Homework Answers
The peak around 8 ppm (8.51 ppm, s) is coming from OH of acetic acid (CH3-C(=O)-OH). This peak is broad because of the H-atom is attached to a heteroatom (O).
Yes, the small peak at 8.51 ppm, the singlet, is coming from acetic acid.
The integration in the aromatic region at 7.28 ppm, the multiplet, is 7H because 5 H's belong to the aromatic phenyl ring (C6H5) and 2 H's belong to amine (NH2) group of aniline (C6H5NH2).
The 3 H's at 3.11 ppm, a singlet, corresponds to the methyl group (CH3) of acetic acid (CH3COOH).
Explanation: The hydrolysis of acetanilide (C6H5NHCOCH3) gives aniline (C6H5NH2) and acetic acid (CH3COOH).
i.e. C6H5NHCOCH3 + H2O ----> C6H5NH2 + CH3COOH
Add Answer to:
please help explain the nmr below... hydrolysis of acetanilude was taking place -WHERE IS THE PEAK...
in recrystallization of acetanilide experiment, i got a recovery yield of 10% and percentage yield of...
in
recrystallization of acetanilide experiment, i got a recovery yield
of 10% and percentage yield of 4%. My NMR of the revovered product
looks clean except for an extra peak that looks like acetic acid
from the reaction. However an OH peak of the acetic acid is
missing... please explain what the peaks could be and why my yields
are ao low but other test seem to prove the compound was pure
A (s) 8.51 #H - 1 3 (m)...
in a synthesis of acetanilide experiment, i performed recrystalization. i used my recovered product to test...
in
a synthesis of acetanilide experiment, i performed
recrystalization. i used my recovered product to test for
impurities. My TLC and melting point analysis seems as if there are
no impurities however my nmr shows an impurity maybe consistent
with hydrolysis of acetanilide. (50mg was mixed with 400
microliters of deuterated chloroform for NMR) the impurity that im
talking about can be seen below with label “figure this out”
is the peak because hydrolysis?
When could have hydrolysis happened and...
Is the small impurity on my hnmr of acetanildine from solvent residual signal? please explain why...
Is the small impurity on my hnmr of acetanildine from solvent
residual signal?
please explain why it is there and where it coems from
C(s) 2.11 #H-3 B (m) A (s) 8.51 #H-1 7.28 #H=5 7 6 5 3 2 4 f1 (ppm) (s, 1H), 7.66-6.90 (m, 5H), 2,11 (s3H) O'I 6.70- fiaure ou thi CO st
C(s) 2.11 #H-3 B (m) A (s) 8.51 #H-1 7.28 #H=5 7 6 5 3 2 4 f1 (ppm) (s, 1H), 7.66-6.90 (m,...
Explain # 7 compound name P-Chlorophenol elaborate on What 7. NMR-both C13 and HI -Please include...
Explain # 7 compound name P-Chlorophenol
elaborate on What 7. NMR-both C13 and HI -Please include the spectra-Please each peak Why is it a singlet? Why is it downfield or upfield? What peak corresponds to what signal etc... Nuclear Magnetic Resonance (list all peaks) Protons Chemical Shift(ppm) Aromatic Multiplicity-1 Integration 6.9 3.5 NHz Conclusion Please show the name and the chemical structure (Lewis Structure) of the compound. Show how (chemical equation) it is synthesized and the mechanism (chemical equations with...
need to know how to read each and determine the structure. Please list out step by...
need to know how to read each and determine the structure. Please
list out step by step.
Unknowns for 1H NMR Final Report 1) Chemical Formula: C,H,Br 3H PPM 2) Chemical Formula: C,H,O IR: Strong broad peak 3300cm 2H 2H PPM 3) Chemical Formula: C.H.00 IR: Strong broad peak at 3300cm-1 PPM
Which compound gives the following spectra? For the 1H-NMR assign all signals. interpret mol peak and...
Which compound gives the following spectra?
For the 1H-NMR assign all signals. interpret mol peak and base peak
in the mass spectrum if a mole peak exists. Assign at least two 13C
signals. How does the IR spectrum support your finding?
Check 200 180 160 120 80 60 40 20 0 140 a 100 ppm s, 3H t, 3 H d. 2 a. 2 H d. 2H s, 1 H 1 10 9 8 7 6 4 3 2 1...
and draw the Structures Determine the Hydrogen Deficiency Index Challenges: C4H8O2 1.2 8: 3H triplet 3.0...
and draw the Structures Determine the Hydrogen Deficiency Index Challenges: C4H8O2 1.2 8: 3H triplet 3.0 8: 2H quartet 3.6 8: 3H singlet CoH14 1.3 8: 9H singlet 7.2 8:5H multiplet C&H;N 3.7 8:2H singlet 7.2 8:5H singlet C.H.CI,O2 1.4 8: 3H triplet 4.3 8: 2H quartet 5.9 8: 1H singlet CsH1002 1.2 8:6H doublet 2.0 8:3H singlet 5.0 8: 1H septet 'H NMR Practice Problems Best thing is to first determine the Hydrogen Deficiency Index so you know the...
8. Sev eral students take a 1H NMR and 13C NMR spectra for an unknown compound...
8. Sev eral students take a 1H NMR and 13C NMR spectra for an unknown compound They each propose something about the identity of the unknown. For each argument, determine whether the argument is: (10 pts) MS: No M+2 peak present, the MW is an odd number 13C NMR: 130, 125, 65, 30, 15, 10 H NMR: 5.8 (1H dd) 5.5 1.3(3H, d 1.1 (3, t) A scientific argument is valid if the data and conclusion are both true, and...
H NMR Spectrum: For each signal: 1.) Identify its environment 2.) Identify its spin-spin coupling...
