HW5. Consider the following proton NMR (CDCl3) from a typical nitration of benza
ID: 1042524 • Letter: H
Question
HW5. Consider the following proton NMR (CDCl3) from a typical nitration of benzaldehyde reaction. Note that this is a crude NMR meaning no purification of the mass recovery was performed. How might the NMR results below relate to your data? In other words, does your data and this proton NMR tell the same story? Work through a-d below. 10 7 coit Consider the peak at 10.2 ppm. Correlate this signal to your product. a. b. Given your answer to part a above identify the peak at 10.45 ppm. What does the integration of these peaks tell you? c. d. How might the NMR correlate to your data from the lab?Explanation / Answer
a. The peak around 10.2ppm is aldehyde proton peak which tell that your compound aontain aldehyde group.
b.Peak around 10.45 is impurity
c.Integration below the one is impurity peak.Peak around 7.3ppm is CDCl3 peak and peak around 8-8.2ppm around are also impurity because their integration below 0.5ppm and peak around 7.8 , 8.3, 8.5, 8.8 are aromatic proton peaks.
d. So acc. to this NMR your compound is formed because nitobenzaldehdyde has 4 different aromatic proton and one aldehyde proton.
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