Q2. i) In Table 1 (column 3) determine the number of 1H NMR peaks (ignore splitting) that you would expect for each of the above (hint: the no. of different proton environments) and ii) (column 4) predict the simple splitting pattern for each type of proton. StructuralIsomers ofbutanol1-butanol(Example)2-butanol2-methyl-1-propanoltert-butanolHOHOOHOHStructure(Ctrl) -No. ofexpected ¹HNMR peaks(Total 1mark)5Expected splittingpatterns of ¹H NMRpeaks(i.e. singlet(s),doublet(d), multiplet(m)etc.,)(Total 2 marks)CH3CH2CH2CH2-OH br(s)CH3CH2CH2CH2-OH (t)CH3CH2CH2CH2-OH (m)CH3CH2CH2CH2-OH (m)CH3CH2CH2CH2-OH (t)Note: the CH3CH2CH2CH2-OHhydrogen atom rapidlyexchanges and as aconsequence, ignore coupling tothis atom.

In the given question given that four structural isomers of butanol : 1-butanol , 2-butanol ,…

Answered: i) In Table 1 (column 3) determine the…

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ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

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Q2. i) In Table 1 (column 3) determine the number of ¹H NMR peaks (ignore splitting) that you would expect for each of the above (hint: the no. of different proton environments) and ii) (column 4) predict the simple splitting pattern for each type of proton.

Structural
Isomers of
butanol
1-butanol
(Example)
2-butanol
2-methyl-1-
propanol
tert-butanol
HO
HO
OH
OH
Structure
(Ctrl) -
No. of
expected ¹H
NMR peaks
(Total 1
mark)
5
Expected splitting
patterns of ¹H NMR
peaks
(i.e. singlet(s),
doublet(d), multiplet(m)
etc.,)
(Total 2 marks)
CH3CH2CH2CH2-OH br(s)
CH3CH2CH2CH2-OH (t)
CH3CH2CH2CH2-OH (m)
CH3CH2CH2CH2-OH (m)
CH3CH2CH2CH2-OH (t)
Note: the CH3CH2CH2CH2-OH
hydrogen atom rapidly
exchanges and as a
consequence, ignore coupling to
this atom.

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