H NMR Spectrum:
For each signal:
1.) Identify its environment
2.) Identify its spin-spin coupling (identify how many protons
are 3 bonds away, causing the coupling)
3.) Identify its integration value
Why is the peak at 6.3 ppm broadened?
Explain why there are 2 doublets in the aromatic region, but 4
aromatic protons on benzocaine
Why is the quartet at ~4.3 ppm so far downfield compared to the
triplet at ~ 1.3 ppm?
What is the purpose of using sulfuric...
need help with both questions please! 3. The 'H and 1C NMR spectra of a compound...
need help with both questions please!
3. The 'H and 1C NMR spectra of a compound are given. The mass spectrum shows a M' with m/=154. The elemental analysis is %C, 70.11; %H, 7.19 ; %F. 12.32. Determine the structure of this compound. (5 pts ca Hi O F 3H nso 3H 41H t00 PPM 130 140 PРM 4. The 'H and "C NMR spectra of an unknown compound are shown below. The compound's mass spectrum shows a molecular ion...
in
recrystallization of acetanilide experiment, i got a recovery yield
of 10% and percentage yield of 4%. My NMR of the revovered product
looks clean except for an extra peak that looks like acetic acid
from the reaction. However an OH peak of the acetic acid is
missing... please explain what the peaks could be and why my yields
are ao low but other test seem to prove the compound was pure
A (s) 8.51 #H - 1 3 (m)...
in
a synthesis of acetanilide experiment, i performed
recrystalization. i used my recovered product to test for
impurities. My TLC and melting point analysis seems as if there are
no impurities however my nmr shows an impurity maybe consistent
with hydrolysis of acetanilide. (50mg was mixed with 400
microliters of deuterated chloroform for NMR) the impurity that im
talking about can be seen below with label “figure this out”
is the peak because hydrolysis?
When could have hydrolysis happened and...
Is the small impurity on my hnmr of acetanildine from solvent
residual signal?
please explain why it is there and where it coems from
C(s) 2.11 #H-3 B (m) A (s) 8.51 #H-1 7.28 #H=5 7 6 5 3 2 4 f1 (ppm) (s, 1H), 7.66-6.90 (m, 5H), 2,11 (s3H) O'I 6.70- fiaure ou thi CO st
C(s) 2.11 #H-3 B (m) A (s) 8.51 #H-1 7.28 #H=5 7 6 5 3 2 4 f1 (ppm) (s, 1H), 7.66-6.90 (m,...
Explain # 7 compound name P-Chlorophenol
elaborate on What 7. NMR-both C13 and HI -Please include the spectra-Please each peak Why is it a singlet? Why is it downfield or upfield? What peak corresponds to what signal etc... Nuclear Magnetic Resonance (list all peaks) Protons Chemical Shift(ppm) Aromatic Multiplicity-1 Integration 6.9 3.5 NHz Conclusion Please show the name and the chemical structure (Lewis Structure) of the compound. Show how (chemical equation) it is synthesized and the mechanism (chemical equations with...
need to know how to read each and determine the structure. Please
list out step by step.
Unknowns for 1H NMR Final Report 1) Chemical Formula: C,H,Br 3H PPM 2) Chemical Formula: C,H,O IR: Strong broad peak 3300cm 2H 2H PPM 3) Chemical Formula: C.H.00 IR: Strong broad peak at 3300cm-1 PPM
Which compound gives the following spectra?
For the 1H-NMR assign all signals. interpret mol peak and base peak
in the mass spectrum if a mole peak exists. Assign at least two 13C
signals. How does the IR spectrum support your finding?
Check 200 180 160 120 80 60 40 20 0 140 a 100 ppm s, 3H t, 3 H d. 2 a. 2 H d. 2H s, 1 H 1 10 9 8 7 6 4 3 2 1...
and draw the Structures Determine the Hydrogen Deficiency Index Challenges: C4H8O2 1.2 8: 3H triplet 3.0 8: 2H quartet 3.6 8: 3H singlet CoH14 1.3 8: 9H singlet 7.2 8:5H multiplet C&H;N 3.7 8:2H singlet 7.2 8:5H singlet C.H.CI,O2 1.4 8: 3H triplet 4.3 8: 2H quartet 5.9 8: 1H singlet CsH1002 1.2 8:6H doublet 2.0 8:3H singlet 5.0 8: 1H septet 'H NMR Practice Problems Best thing is to first determine the Hydrogen Deficiency Index so you know the...
8. Sev eral students take a 1H NMR and 13C NMR spectra for an unknown compound They each propose something about the identity of the unknown. For each argument, determine whether the argument is: (10 pts) MS: No M+2 peak present, the MW is an odd number 13C NMR: 130, 125, 65, 30, 15, 10 H NMR: 5.8 (1H dd) 5.5 1.3(3H, d 1.1 (3, t) A scientific argument is valid if the data and conclusion are both true, and...
H NMR Spectrum:
For each signal:
1.) Identify its environment
2.) Identify its spin-spin coupling (identify how many protons
are 3 bonds away, causing the coupling)
3.) Identify its integration value
Why is the peak at 6.3 ppm broadened?
Explain why there are 2 doublets in the aromatic region, but 4
aromatic protons on benzocaine
Why is the quartet at ~4.3 ppm so far downfield compared to the
triplet at ~ 1.3 ppm?
What is the purpose of using sulfuric...
need help with both questions please!
3. The 'H and 1C NMR spectra of a compound are given. The mass spectrum shows a M' with m/=154. The elemental analysis is %C, 70.11; %H, 7.19 ; %F. 12.32. Determine the structure of this compound. (5 pts ca Hi O F 3H nso 3H 41H t00 PPM 130 140 PРM 4. The 'H and "C NMR spectra of an unknown compound are shown below. The compound's mass spectrum shows a molecular ion...
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