The spectroscopy information for an organic molecule is given below - VCE - SSCE Chemistry - Question 11 - 2021 - Paper 1
Question 11
The spectroscopy information for an organic molecule is given below.
number of peaks in 13C NMR
2
number of sets of peaks in 1H NMR
3
m/z of the last peak in the ... show full transcript
Worked Solution & Example Answer:The spectroscopy information for an organic molecule is given below - VCE - SSCE Chemistry - Question 11 - 2021 - Paper 1
Step 1
number of peaks in 13C NMR
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Answer
Given that there are 2 peaks in the 13C NMR, this indicates the presence of 2 distinct carbon environments in the organic molecule.
Step 2
number of sets of peaks in 1H NMR
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Answer
The information states there are 3 sets of peaks in the 1H NMR. This suggests that there are 3 unique hydrogen environments in the molecule, which indicates different types of hydrogen atoms present.
Step 3
m/z of the last peak in the mass spectrum
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Answer
The mass spectrum shows a peak at m/z = 60. This suggests the molecular weight of the molecule may be around 60 g/mol, which helps narrow down the possible structures.
Step 4
infra-red (IR) spectrum
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The IR spectrum indicates an absorption peak at 3350 cm-1, which is typical for O-H stretching (alcohols or phenols). This further assists in identifying the functional groups present in the organic molecule.
Step 5
Conclusion
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Answer
Considering the characteristics identified from the spectroscopy data, the only structure that fits with 2 carbon peaks, 3 hydrogen environments, molecular weight of approximately 60, and an O-H functional group is represented by option B.
