Homework Answers
The peak around 3.10 is for C-H is attached to the carbon containing the OH group because it's showing doublet of triplet pattern and is for the trans isomer since the coupling constant i.e J value is more, whereas peak around 3.78 ppm is for that same hydrogen but for cis isomer since it has lesser coupling constant ( J value) and thus pattern is not clear and looks clumpsy.
NOTE: The picture is not clear so I cannot see the values clearly and hence cannot give the J-values and peak values precisely.
Add Answer to:
LABORATORY 9 SODIUM BOROHYDRIDE REDUCTION OF A CHIRAL KETONE FIGURE 9.8 'H NMR spectrum of a...
Based on the NMR spectrum in Figure 16-32, can Unknown 1 be CH3CH2CH2CO2C6H5 or CH3CH2OCH2(CwO)C6H5? Why...
Based on the NMR spectrum in Figure 16-32, can Unknown 1 be
CH3CH2CH2CO2C6H5 or CH3CH2OCH2(CwO)C6H5? Why or why not?
With this in mind, suppose you are given the 'H NMR spectrum in Figure 16-32, which is generated from a compound (Unknown 1) having the formula C10H1202 To answer question 1, the spectrum appears to have at least four signals: one at 1.1 ppm, one at 8 = 1.8 ppm, one at 8 = 4.2 ppm, and a set of signals...
1. The cyclopropyl derivative hs the H NMR spectrum (300 MHz in CDCs, with TMS) is...
1. The cyclopropyl derivative hs the H NMR spectrum (300 MHz in CDCs, with TMS) is shown below, along with expanded resonances at the following 4.6, 3.7, 3.4, 3.2, 2.8, and 2.6 ppm chemical shifts. CI CI 0 pom 4 ppm 7 ppm 3.4 ppm 2& pm 28 pom a. Assign the resonances at 4.6, 3.7, 3.4, 3.2, 2.8, and 2.6 ppm to the various protons in the molecule, by writing the chemical shift next to the protons on the...
The signals in the 1H NMR spectrum of butanoic acid are labelled from A to D....
The signals in the 1H NMR spectrum of butanoic acid are labelled from A to D. Considering the spectrum, answer the questions below: [4 marks] Complete the table: Signal Chemical shift, δ (ppm) Splitting pattern (singlet, doublet, triplet, quartet, pentet, sixtet, septet, octet, nonet, multiplet) # of H neighbours Integration (# of protons) Circle or highlight the proton(s) that give rise to this signal A 11.60 CH3CH2CH2COOH B 2.35 CH3CH2CH2COOH C 1.68 CH3CH2CH2COOH D 0.98 CH3CH2CH2COOH [2 marks] Compare this...
4. Consider the following two diastercomers: Both compounds generate 'H NMR spectra with the following signals:...
4. Consider the following two diastercomers: Both compounds generate 'H NMR spectra with the following signals: A multiplet between 7.20-7.63 ppm with an integration of 5H Two separate doublets between 5.70-6.50 ppm, each with an integration of 1H A singlet around 1.30 ppm with an integration of 9H Despite the similarities, how could you differentiate between the H NMR spectra of these isomers? 5. Assign each set of protons to their appropriate signals in the 'H NMR spectrum shown below....
for the following 2 compounds, please calculate, and show the calculations for, the degree of unsaturation, assign the IR spectrum peaks, assign the 13C NMR peaks, assign the 1H NMR peaks, and draw th...
for the following 2 compounds, please calculate, and
show the calculations for, the degree of unsaturation, assign the
IR spectrum peaks, assign the 13C NMR peaks, assign the 1H NMR
peaks, and draw the structure for the unknown compound.
CHIM 245 Spectroscopy Problem Set #2 In this problem set there are two unknown compounds. You are provided with the formula, IR spectrum, "C NMR spectrum, and 'H NMR spectrum for each compound. Each unknown is worth 10 points, with an...
The H-NMR spectrum of an unknown compound (formula CaHgO2) is shown below. Draw the structure of...
The H-NMR spectrum of an unknown compound (formula CaHgO2) is shown below. Draw the structure of the unknown compound. Question 5 4 1 6 5 8 10 11 Ppm The 13C-NMR spectrum of an unknown compound (formula CgH180) is shown below. Its 1H-NMR spectrum only shows one singlet at 1.2 ppm. Draw the structure of this unknown compound. uestion 2 220 200 160 140 120 PPM 100 80 240 180 60 40 20 Create OscerSketch Answer 2 What would be...
