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Which of the following structures corresponds to the mass spectrum shown below? 100 - Relative Intensity...
What chemical shift (in ppm, in a 1H NMR spectrum) might you expect for the H...
What chemical shift (in ppm, in a 1H NMR spectrum) might you expect for the H atom, shown in red, in the molecule below? O 0.8 O 1.4 O 2.5 O 3.2 O 5.6 Submit Answer Tries 0/1 What chemical shift (in ppm, in a 1H NMR spectrum) might you cxpcct for the H atom, shown in red, in the molecule below? 생 O 0.8 O 5.8 O 7.5 O 9.1 Submit Answer Tries 0/1 What chemical shift (in ppm,...
What is the structure of this compound? MASS SPECTRUM 100 Relative Intensities m/z 103-100% m/z 197-190...
What is the structure of this compound?
MASS SPECTRUM 100 Relative Intensities m/z 103-100% m/z 197-190 m/z 198-less than 1% 80 60 40 20 197 0.0t l.1 0.0 40 80 120 160 200 m/z H NMR spectrum, CDCls, 600 MHz 3.75 3.703 3.60 34 3.3 Chemical Shft (ppm) 3.65 3.55 Chemical Shft (ppm) 70 4.65 4.60 Chemical Shift (ppm) 1.26 1.24 122 120 1.18 1.16 Chemical Shift (ppm) 4.8 4.6 4.4.2 4.0 3.8 3.6 34 3.2 3.0 2.826 24 22...
2) From the structures given below, select which one correspond to the following 'H-NMR spectrum? Relative...
2) From the structures given below, select which one correspond to the following 'H-NMR spectrum? Relative integration is shown. the coh a) Explain the multiplicity and the chemical shift of each signal bj Indicate in each signal how you would calculate the coupling constants. c) Indicate the 1H coupling showing the above-indicated J values ? 6 H2N PPM
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...
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...
8. The structure and proton NMR spectrum of a molecule are shown below. The molecule has...
8. The structure and proton NMR spectrum of a molecule are shown below. The molecule has letters by each location that has one or more protons. The chemical shifts of the signals in the spectrum are listed at right with Roman numerals. On your answer page write the Roman numeral of the chemical shift of each family on the line by that family's letta B. - A. sicer Fam., Chemical shift (ppm) 4.2 II 3.5 III 2.75 IV V 1.15...
" Below is a H NMR spectrum of trimyristin (in CDC) (no integrations are shown). On...
" Below is a H NMR spectrum of trimyristin (in CDC) (no integrations are shown). On the structure of trimyristin below indicate the hydrogens responsible for the signals: (0.9 points) a) Circle and label with A: all the hydrogens that are responsible for the group of signals from 4.0 10 5.3 ppm do not consider signal splitting only consider information from chemical shift). b) Put in a box and label with B: all the hydrogens that are responsible for the...
4. Draw a clear and accurate NMR spectrum for the molecule shown below. Clearly show the...
4. Draw a clear and accurate NMR spectrum for the molecule shown below. Clearly show the number of peaks, and the integration, chemical shift and splitting of each peak. PP 5. Use the chemspider.com to look up the NMR spectrum for the compound in 4. Compare that spectrum to your answer in 4. Draw that spectrum here, explaining the differences between the actual spectrum and what you predicted. Don't worry if you what you initially drew was incorect PPM
Mass Spectrum (not shown): [M] 259 (100%) m/z IR Spectrum (not shown): 3060, 2985, 1600, 1550,...
Mass Spectrum (not shown): [M] 259 (100%) m/z IR Spectrum (not shown): 3060, 2985, 1600, 1550, 1501, 1350 cm1 (all listed are strong (s) unless otherwise indicated) H NMR Spectrum (400 MHz, CDCls, 25 'C) d (J 8Hz) d (J8 Hz) d (J-2 Hz) t (J 2 Hz) PPM 2H 2H 2H 1H 6H C NMR Spectrum (with DEPT), proton-decoupled (125 MHz, CDCl,, 25 c) CH) I(CH) (CH) (2 x C) (CH) 60 20 PPM
1a) Shown below are the mass spectrum of a substituted benzene. The base peak is the...
