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SPECTROSCOPY EXERCISE (#8) Identification of Organic Compounds by Nuclear Magnetic Resonance Spectroscopy (NMR), Infrared Spectroscopy (IR) and Mass Spectrometry (MS). Name TA Section # The following is an IR, a 70eV electron impact mass spectrum, a 62.3 MHz 13C NMR, and a 250 MHz 1H NMR of a compound with exact mass 162.0681. 1. Draw the functional group in the following box responsible for the peak in the IR spectrum appearing at the frequencies listed under the boxes. 3320 cm-1 1690 cm-1 2. Draw the structure in the following boxes for the ion appearing in the mass spectrum at the m/z ratio listed under the box. m/z 144 m/z 117 m/z 91 3. Fill in the following Table for the proton NMR data. Table. Proton NMR Spectral Data and Analysis. ?a #Hb mc Interpretation 1.42-1.50 1 m 1.69-1.77 1 m 1.93-2.01 1 m 2.63-2.71 1 m

          SPECTROSCOPY EXERCISE (#8)
Identification of Organic Compounds by Nuclear Magnetic Resonance
Spectroscopy (NMR), Infrared Spectroscopy (IR) and Mass
Spectrometry (MS).
Name
TA
Section #
The following is an IR, a 70eV electron impact mass spectrum, a 62.3 MHz 13C NMR,
and a 250 MHz 1H NMR of a compound with exact mass 162.0681.
1. Draw the functional group in the following box responsible for the peak in the IR
spectrum appearing at the frequencies listed under the boxes.
3320 cm-1
1690 cm-1
2. Draw the structure in the following boxes for the ion appearing in the mass spectrum
at the m/z ratio listed under the box.
m/z 144
m/z 117
m/z 91
3. Fill in the following Table for the proton NMR data.
Table. Proton NMR Spectral Data and Analysis.
?a
#Hb
mc
Interpretation
1.42-1.50
1
m
1.69-1.77
1
m
1.93-2.01
1
m
2.63-2.71
1
m

Show more…

SPECTROSCOPY EXERCISE (#8)
Identification of Organic Compounds by Nuclear Magnetic Resonance
Spectroscopy (NMR), Infrared Spectroscopy (IR) and Mass
Spectrometry (MS).
Name
TA
Section #
The following is an IR, a 70eV electron impact mass spectrum, a 62.3 MHz 13C NMR,
and a 250 MHz 1H NMR of a compound with exact mass 162.0681.
1. Draw the functional group in the following box responsible for the peak in the IR
spectrum appearing at the frequencies listed under the boxes.
3320 cm-1
1690 cm-1
2. Draw the structure in the following boxes for the ion appearing in the mass spectrum
at the m/z ratio listed under the box.
m/z 144
m/z 117
m/z 91
3. Fill in the following Table for the proton NMR data.
Table. Proton NMR Spectral Data and Analysis.
?a
#Hb
mc
Interpretation
1.42-1.50
1
m
1.69-1.77
1
m
1.93-2.01
1
m
2.63-2.71
1
m

Added by Christopher G.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

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Solved by Expert Madhur L

07/26/2023

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The exact mass of the compound is 162.0681. This information can be used to determine the molecular formula of the compound. Show more…

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SPECTROSCOPY EXERCISE (#8) Identification of Organic Compounds by Nuclear Magnetic Resonance Spectroscopy (NMR), Infrared Spectroscopy (IR), and Mass Spectrometry (MS). Name: Section: The following is an IR; a 70eV electron impact mass spectrum; 62.3 MHz 13C NMR; and 250 MHz 1H NMR of a compound with an exact mass of 162.0681. Draw the functional group in the following box responsible for the peak in the IR Spectrum appearing at the frequencies listed under the notes. 3320 cm-1 1690 cm-1 Draw the structure in the following boxes for the ion appearing in the mass spectrum with the mz ratio listed under the box. mz 144 mz 117 Fill in the following table for the proton NMR data. Table: Proton NMR Spectral Data and Analysis #H? Interpretation 1.42-1.50 1.69-1.77 1.93-2.01 2.63-2.71

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00:01 Hello everyone and this question on the basis of the ir spectrum we have to identify the function group and on the basis of the nmr we have to depict the structure of the molecule.

00:09 So first let's see for the ir spectrum.

00:15 For the ir spectrum the values that are given first it is 3320 centimeter inverse and the other value that is given as 1690 centimeter inverse.

00:29 So for 3320 inverse we can say that either it can have the oh group the oh functional group that is called the alcohol functional group or the nh group that is that is basically our amine functional group.

00:47 So these are the two functional groups which are possible for the range of 3320 centimeter inverse.

00:53 The other is given as 1690 centimeter inverse.

00:56 So it is basically for the membered carbonyl compound or we can say that it is for the the value ranges in the range of 1715 for the carbonyl compound but when it is for the less membered ring then a value decreases or when there is a conjugation the value decreases so the value comes in this region.

01:18 So it is for carbonyl compound carbonyl compound so this carbonyl can be either aldehyde sorry either ketone or aldehyde.

01:27 Basically it is for ketone itself we take it for ketone but we can say it is for carbonyl compound.

01:34 The value is basically in the range of if i describe the value it is basically in the range of 1715 centimeter inverse but due to conjugation due to conjugation the value decreases the value decreases hence it comes in this region...

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