TReferences [Review Topics] Draw the structure of the compound C,H,O, from its proton ("H) NMR spectrum...
TReferences [Review Topics] Draw the structure of the compound C,H,O, from its proton ("H) NMR spectrum below. First-order spin-upin splitting rules and equal coupling constants can be assumed. (Detailed analysis of any non-first order portions of the spectrum will not be required.) Integral ratios to the nearest whole number are (left to right) 1:5:1:3. Flash Installation and Troubleshooting Used with permission from Aldrich Chemical Co., Inc. Solvent CDC *5Y ZOOM MEASURE 104 83 63 Chemical shift, (ppm) 21 (Use your...
Please fully answer all parts of the question. 5. (10 points) Analysis of 'H NMR spectrum....
Please fully answer all parts of the question.
5. (10 points) Analysis of 'H NMR spectrum. Below is the 'H NMR spectrum of the product from this week's experiment. 3H, t, J = 7.1 Hz 1H, d, J= 15.8 Hz 2H, q, J = 7.1 Hz 5H, m 1H, d, J= 15.8 Hz. TT 2 1 10 9 8 7 6 5 4 3 1 ppm Summary of peaks (ppm): 1.32 (3H, t, J = 7.1 Hz), 4.24 (2H, q,...
6. The following is a 'H-NMR spectrum for compound BB with the molecular formula CyH1402. Which...
6. The following is a 'H-NMR spectrum for compound BB with the molecular formula CyH1402. Which structure matches the 'H-NMR spectrum? (300 MHZ.CDC) doublet CH,40, Compound BB triplet triplet 24 2.1 multiple - sexdat Chemical Shift (6) 0 = 7. What is the relationship between these two molecules? ОН and HO a) Same molecule b) Enantiomers c) Diasteromers d) Constitutional Isomers 8. The R-enantiomer rotates light clockwise +20º and the Senantiomer rotates light counterclockwise -20°. If a mixture of the...
QUESTIONS HO — а Hab The 'H-NMR of the product shows two doublets in the aromatic...
QUESTIONS HO — а Hab The 'H-NMR of the product shows two doublets in the aromatic region (at ~7.8 ppm and 6.7 ppm with equal relative integration) H. and a very broad signal (the signal is almost flat from ~5.0 ppm to ~6.5 ppm and may actually extend into the doublet at ~ 6.7 ppm) which may indicate a "combination" of the amine and acid peaks. W h o o Hd The amine group can be considered to be electron...
Based on the NMR spectrum in Figure 16-32, can Unknown 1 be
CH3CH2CH2CO2C6H5 or CH3CH2OCH2(CwO)C6H5? Why or why not?
With this in mind, suppose you are given the 'H NMR spectrum in Figure 16-32, which is generated from a compound (Unknown 1) having the formula C10H1202 To answer question 1, the spectrum appears to have at least four signals: one at 1.1 ppm, one at 8 = 1.8 ppm, one at 8 = 4.2 ppm, and a set of signals...
1. The cyclopropyl derivative hs the H NMR spectrum (300 MHz in CDCs, with TMS) is shown below, along with expanded resonances at the following 4.6, 3.7, 3.4, 3.2, 2.8, and 2.6 ppm chemical shifts. CI CI 0 pom 4 ppm 7 ppm 3.4 ppm 2& pm 28 pom a. Assign the resonances at 4.6, 3.7, 3.4, 3.2, 2.8, and 2.6 ppm to the various protons in the molecule, by writing the chemical shift next to the protons on the...
4. Consider the following two diastercomers: Both compounds generate 'H NMR spectra with the following signals: A multiplet between 7.20-7.63 ppm with an integration of 5H Two separate doublets between 5.70-6.50 ppm, each with an integration of 1H A singlet around 1.30 ppm with an integration of 9H Despite the similarities, how could you differentiate between the H NMR spectra of these isomers? 5. Assign each set of protons to their appropriate signals in the 'H NMR spectrum shown below....
for the following 2 compounds, please calculate, and
show the calculations for, the degree of unsaturation, assign the
IR spectrum peaks, assign the 13C NMR peaks, assign the 1H NMR
peaks, and draw the structure for the unknown compound.
