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Option A5NMR spectroscopy
1H NMR spectroscopy can be used to obtain information about the
structure of molecules. Statethe
information that can be obtained from the:
a) Number of
peaks.___________________________________________________________________________
___________________________________________________________________________
[1]
b) Chemical
shift___________________________________________________________________________
___________________________________________________________________________
[1]
c) Interation !ratio of peak
areas)___________________________________________________________________________
___________________________________________________________________________
[1]
Identifyand explain"hether the follo"in atoms are NMR-activeor
NMR-inactive.
a) 1#C
_____________________________________________________________b) 1$C
_____________________________________________________________c) $1%
_____________________________________________________________d)
11&
_____________________________________________________________e) 1'(
_____________________________________________________________
Identify the uantities present on each a*is of an NMR
spectrum.
x-axis:
___________________________________________________________________________
y-axis:
___________________________________________________________________________
[2]
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Option A5NMR spectroscopy
Statethe correct I+%,C name of the follo"in compounds-
deducetheir condensed structural
formula- and identifyho" many different hydroen enironments
there are in each one.
Compound
Name
and
Condensed structural formula
Number of
hydrogen
environments
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Option A5NMR spectroscopy
Compound
Name
and
Condensed structural formula
Number of
hydrogen
environments
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Option A5NMR spectroscopy
Define the term chemical shift.
_________________________________________________________________________________
_________________________________________________________________________________
[1]
Identify"hich of the follo"in molecules "ould hae a CH#peak that
is most deshielded.
,. CH$CH#0&. CH$CH#ClC. CH$CH#&r. CH$CH#I
Identify"hich of the follo"in molecules "ould hae a CH$peak "ith
the highest chemical shift.
,. CH$CH(&. CH$C((HC. CH$(H. CH$CH$
Suggest an appropriate chemical shift rane for the CH#protons in
the follo"in molecules- usin2able 13 of the ata &ooklet.
a) CH$CH#CH$
________________________________________________________b) CH$CH#(H
________________________________________________________c)
CH$CH#CH(
________________________________________________________d)
CH$CH#C((H
________________________________________________________e)
H#C4CHCH$
________________________________________________________f) CH$CH#Cl
________________________________________________________)
CH$CH#(C(CH$
________________________________________________________h)
CH$CH#C((CH$
________________________________________________________
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Option A5NMR spectroscopy
Identify the number of peaks present in NMR spectra of the
follo"in compounds- and- "here
applicable- deducethe e*pected ratio of peak areas.
a)___________________________________________________________________________
___________________________________________________________________________
b)___________________________________________________________________________
___________________________________________________________________________
c)___________________________________________________________________________
___________________________________________________________________________
d)
CH$CH#(CH#CH$___________________________________________________________________________
___________________________________________________________________________
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Option A5NMR spectroscopy
+sin the information and spectra ien belo"- deducethe identity
of the follo"in compound-
e*plainin your reasonin.
1H NMR spectrum:
R spectrum:
Mass spectrum:
Molecular ion at m6!$#.
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
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Option A5NMR spectroscopy
+sin the information and spectra ien belo"- deducethe identity
of the follo"in compound-
e*plainin your reasonin.
1H NMR spectrum:
R spectrum:
Mass spectrum:
Molecular ion at m6!'8.
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
Interation 4 1:$
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Option A5NMR spectroscopy
+sin the information and spectra ien belo"- deducethe identity
of the follo"in compound-
e*plainin your reasonin.
1H NMR spectrum:
Mass spectrum:
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
Interation 4 1:'
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Option A5NMR spectroscopy
2he IR spectrum- mass spectrum and1H NMR spectrum of an unkno"n
oranic compound- - are as
follo"s. 2he compound is 5/.5; C and 9.#; H by mass.
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Option A5NMR spectroscopy
!a) Identifythe bonds most likely to be responsible for the
follo"in peaks in the IR
spectrum of X.
$888 cm
