaction product. Note...
c) Using your answers to question 5 and 6a, what percent of the mixture obtained in...
c) Using your answers to question 5 and 6a, what percent of the
mixture obtained in reaction 1 is the ortho isomer?
d) What percent of the mixture obtained in reaction 1 is the
meta isomer?
e) What percent of the mixture obtained in reaction 1 is the
para isomer?
f) Could we have used Mass Spectrometry after the GC analysis
(GC-MS) to identify which peak on the GC was which isomer? Why or
why not?
g) Could we have...
1. Provide the structure of the compound illustrated in the below H-NMR spectrum. Label the sets...
1. Provide the structure of the compound illustrated in the
below H-NMR spectrum. Label the sets of unequivalent hydrogens in
your structure. The formula for the structure is
C6H10O2.
2. What is the complex splitting pattern for He?
3. Draw the complex splitting pattern for He and
label the coupling constants (J).
4. Why is He more downfield than He?
Include drawings to support your answer.
1н 1H 2H ЗН Зн PPM
2. The 13C NMR spectrum is shown below for the major product of the following reaction....
2. The 13C NMR spectrum is shown below for the major product of the following reaction. Draw the structure of this product. Note that there is an important peak at ca. 166 ppm and that the peak at ca. 40 ppm is due to a contaminant. excess KMnO4 H H. aq. NaOH 200 180 100 80 40 20 160 140 120 60
4. The H NMR spectrum shown below is for a compound with the formula CgHi9lN a)...
4. The H NMR spectrum shown below is for a compound with the formula CgHi9lN a) Determine the lOU for the compound b) Propose a structure for the compound c) Assign all H NMR signals to the hydrogens in your structure 6H 4H 4H 4H 1H
5. Using the GC mentioned in question 4 and the values listed on the chromatogram for...
5. Using the GC mentioned in question 4 and the values listed on the chromatogram for the height and width (at half height) of each peak, calculate the percent composition for each product (A, B and C). Be sure to show your work. (8 points) 6. The products corresponding to each peak on the GC are the ortho, meta, and para isomers of the nitrated product shown in the scheme for reaction 1. These isomers were isolated, and a proton...
An extract from a 'H-1H COSY spectrum is shown below. Use your understanding of NMR to...
An extract from a 'H-1H COSY spectrum is shown below. Use your understanding of NMR to identify which signals are coupled together and suggest which hydrogens of the proposed molecule the signals represent. You have to copy the 'H-'H COSY Extract in your answer booklet and indicate the signals that are coupled together in the copied scheme in the answer booklet. OH Proposed molecule Continuation of Question 3: 2PP in CDCI3 DOF-COSY Fitppm] o 302szos zo 's 20 1 5...
NEED HELP WITH B) C) D) E) F) and G) that apply to the spectra below....
NEED HELP WITH B) C) D) E) F) and G) that apply to the
spectra below.
OTHER ANSWERS ARE THERE TO SUPPLEMENT
Thank you!
5. Using the GC mentioned in question 4 and the values listed on
the chromatogram for the height and width (at half height) of each
peak, calculate the percent composition for each product (A, B and
C). Be sure to show your work.
Area of peak A = 125 x 8 =
1000mm2
Area of peak...
Given the Cosey, HSQC and HMBC experiments assign the 1H NMR spectrum and 13C NMR spectrum...
Given the Cosey, HSQC and HMBC experiments assign the
1H NMR spectrum and 13C NMR spectrum signals
of the compound. 1H peaks are labelled using lowercase
letters and 13C peaks using uppercase. Be aware that the
letters of the same peak does not necessarily refer to the position
in the molecule. For example, peak a in the 1H and peak
A in the 13C NMR are not necessarily assigned to the
same number atom. The assignment of protons 4 and...
3. (a) From the spectral data (1H, 13C NMR, IR, MS) you were given, identify the...
3. (a)
From the spectral data (1H, 13C NMR, IR, MS) you were given,
identify the structure of your product. Explain why you chose your
particular product based on the spectroscopic data.
(b)
Fully assign the 1H NMR spectrum of your product (i.e. determine
which peaks in the 1H NMR correspond to which hydrogens in the
product)
(c) Now
work backwards (or consult the NMR spectra of the two reactants)
and determine the structure of the two unknown reactants.
Thank...
Evaluate and investigate the following IR Spectrum and 1H NMR Spectrum. Identify the most important peaks and correlate the results as much as you can from the obtained product in the multi-step synth...
Evaluate and investigate the
following IR Spectrum and 1H
NMR Spectrum. Identify the most important
peaks and correlate the results as much
as you can from the obtained product in the multi-step
synthesis of ethyl acetoacetate. This is Product
C from this multi-step synthesis where Product
B was identified as in the figure below and as such,
identify what product can be obtained after the synthesis
from the spectra provided. Use the template below in analysing the
spectra.
Figure 1...
c) Using your answers to question 5 and 6a, what percent of the
mixture obtained in reaction 1 is the ortho isomer?
d) What percent of the mixture obtained in reaction 1 is the
meta isomer?
e) What percent of the mixture obtained in reaction 1 is the
para isomer?
f) Could we have used Mass Spectrometry after the GC analysis
(GC-MS) to identify which peak on the GC was which isomer? Why or
why not?
g) Could we have...
