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- 12.34 How would you use infrared spectroscopy to distinguish between the follow- ing pairs of constitutional isomers? (a) CH3C=CCH3 文 and CH3CH2C=CH (b) CH3CH=CHCH3 and CH3CH,CH=CH2 (c) H2C=CHOCH3 CH3CH2CHO andHow can the two isomers having molecular formula C2H6O be distinguishedby IR spectroscopy?How can IR spectroscopy be used to distinguish between each pair of isomers?
- Nicotine is a diamino compound isolated from dried tobacco leaves. Nicotine has two rings and M+=162.1157 by high-resolution mass spectrometry. Give a molecular formula for nicotine, and calculate the number of double bonds.IR spectroscopy does not distinguish very well betweenisomers I and J. Explain why. How could UV–vis spectroscopy be used to distinguish between them1. Draw two constitutional isomers of the formula C6H11B1. Explain how you would differentiate those molecules using either spectroscopy or spectrometry. You only need to differentiate them using one example.
- 1.2 Draw the structures of the seven compounds of molecular formula C3H6O. For each compound tell what prominent IR absorption it exhibits above 1500 cm-¹.14. (5) Draw the structure of a compound that is consistent with the following data: a IR: 1690 cm -1 C9H1002 1Η NMR: triplet, 1.5 ppm, 3H; quartet, 4.1 ppm, 2H; doublet, 7.0 ppm, 2H; doublet, 7.7 ppm, 2H; singlet, 9.9 ppm, 1Hshows five isomers of C5H10O2. The two structures that would be hardest to distinguish by IR spectroscopy are
- III) Can 1H NMR spectroscopy be used to differentiate between the two compounds? Briefly explain why or why not. Predict the 1H NMR spectrum for each compound (include integration, multiplicity, and approximate chemical shift). For each set, be sure that you put them in a data table format!How would you use infrared spectroscopy to distinguish between the following pairs of constitutional isomers? and CH3CH₂C=CH (a) CH3C=CCH3 (b) 0 || CH3CCH=CHCH3 (c) H₂C=CHOCH 3 and and 0 || CH3CCH₂CH=CH₂ CH3CH2CHOHow would infrared spectroscopy be useful in distinguishing between the followingcompounds? Cite absorption bands you would expect from each.