Question

Determine the structure of an unknown compound with molecular formula CoHoBr given the H NMR data on the next page and the following 13C NMR data with attached proton information (e -even -CH2 or quaternary; o odd CH or CHs): 6 136.8 (e), 131.5 (o), 129.9 (о), 127.3 (o), 126.6 (o), l 20.3 (e), 18.5 (o).

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I am having difficulty figuring out the signal at 6.2 ppm. the formula is C9H9Br and has an unsaturation number of 5

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