Please explain! Some answers say 3 signals, some say 4 signals and
I don’t understandHomework Answers
ANSWER:
The number of peak in 1H NMR spectrum of 2,4-dimethyl-1,4-pentadiene is:
That means this compound will show 4 signal in which two signal (i.e. 1 & 2) will show doublet and another two signal will show singlet. Hence, option (C) is correct.
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Please explain! Some answers say 3 signals, some say 4 signals and
I don’t understand
23....
II. NMR Spectroscopy. Show your work with some brief notes/explanations and any calculations as needed. 1....
II. NMR Spectroscopy. Show your work with some brief notes/explanations and any calculations as needed. 1. The expected 'H NMR spectrum of the following compound is expected to have signals with multiplicities A. three; two doublets and a triplet C.four, two singlets, a double and a triplet E. None of these B.three; a singlet, a doublet and a quartet D.four, two singlets and two triplets 2. Which of the following is the best prediction of the chemical shifts for the...
1. How many distinct signals are expected in the proton-decoupled 13C NMR spectrum of 4-methyl-2-pentanol A....
1. How many distinct signals are expected in the proton-decoupled 13C NMR spectrum of 4-methyl-2-pentanol A. 3 B.4 C. 5 D. 6 2) what splitting pattern is observed in the proton NMR spectrum for the indicated BOLDED hydrogens CH3OCH2CH2CH2OCH3 a. Singlet B. doublet C. Triplet D. quartet
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....
10. Which compound is likely to have the following 'H NMR spectrum (integration is not given)?...
10. Which compound is likely to have the following 'H NMR spectrum (integration is not given)? 64 Singlet 2 quartet 1 triplet a) CHOCH.CH c) CH3OQCH.CH d) CH3CH2CCH.CH 11. Compound W has the formula CsH10. a) How many units of unsaturation does w have? Show your work b) The 'H NMR spectrum has the following signals: 1 H a 9.5 singlet 9H a 1.0 singlet What is the structure of W? Partial credit for anything you can say about the...
I do not understand why (2) is the correct answer. Please clearly explain and show .My...
I do not understand why (2) is the correct answer. Please
clearly explain and show .My test is tomorrow. lol Thank you.
The Newman Projection for a portion of the following molecule is given below. H O O Br 7.1. Which of the following describes the H NMR splitting pattern of the methine hydrogen (the one which is detected at the lowest field)? (1) doublet of doublets (2) triplet (3) singlet (4) triplet of quartets
50. For the following compound how many different signals would you see in the proton NMR?...
50. For the following compound how many different signals would you see in the proton NMR? (Assume that you can see them all.) A) 4 B) 5 C) 6 D) 7 E) 8 . An organic compound absorbs strongly in the IR at 1687 em. Its 'H NMR spectrum consists of two signals, a singlet at 2.1 ppm and a multiplet centered at 7.1 ppm. Its mass spectrum shows significant peaks at m/z 120, m/z 105 and m/z 77. This...
hello i need some help with this. please provide details. 1) Which compound gives the following...
hello i need some help with this. please provide
details.
1) Which compound gives the following spectra? For the 'H-NMR assign all signals. Interpret mol peak and base peak in the mass spectrum if a mole peak exists. Assign at least two c signals. How does the IR spectrum support your findings? (12 pts.) Relative Intensity 20- 20 40 60 80 100 120 140 160 180 200 200 180 160 140 120 100 80 60 40 20 ppm t, 1H...
PART 3 For each set of data on pages 5-9, calculate and record the degree of...
PART 3 For each set of data on pages 5-9, calculate and record the degree of unsaturation. Then use your problem solving skills to determine the chemical structure that is consistent with ALL of the data on each page. You are not required to label the spectra (but feel free to do so). This entire assignment is to be completed independently Suggestion for a general method to determine a chemical structure based on the provided molecular formula, IR, H-NMR and...
If you could please answer all the questions giving the correct answer so I can compare...
If you could please answer all the questions giving the
correct answer so I can compare them to mine I would appreciate
it
Thank you
or 1-3, draw a line-angle representation of each. Use dashes or wedge s where needed. . (1 point) 3,3-dimethyl-2-bromopentane 2. (1 point) cis-1,4-dimethylcyclohexane CH3 H2CH3 3. (1 point) CH CH3 4. (2 points) Give the systematic (IUPAC) name for this compound. 5. (1 point) Circle the compound that best matches this 13c NMR spectrum. 200...
