I need help with all three
parts. Can you please explain to me how do I calculate J
values?
Homework Answers
The degree of unsaturation in the given molecular formula = {(2*12 + 2) - (17-1)}/2 = 5
From the given 1H NMR spectrum, the structure of the compound can be written as follows.
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I need help with all three
parts. Can you please explain to me how do I...
3) What is the structure of the compound in the following 1H-NMR spectrum with the molecular formula C2H, NO and a...
3) What is the structure of the compound in the following 1H-NMR spectrum with the molecular formula C2H, NO and a characteristic IR stretch near 1700 cm?? Relative integration is shown. a) Explain the multiplicity and the chemical shift of each signal b) Indicate in each signal how you would calculate the coupling constants (). Give an approximate value (range) for each of the expected J values c) Indicate the 'H coupling showing the above-indicated J values ? PPM
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
Hi could you help me with this problem please? The following spectroscopic data were obtained for...
Hi could you help me with this problem please? The following spectroscopic data were obtained for an organic compound: i. MS (relative abundance in parentheses): M+ = 86 ; signals at 29 (92) and 41 (100) among others ii. IR (cm-1): 3100 (weak sharp), 2970 (medium sharp), 2850 (medium), 1650 (weak sharp), 1100 (strong sharp) iii. H1 NMR : Signal A at 4 ppm (3H, triplet), Signal B at 3.53 ppm (2H quartet), Signal C at 4.01...
4) The 1H-NMR spectra shown below correspond to a compound of general formula CH,Br. Propose a...
4) The 1H-NMR spectra shown below correspond to a compound of general formula CH,Br. Propose a plausible structure for this compound. a) Explain the multiplicity and the chemical shift of each signal b) Indicate in each signal how you would calculate the coupling constants (5). Give an approximate value (range) for each of the expected ) values c) Indicate the 'H coupling showing the above-indicated J values ? -3.31 2.01 1.00 6.03
I need help with this IR in the picture, please. Only the solution works fine... don't...
I need help with this IR in the picture, please. Only the solution
works fine... don't need an explanation.
Answer the following questions (10 pt): 1. The following is a section of the 1H NMR spectrum of 4-bromo-2-nitroacetanilide in CDC13. Complete the table Chemical Signal Assigned Shift, multiplicity proton ppm 7.27 S 7.73 8.37 d 8.73 d 10.27 br dd 10.5 10.0 . 2. Explain the splitting pattern for the peak at 7.73 ppm
Please help me fill out this page I'm so lost. Please explain too, thank you! рр...
Please help me fill out this page I'm so lost. Please explain
too, thank you!
рр 0,43 2.dl 3.01 Code Number . STRUCTURE OF UNKNOWN (Draw Below) -. PROTON MAGNETIC RESONANCE SPECTRAL DATA Complete the table below by listing the chemical shifts of all of the signal patterns in the nmr spectrum of your compound (chemical shifts of clear multiplets are single numbers at the midpoint of the pattern, chemical shifts of complex multiplets are given as ranges). Assign the...
if you could also explain how you can determine the answer, I would really appreciate it!...
if you could also explain how you can determine the answer, I
would really appreciate it!
1. (15 points) Assign the resonances in the spectrum shown. The resonances on the spectrum are labelled A-D. On the lines provided, write the label that corresponds to each of the groups. The multiplicity (s = singlet, d = doublet, etc) and the integrals are given for each resonance. OCH3 + S, 6H H3 C CH₂ H OCH₃ x D s, 3H d, 2H...
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...
NMR, please help. 16) Chemical Formula: C,H,O, IR: strong peak 1720cm-1 PPM mple A4 thouis Yoo...
NMR, please help.
16) Chemical Formula: C,H,O, IR: strong peak 1720cm-1 PPM mple A4 thouis Yoo 05 quadret 1:2:2:1 Triplet 1:3:1 244 PPM USER: -- DATE: 04/12/10 08:27 PTS1d: 4096 Nuts - A4 OF1: 372.1 010 AlglobalVZGH.ppg SWI: 1000 PW: 19.6 us PD: 3.0 sec NA LB: 0.0 (ethylacetate) H3C CH₂ - CH3 C4H8O₂ 2. PROTON MAGNETIC RESONANCE SPECTRAL DATA Complete the table below by listing the chemical shiits of all of the signal patterns in the nmr spectrum of...
