SOLVED: Example 7: The IUPAC name of the ketone shown below is 2,6-bis[2'-(1"-butyl-6"-chlorobenzo[cd]indol-2"-(1"H)ylidene)ethylidene]cyclohexanone (see the section Cyanine Dyes in this manual). In methanol, it shows electronic absorption at Amax 648 nm. Upon acidification, the ketone is protonated at the carbonyl oxygen atom, which results in the formation of a cyanine dye with absorption in the near-infrared region at Amax 932 nm. Comment on the following analysis results of the ketone: HR-MS

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