Chemistry Homework Solutions
Problem
#78381

Use IR Spectroscopy, Mass Spectroscopy, C NMR, and H NMR to determine structure of compounds

I have to answer questions about things like SODAR and chemical formula using IR Spectroscopy, Mass Spectroscopy, C NMR, and H NMR graphs for five unknown compounds. In order for me to answer the questions, I first need to determine which compound the graphs are describing. I know how to determine SODAR and chemical formulas, but I need help identifying the structure of the compounds using the graphs. The five sets of graphs of the unknown compounds are attached.

Attached file(s):
Attachments
4.pdf  View File
7.pdf  View File
15.pdf  View File
16.pdf  View File
24.pdf  View File

Attachment Content Summary (Note: view attachment at the above link before purchasing. Actual attachment content may vary slightly from that shown below.)

4.pdf
Compound #:



4
Elemental Analysis: C, 68.57; H, 8.56
Trans-2-butenal
IR 100
Mass Spec
transmittance




50




0
4000 3000 2000 1500 1000 500
Wavenumber / cm-1
13 1
C NMR H NMR
90 MHz




d
d



m m
7.pdf
Compound #:



7
Elemental Analysis: C, 74.32; H,14.80; N, 10.87



IR 100
Mass Spec
transmittance




50




0
4000 3000 2000 1500 1000 500
Wavenumber / cm-1
13 1
C NMR H NMR
90 MHz


d and t
overlapping


sep
q

2 overlapping multiplets
15.pdf
Compound #:



15
Elemental Analysis: C, 81.06; H, 8.17
Mass Spec: M+ m/e= 148

IR 100
transmittance




50




0
4000 3000 2000 1500 1000 500
Wavenumber / cm-1
13 1
C NMR H NMR
90 MHz




d
d
s d
16.pdf
Compound #:



16
Elemental Analysis: C, 68.21; H, 7.25
Mass Spec: M+ m/e= 194

IR 100
transmittance




50




0
4000 3000 2000 1500 1000 500
Wavenumber / cm-1
13 1
C NMR H NMR
90 MHz
t q

t
d m



t
24.pdf
Compound #:



24
Empirical Formula: C5H7
Mass Spec: M+ m/e= 134

IR 100
transmittance




50




0
4000 3000 2000 1500 1000 500
Wavenumber / cm-1
13 1
C NMR H NMR
90 MHz




2 lines
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Siva Kumar, MSc, MPhil - 4.5/5
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