Please show all work! Thank you (: 1. Draw the 1H-NMR spectrum of 1,4-dimethoxybenzene. Clearly show...
Please show all work! Thank you (:
1. Draw the 1H-NMR spectrum of 1,4-dimethoxybenzene. Clearly show the multiplicity, the relative peak heights, and integration value of each signal in the 1H NMR spectrum. Chemical shifts. 1,4-Dimethoxybenzene: 3.80 (CH3), 6.80 ppm (Ph-H). (35 points) 2. What is the absorptivity of an analyte in a concentration of 5 mM with an absorbance of 0.8 when measured with a 1-cm pathlength cuvette. (25 points)
3) What is the structure of the compound in the following 1H-NMR spectrum with the molecular formula C2H, NO and a characteristic IR stretch near 1700 cm?? Relative integration is shown. a) Explain the multiplicity and the chemical shift of each signal b) Indicate in each signal how you would calculate the coupling constants (). Give an approximate value (range) for each of the expected J values c) Indicate the 'H coupling showing the above-indicated J values ? PPM
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
4) The 1H-NMR spectra shown below correspond to a compound of general formula CH,Br. Propose a plausible structure for this compound. a) Explain the multiplicity and the chemical shift of each signal b) Indicate in each signal how you would calculate the coupling constants (5). Give an approximate value (range) for each of the expected ) values c) Indicate the 'H coupling showing the above-indicated J values ? -3.31 2.01 1.00 6.03
I need help with this IR in the picture, please. Only the solution
works fine... don't need an explanation.
Answer the following questions (10 pt): 1. The following is a section of the 1H NMR spectrum of 4-bromo-2-nitroacetanilide in CDC13. Complete the table Chemical Signal Assigned Shift, multiplicity proton ppm 7.27 S 7.73 8.37 d 8.73 d 10.27 br dd 10.5 10.0 . 2. Explain the splitting pattern for the peak at 7.73 ppm
Please help me fill out this page I'm so lost. Please explain
too, thank you!
рр 0,43 2.dl 3.01 Code Number . STRUCTURE OF UNKNOWN (Draw Below) -. PROTON MAGNETIC RESONANCE SPECTRAL DATA Complete the table below by listing the chemical shifts of all of the signal patterns in the nmr spectrum of your compound (chemical shifts of clear multiplets are single numbers at the midpoint of the pattern, chemical shifts of complex multiplets are given as ranges). Assign the...
if you could also explain how you can determine the answer, I
would really appreciate it!
1. (15 points) Assign the resonances in the spectrum shown. The resonances on the spectrum are labelled A-D. On the lines provided, write the label that corresponds to each of the groups. The multiplicity (s = singlet, d = doublet, etc) and the integrals are given for each resonance. OCH3 + S, 6H H3 C CH₂ H OCH₃ x D s, 3H d, 2H...
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...
NMR, please help.
16) Chemical Formula: C,H,O, IR: strong peak 1720cm-1 PPM mple A4 thouis Yoo 05 quadret 1:2:2:1 Triplet 1:3:1 244 PPM USER: -- DATE: 04/12/10 08:27 PTS1d: 4096 Nuts - A4 OF1: 372.1 010 AlglobalVZGH.ppg SWI: 1000 PW: 19.6 us PD: 3.0 sec NA LB: 0.0 (ethylacetate) H3C CH₂ - CH3 C4H8O₂ 2. PROTON MAGNETIC RESONANCE SPECTRAL DATA Complete the table below by listing the chemical shiits of all of the signal patterns in the nmr spectrum of...
Please show all work! Thank you (:
1. Draw the 1H-NMR spectrum of 1,4-dimethoxybenzene. Clearly show the multiplicity, the relative peak heights, and integration value of each signal in the 1H NMR spectrum. Chemical shifts. 1,4-Dimethoxybenzene: 3.80 (CH3), 6.80 ppm (Ph-H). (35 points) 2. What is the absorptivity of an analyte in a concentration of 5 mM with an absorbance of 0.8 when measured with a 1-cm pathlength cuvette. (25 points)
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