Please finish answering #3, 5 & 6 1. Show all your work for converting the elemental...
Please finish answering #3, 5 & 6
1. Show all your work for converting the elemental analysis data to a molecular formula, 53.31, 4.4315+2.214 ).71122 12 o107 11.13 11.019& 2.214 = 4.117- /2 1.00714 2.21142.2114( 2 )5, १११4 Cro back 2. Show all your work for calculating the degrees of unsaturation for your unknown. 1o 2N 2 4 2.4+2 3. What it the m/z value of the expected parent ion? Calculate the expected intensity of the [M+1] ion relative to...
II. NMR Spectroscopy. Show your work with some brief notes/explanations and any calculations as needed. 1. The expected 'H NMR spectrum of the following compound is expected to have signals with multiplicities A. three; two doublets and a triplet C.four, two singlets, a double and a triplet E. None of these B.three; a singlet, a doublet and a quartet D.four, two singlets and two triplets 2. Which of the following is the best prediction of the chemical shifts for 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....
10. Which compound is likely to have the following 'H NMR spectrum (integration is not given)? 64 Singlet 2 quartet 1 triplet a) CHOCH.CH c) CH3OQCH.CH d) CH3CH2CCH.CH 11. Compound W has the formula CsH10. a) How many units of unsaturation does w have? Show your work b) The 'H NMR spectrum has the following signals: 1 H a 9.5 singlet 9H a 1.0 singlet What is the structure of W? Partial credit for anything you can say about the...
I do not understand why (2) is the correct answer. Please
clearly explain and show .My test is tomorrow. lol Thank you.
The Newman Projection for a portion of the following molecule is given below. H O O Br 7.1. Which of the following describes the H NMR splitting pattern of the methine hydrogen (the one which is detected at the lowest field)? (1) doublet of doublets (2) triplet (3) singlet (4) triplet of quartets
50. For the following compound how many different signals would you see in the proton NMR? (Assume that you can see them all.) A) 4 B) 5 C) 6 D) 7 E) 8 . An organic compound absorbs strongly in the IR at 1687 em. Its 'H NMR spectrum consists of two signals, a singlet at 2.1 ppm and a multiplet centered at 7.1 ppm. Its mass spectrum shows significant peaks at m/z 120, m/z 105 and m/z 77. This...
hello i need some help with this. please provide
details.
1) Which compound gives the following spectra? For the 'H-NMR assign all signals. Interpret mol peak and base peak in the mass spectrum if a mole peak exists. Assign at least two c signals. How does the IR spectrum support your findings? (12 pts.) Relative Intensity 20- 20 40 60 80 100 120 140 160 180 200 200 180 160 140 120 100 80 60 40 20 ppm t, 1H...
PART 3 For each set of data on pages 5-9, calculate and record the degree of unsaturation. Then use your problem solving skills to determine the chemical structure that is consistent with ALL of the data on each page. You are not required to label the spectra (but feel free to do so). This entire assignment is to be completed independently Suggestion for a general method to determine a chemical structure based on the provided molecular formula, IR, H-NMR and...
If you could please answer all the questions giving the
correct answer so I can compare them to mine I would appreciate
it
Thank you
or 1-3, draw a line-angle representation of each. Use dashes or wedge s where needed. . (1 point) 3,3-dimethyl-2-bromopentane 2. (1 point) cis-1,4-dimethylcyclohexane CH3 H2CH3 3. (1 point) CH CH3 4. (2 points) Give the systematic (IUPAC) name for this compound. 5. (1 point) Circle the compound that best matches this 13c NMR spectrum. 200...
Please finish answering #3, 5 & 6
1. Show all your work for converting the elemental analysis data to a molecular formula, 53.31, 4.4315+2.214 ).71122 12 o107 11.13 11.019& 2.214 = 4.117- /2 1.00714 2.21142.2114( 2 )5, १११4 Cro back 2. Show all your work for calculating the degrees of unsaturation for your unknown. 1o 2N 2 4 2.4+2 3. What it the m/z value of the expected parent ion? Calculate the expected intensity of the [M+1] ion relative to...
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