9-Methylanthracene ultraviolet spectrum

FIGURE 7.21 The ultraviolet spectrum of 9-methylanthracene. (From Friedel, R. A., and M. Orchin, Ultraviolet Spectra of Aromatic Compounds, John Wiley and Sons, New York, 1951. Reprinted by permission.)... 

As an example, consider an unknown substance that has the molecular formula C15H12. A comparison of its spectrum (Fig. 7.21) with that of anthracene (Fig. 7.19) shows that the two speetra are nearly identical. Disregarding minor bathochromic shifts, the same general peak shape and fine structure appear in the spectra of both the unknown and anthracene, the model compoimd. You may then conclude that the unknown is a substituted anthracene derivative. Further structure determination reveals that the unknown is 9-methylanthracene. The spectra of model compounds can be obtained from published catalogues of ultraviolet spectra. In cases in which a suitable model compound is not available, a model compound can be synthesized and its spectrum determined. 

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See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

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