CHIM 245 Spectroscopy Problem Set #2 In this problem set there are two unknown compounds. You are provided with the formula, IR spectrum, "C NMR spectrum, and 'H NMR spectrum for each compound. Each unknown is worth 10 points, with an...
The H-NMR spectrum of an unknown compound (formula CaHgO2) is shown below. Draw the structure of the unknown compound. Question 5 4 1 6 5 8 10 11 Ppm The 13C-NMR spectrum of an unknown compound (formula CgH180) is shown below. Its 1H-NMR spectrum only shows one singlet at 1.2 ppm. Draw the structure of this unknown compound. uestion 2 220 200 160 140 120 PPM 100 80 240 180 60 40 20 Create OscerSketch Answer 2 What would be...
TReferences [Review Topics] Draw the structure of the compound C,H,O, from its proton ("H) NMR spectrum below. First-order spin-upin splitting rules and equal coupling constants can be assumed. (Detailed analysis of any non-first order portions of the spectrum will not be required.) Integral ratios to the nearest whole number are (left to right) 1:5:1:3. Flash Installation and Troubleshooting Used with permission from Aldrich Chemical Co., Inc. Solvent CDC *5Y ZOOM MEASURE 104 83 63 Chemical shift, (ppm) 21 (Use your...
Please fully answer all parts of the question.
5. (10 points) Analysis of 'H NMR spectrum. Below is the 'H NMR spectrum of the product from this week's experiment. 3H, t, J = 7.1 Hz 1H, d, J= 15.8 Hz 2H, q, J = 7.1 Hz 5H, m 1H, d, J= 15.8 Hz. TT 2 1 10 9 8 7 6 5 4 3 1 ppm Summary of peaks (ppm): 1.32 (3H, t, J = 7.1 Hz), 4.24 (2H, q,...
6. The following is a 'H-NMR spectrum for compound BB with the molecular formula CyH1402. Which structure matches the 'H-NMR spectrum? (300 MHZ.CDC) doublet CH,40, Compound BB triplet triplet 24 2.1 multiple - sexdat Chemical Shift (6) 0 = 7. What is the relationship between these two molecules? ОН and HO a) Same molecule b) Enantiomers c) Diasteromers d) Constitutional Isomers 8. The R-enantiomer rotates light clockwise +20º and the Senantiomer rotates light counterclockwise -20°. If a mixture of the...
QUESTIONS HO — а Hab The 'H-NMR of the product shows two doublets in the aromatic region (at ~7.8 ppm and 6.7 ppm with equal relative integration) H. and a very broad signal (the signal is almost flat from ~5.0 ppm to ~6.5 ppm and may actually extend into the doublet at ~ 6.7 ppm) which may indicate a "combination" of the amine and acid peaks. W h o o Hd The amine group can be considered to be electron...
Most questions answered within 3 hours.
-
By applying what you know about Grignard reagents and the
mechanism by which benzoic acid is...
asked 11 minutes ago -
For thermoplastics, explain the effects of increasing of each of
the following properties on a polymer’s...
asked 12 minutes ago -
Make a menu for the user to use in python 3 that can search and
replace...
asked 2 minutes ago -
1) An aqueous solution contains 0.280 M
NaHS and 0.128 M
H2S.
The pH of this...
asked 18 minutes ago -
Situational Leadership
is based on interplay of all of the following except:
The amount of guidance...
asked 18 minutes ago -
Consider the following problem: given n positive integers,
separate them into two groups such that adding...
asked 22 minutes ago -
Briefly discuss the following statements:
2.1 A partner never has the right to claim compensation for...
asked 24 minutes ago -
If a bond has an annual probability of default of 6%, 10% and
12% in years...
asked 33 minutes ago -
Let X be normally distributed with mean μ = 10 and standard
deviation σ = 6....
asked 38 minutes ago -
You're examining some of the tiny printing on one of the newer
twenty-dollar bills. A 1.5...
asked 43 minutes ago -
Discuss several common sources of secondary data coming from
government sources.
asked 45 minutes ago -
This is a basic java program where you convert units using only
loops, control statements and...
asked 46 minutes ago