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
number of sets of peaks in 1H NMR
m/z of the last peak in the mass... 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
There are 2 peaks in the 13C NMR spectrum, which suggests the presence of two distinct carbon environments in the molecule.
Step 2
number of sets of peaks in 1H NMR
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Answer
The 1H NMR shows 3 sets of peaks, indicating that there are three different types of hydrogen environments in the molecule.
Step 3
m/z of the last peak in the mass spectrum
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Answer
The m/z value of 60 for the last peak suggests that the molecular weight of the organic molecule is around 60 g/mol.
Step 4
infra-red (IR) spectrum
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Answer
The absorption peak at 3350 cm⁻¹ typically corresponds to an -OH (hydroxyl) group, suggesting the presence of alcohol or phenol functional groups in the organic molecule.
Step 5
Conclusion
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Answer
Based on the above analysis, the organic molecule is identified as structure B, which fits all the spectroscopy data provided.