1. Provide the structure of the compound illustrated in the
below H-NMR spectrum. Label the sets of unequivalent hydrogens in
your structure. The formula for the structure is
C6H10O2.
2. What is the complex splitting pattern for He?
3. Draw the complex splitting pattern for He and
label the coupling constants (J).
4. Why is He more downfield than He?
Include drawings to support your answer.
1н 1H 2H ЗН Зн PPM
2. The 13C NMR spectrum is shown below for the major product of the following reaction. Draw the structure of this product. Note that there is an important peak at ca. 166 ppm and that the peak at ca. 40 ppm is due to a contaminant. excess KMnO4 H H. aq. NaOH 200 180 100 80 40 20 160 140 120 60
4. The H NMR spectrum shown below is for a compound with the formula CgHi9lN a) Determine the lOU for the compound b) Propose a structure for the compound c) Assign all H NMR signals to the hydrogens in your structure 6H 4H 4H 4H 1H
5. Using the GC mentioned in question 4 and the values listed on the chromatogram for the height and width (at half height) of each peak, calculate the percent composition for each product (A, B and C). Be sure to show your work. (8 points) 6. The products corresponding to each peak on the GC are the ortho, meta, and para isomers of the nitrated product shown in the scheme for reaction 1. These isomers were isolated, and a proton...
An extract from a 'H-1H COSY spectrum is shown below. Use your understanding of NMR to identify which signals are coupled together and suggest which hydrogens of the proposed molecule the signals represent. You have to copy the 'H-'H COSY Extract in your answer booklet and indicate the signals that are coupled together in the copied scheme in the answer booklet. OH Proposed molecule Continuation of Question 3: 2PP in CDCI3 DOF-COSY Fitppm] o 302szos zo 's 20 1 5...
NEED HELP WITH B) C) D) E) F) and G) that apply to the
spectra below.
OTHER ANSWERS ARE THERE TO SUPPLEMENT
Thank you!
5. Using the GC mentioned in question 4 and the values listed on
the chromatogram for the height and width (at half height) of each
peak, calculate the percent composition for each product (A, B and
C). Be sure to show your work.
Area of peak A = 125 x 8 =
1000mm2
Area of peak...
Given the Cosey, HSQC and HMBC experiments assign the
1H NMR spectrum and 13C NMR spectrum signals
of the compound. 1H peaks are labelled using lowercase
letters and 13C peaks using uppercase. Be aware that the
letters of the same peak does not necessarily refer to the position
in the molecule. For example, peak a in the 1H and peak
A in the 13C NMR are not necessarily assigned to the
same number atom. The assignment of protons 4 and...
3. (a)
From the spectral data (1H, 13C NMR, IR, MS) you were given,
identify the structure of your product. Explain why you chose your
particular product based on the spectroscopic data.
(b)
Fully assign the 1H NMR spectrum of your product (i.e. determine
which peaks in the 1H NMR correspond to which hydrogens in the
product)
(c) Now
work backwards (or consult the NMR spectra of the two reactants)
and determine the structure of the two unknown reactants.
Thank...
Evaluate and investigate the
following IR Spectrum and 1H
NMR Spectrum. Identify the most important
peaks and correlate the results as much
as you can from the obtained product in the multi-step
synthesis of ethyl acetoacetate. This is Product
C from this multi-step synthesis where Product
B was identified as in the figure below and as such,
identify what product can be obtained after the synthesis
from the spectra provided. Use the template below in analysing the
spectra.
Figure 1...
Most questions answered within 3 hours.
-
A space vehicle is coasting at a constant velocity of 18.1 m/s
in the +y direction...
asked 58 minutes ago -
5) Use the following balanced equation to answer questions
(a)-(i).
3 Cu(s) + 8 HNO3(aq) →...
asked 40 minutes ago -
A three-year maturity bond with a 12% annual coupon rate is
currently traded at par $1000...
asked 49 minutes ago -
1.
What is the minimum volume to use in the Spec 20 cuvette in order
to...
asked 1 hour ago -
A builder wants to install wall-to-wall carpeting in a living
room of length 8.87 m and...
asked 1 hour ago -
Organizational change can produce anxiety in those affected by
the change. In what ways can change...
asked 1 hour ago -
Ozone in the atmosphere may react with nitric oxide.
From the following data, calculate the DG...
asked 1 hour ago -
Steven Long, a bond analyst, is analyzing a convertible bond.
The characteristics of the bond are...
asked 1 hour ago -
Michael Bordellet is
the owner/pilot of Stellar Air Service. The company flies a daily
round trip...
asked 1 hour ago -
Hi, I need to change the conversion where stack is into a class
stack and add...
asked 1 hour ago -
Consider the log logistic CDF F(t)=1/(1+(t/α)-β)
Find f(t), S(t), h(t), and H(t).
It can be shown...
asked 1 hour ago -
A gaseous mixture of methane and water vapor at
atmospheric pressure and 500 ° C is...
asked 1 hour ago