IR spectrum and absorption peaks of propyl p-tolyl ether
For the IR or Infrared spectrum and labeled absorption peaks of propyl p-tolyl ether. What bond or functional group does each major peak represent?
Homework Answers
Propyl p-tolyl ether has the structure shown below:
The major IR peaks are:
Aryl Ring C-H stretching: 3100-3000 cm-1
Alkyl C-H stretching: 2970-2800 cm-1
Aryl Ring C=C stretching: 1620-1440 cm-1
Alkyl C-C stretching: 1100-1000 cm-1
C-O stretching: 1200-1100 cm-1
Alkyl C-H bending: 1440-1300 cm-1 and 1000-800 cm-1
Aryl ring C-H bending: 800-700 cm-1
4. You will analyze the purity of propyl-p-tolyl ether by GC. Assuming that some n-Pr-I (starting...
4. You will analyze the purity of propyl-p-tolyl ether by GC. Assuming that some n-Pr-I (starting material) is present, which compound, n-Pr-I or propyl-para-tolyl ether (product), eluted from the gas chromatography column first (had the shorter retention time). Explain the order of compound elution in terms of molecular structure and boiling point. 5. Using the same experimental procedure as in this experiment, explain why using para-bromotoluene and sodium n-propanoxide (which in principle, would give the same product) would not work....
1) Predict and assign in the major peaks in the IR spectrum of a) n-propyl acetate,...
1) Predict and assign in the major peaks in the IR spectrum of a) n-propyl acetate, CH3COOCH2CH2CH3 and b) 2-methyl-1-propyl acetate, CH3COOCH2CH(CH3)2 2) Predict and assign in the major peaks in the 1H NMR spectrum of a) n-propyl acetate, CH3COOCH2CH2CH3 and b) 2-methyl-1-propyl acetate, CH3COOCH2CH(CH3)2 3) Predict the appearance of the 1H NMR spectrum of a) methyl acetate, CH3COOCH3 and b) ethyl propionate, CH3CH2COOCH2CH3 Thank you!
Consider the IR spectrum for cyclododecanol (below). There is a broad absorption at about 3250 cm^-1....
Consider the IR spectrum for cyclododecanol (below). There is a broad absorption at about 3250 cm^-1. What functional group is responsible for this absorption, and why is the absorption broad? Consider the IR spectrum for cyclododecanone (below). In the functional group region of the IR spectrum, specify the absorption associated with the carbon-oxygen double bond.
3. shown below is the IR spectrum 2-acetylcyclohexanone (the structure is provided in the spectrum). 2-acetylcyclohexanone...
3. shown below is the IR spectrum 2-acetylcyclohexanone (the
structure is provided in the spectrum). 2-acetylcyclohexanone
Exists as an equilibrium mixture of diketone and two enol forms.
Both the diketonr and enol forms can be seen in the provide IR
spectrum although the two different enols cannot be distinguished.
The IR spectra of both enols is essentially identical and so do not
be concerned with distinguishing the enols, just assign peaks to a
"generic" enol.
On the spectrum identify the...
For each of the major absorption peaks that you have identified in the IR spectra of...
For each of the major absorption peaks that you have identified in the IR spectra of methyl benzoate and your triphenylmethanol derivative, list the frequencies and functional group to which it corresponds to.
Please complete the table given the following IR spectrum! Thank you! 3324.10cm-1.86.06%T 1% 2956.20cm-1, 76.48% !...
Please complete the table given the following IR spectrum! Thank
you!
3324.10cm-1.86.06%T 1% 2956.20cm-1, 76.48% ! 2859.20cm-1, 74.06%T 2928.22cm-1, 64.55%T 65- 64- 4000 3500 3000 2500 2000 cm-1 20. (pts.) Using your infrared spectrum of the pure ester product, complete the table below for all peaks with Trequencies greater than 1500 cm' that can be assigned to vibrations of specific bonds. For each pean give me Frequency, the specific bond that vibration frequency refers to and where appropriate the functional...
1. shown below are IR spectra of cyclohexanecarbaldehyde (I) and cyclohexene (II). which of the spectra...
1. shown below are IR spectra of cyclohexanecarbaldehyde (I)
and cyclohexene (II). which of the spectra A and B corresponds to
which structure (I or II)? On each spectrum identify the peaks that
are associated with a specific bond vibration bond by drawing the
functional group for that bond, circling the specific vibrating
bond and drying and arrow from the circled bond to the absorption
peak. include all the C-H bonds.
2. provided below are IR spectra of
1,2,3,6-tetrahydrobenzaldehyde (I)...
6. Show the equation that is used to calculate the frequencies of IR absorption peaks. What...
6. Show the equation that is used to calculate the frequencies of IR absorption peaks. What does the frequency of an IR absorption peak depend on?
