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An unknown compound gives a molecular ion of m/z 70 in the
Chapter 12, Problem 46SP(choose chapter or problem)
An unknown compound gives a molecular ion of 𝑚/𝑧 70 in the mass spectrum. It reacts with semicarbazide hydrochloride to give a crystalline derivative, but it gives a negative Tollens test. The NMR and IR spectra follow. Propose a structure for this compound, and give peak assignments to account for the absorptions in the spectra. Explain why the signal at \(1790 \mathrm{~cm}^{-1}\) in the IR spectrum appears at an unusual frequency.
Equation transcription:
Text transcription:
1790{~cm}^{-1}
Questions & Answers
QUESTION:
An unknown compound gives a molecular ion of 𝑚/𝑧 70 in the mass spectrum. It reacts with semicarbazide hydrochloride to give a crystalline derivative, but it gives a negative Tollens test. The NMR and IR spectra follow. Propose a structure for this compound, and give peak assignments to account for the absorptions in the spectra. Explain why the signal at \(1790 \mathrm{~cm}^{-1}\) in the IR spectrum appears at an unusual frequency.
Equation transcription:
Text transcription:
1790{~cm}^{-1}
ANSWER:Solution 46SP
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