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Determining a structure

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I have tried to work out the following problem. Attached to this is a file that show NMR, IR and Mass spec info. I have come up with what I think the compound is but it does not work because the formula has more than one o. I have circled the carbonyl peak as well as the sp3 C-H peak.

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The first thing you must do when trying to find the structure from an NMR, or IR, is to calculate the degrees pf unsaturation. Thus,

Degrees of Unsaturation =# Carbons - (# Hydrogens + Halogens)/2 + (# Nitrogens)/2 + 1
= 6 - (12+0)/2 + ...

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