3. (3 pts.) Shown below is the IR spectrum 2-acetylcyclohexanone (the structure is provided in the...
3. (3 pts.) Shown below is the IR spectrum 2-acetylcyclohexanone (the structure is provided in the spectrum). 2- acetylcyclohexanone exists as an equilibrium mixture of diketone and two enol forms. Both the diketone and enol forms can be seen in the provide IR spectrum, although the 2 different enols cannot be distinguished. The IR spectra of both enols is essentially identical and so do not be concerned with distinguishing the enols, just assign peaks to a “generic" enol. On the...
IR Worksheet 1. For each spectrum below: 1) Label the major peaks with their approximate frequency....
IR Worksheet 1. For each spectrum below: 1) Label the major peaks with their approximate frequency. 2) Identify the bond vibration and possible functional group associated with each peak. 3) Match the spectra to one of these possible compounds: NH2 TRANSMITTANCE[%] pobo edo "2060 bo zdoo 160 Tobo 560 WAVENUMBER [cm-1] oot 08 TRANSMITTANCE [%] 09 01 02 4000 3500 3000 2500 2000 WAVENUMBER (cm-1] 1500 1000 500 οοο TRANSMITTANCE (6) οο οο οε 4000 3500 3000 1500 1000 2500...
4. You will analyze the purity of propyl-p-tolyl ether by GC. Assuming that some n-Pr-I (starting material) is present, which compound, n-Pr-I or propyl-para-tolyl ether (product), eluted from the gas chromatography column first (had the shorter retention time). Explain the order of compound elution in terms of molecular structure and boiling point. 5. Using the same experimental procedure as in this experiment, explain why using para-bromotoluene and sodium n-propanoxide (which in principle, would give the same product) would not work....
Consider the IR spectrum for cyclododecanol (below). There is a broad absorption at about 3250 cm^-1. What functional group is responsible for this absorption, and why is the absorption broad? Consider the IR spectrum for cyclododecanone (below). In the functional group region of the IR spectrum, specify the absorption associated with the carbon-oxygen double bond.
3. shown below is the IR spectrum 2-acetylcyclohexanone (the
structure is provided in the spectrum). 2-acetylcyclohexanone
Exists as an equilibrium mixture of diketone and two enol forms.
Both the diketonr and enol forms can be seen in the provide IR
spectrum although the two different enols cannot be distinguished.
The IR spectra of both enols is essentially identical and so do not
be concerned with distinguishing the enols, just assign peaks to a
"generic" enol.
On the spectrum identify the...
Please complete the table given the following IR spectrum! Thank
you!
3324.10cm-1.86.06%T 1% 2956.20cm-1, 76.48% ! 2859.20cm-1, 74.06%T 2928.22cm-1, 64.55%T 65- 64- 4000 3500 3000 2500 2000 cm-1 20. (pts.) Using your infrared spectrum of the pure ester product, complete the table below for all peaks with Trequencies greater than 1500 cm' that can be assigned to vibrations of specific bonds. For each pean give me Frequency, the specific bond that vibration frequency refers to and where appropriate the functional...
1. shown below are IR spectra of cyclohexanecarbaldehyde (I)
and cyclohexene (II). which of the spectra A and B corresponds to
which structure (I or II)? On each spectrum identify the peaks that
are associated with a specific bond vibration bond by drawing the
functional group for that bond, circling the specific vibrating
bond and drying and arrow from the circled bond to the absorption
peak. include all the C-H bonds.
2. provided below are IR spectra of
1,2,3,6-tetrahydrobenzaldehyde (I)...
6. Show the equation that is used to calculate the frequencies of IR absorption peaks. What does the frequency of an IR absorption peak depend on?
3. (3 pts.) Shown below is the IR spectrum 2-acetylcyclohexanone (the structure is provided in the spectrum). 2- acetylcyclohexanone exists as an equilibrium mixture of diketone and two enol forms. Both the diketone and enol forms can be seen in the provide IR spectrum, although the 2 different enols cannot be distinguished. The IR spectra of both enols is essentially identical and so do not be concerned with distinguishing the enols, just assign peaks to a “generic" enol. On the...
IR Worksheet 1. For each spectrum below: 1) Label the major peaks with their approximate frequency. 2) Identify the bond vibration and possible functional group associated with each peak. 3) Match the spectra to one of these possible compounds: NH2 TRANSMITTANCE[%] pobo edo "2060 bo zdoo 160 Tobo 560 WAVENUMBER [cm-1] oot 08 TRANSMITTANCE [%] 09 01 02 4000 3500 3000 2500 2000 WAVENUMBER (cm-1] 1500 1000 500 οοο TRANSMITTANCE (6) οο οο οε 4000 3500 3000 1500 1000 2500...
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