1a) Shown below are the mass spectrum of a substituted benzene.
The base peak is the molecular ion. Posted below are the 13 C NMR
and 1 H NMR spectra (ignore the 1H peak at 3.5 and 13C peak that is
a triad at 77 ppm) Provide the structure of the molecule
from these spectra.
1b) Provide a synthesis of the molecule starting from
benzene
CDCl3 240 QE-300 220200180 160 120 100 80 20 7 10 12
What chemical shift (in ppm, in a 1H NMR spectrum) might you expect for the H atom, shown in red, in the molecule below? O 0.8 O 1.4 O 2.5 O 3.2 O 5.6 Submit Answer Tries 0/1 What chemical shift (in ppm, in a 1H NMR spectrum) might you cxpcct for the H atom, shown in red, in the molecule below? 생 O 0.8 O 5.8 O 7.5 O 9.1 Submit Answer Tries 0/1 What chemical shift (in ppm,...
What is the structure of this compound?
MASS SPECTRUM 100 Relative Intensities m/z 103-100% m/z 197-190 m/z 198-less than 1% 80 60 40 20 197 0.0t l.1 0.0 40 80 120 160 200 m/z H NMR spectrum, CDCls, 600 MHz 3.75 3.703 3.60 34 3.3 Chemical Shft (ppm) 3.65 3.55 Chemical Shft (ppm) 70 4.65 4.60 Chemical Shift (ppm) 1.26 1.24 122 120 1.18 1.16 Chemical Shift (ppm) 4.8 4.6 4.4.2 4.0 3.8 3.6 34 3.2 3.0 2.826 24 22...
2) From the structures given below, select which one correspond to the following 'H-NMR spectrum? Relative integration is shown. the coh a) Explain the multiplicity and the chemical shift of each signal bj Indicate in each signal how you would calculate the coupling constants. c) Indicate the 1H coupling showing the above-indicated J values ? 6 H2N PPM
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...
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...
8. The structure and proton NMR spectrum of a molecule are shown below. The molecule has letters by each location that has one or more protons. The chemical shifts of the signals in the spectrum are listed at right with Roman numerals. On your answer page write the Roman numeral of the chemical shift of each family on the line by that family's letta B. - A. sicer Fam., Chemical shift (ppm) 4.2 II 3.5 III 2.75 IV V 1.15...
" Below is a H NMR spectrum of trimyristin (in CDC) (no integrations are shown). On the structure of trimyristin below indicate the hydrogens responsible for the signals: (0.9 points) a) Circle and label with A: all the hydrogens that are responsible for the group of signals from 4.0 10 5.3 ppm do not consider signal splitting only consider information from chemical shift). b) Put in a box and label with B: all the hydrogens that are responsible for the...
4. Draw a clear and accurate NMR spectrum for the molecule shown below. Clearly show the number of peaks, and the integration, chemical shift and splitting of each peak. PP 5. Use the chemspider.com to look up the NMR spectrum for the compound in 4. Compare that spectrum to your answer in 4. Draw that spectrum here, explaining the differences between the actual spectrum and what you predicted. Don't worry if you what you initially drew was incorect PPM
Mass Spectrum (not shown): [M] 259 (100%) m/z IR Spectrum (not shown): 3060, 2985, 1600, 1550, 1501, 1350 cm1 (all listed are strong (s) unless otherwise indicated) H NMR Spectrum (400 MHz, CDCls, 25 'C) d (J 8Hz) d (J8 Hz) d (J-2 Hz) t (J 2 Hz) PPM 2H 2H 2H 1H 6H C NMR Spectrum (with DEPT), proton-decoupled (125 MHz, CDCl,, 25 c) CH) I(CH) (CH) (2 x C) (CH) 60 20 PPM
1a) Shown below are the mass spectrum of a substituted benzene.
The base peak is the molecular ion. Posted below are the 13 C NMR
and 1 H NMR spectra (ignore the 1H peak at 3.5 and 13C peak that is
a triad at 77 ppm) Provide the structure of the molecule
from these spectra.
1b) Provide a synthesis of the molecule starting from
benzene
CDCl3 240 QE-300 220200180 160 120 100 80 20 7 10 12
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