Question

determine the structure of your unknown from the molecular formula, IR, and 13C NMR spectra. assign all of your 13C NMR absorptions.

IR & 1C NMR Lab Unknown Your group's mission is to determine the structure of your unknown from the molecular forrmula, IR and 13C NMR spectra. Assign all of your C NMR absorptions. You want to know which resonances correspond to which parts of the product's structure. The best way to do this is to draw a picture of the molecule right on the NMR spectrum then label each C on the molecule with a letter (C Ch, Ce...). Use these same labels right on the spectrum. Also tabulate your NMR data (chemical shift & interpretation). Identify as many IR absorptions as you can. ALL WORK MUST BE SHOWN! Use the space below and the back. Draw the final structure in the box below. Unknown # Structure: Which spectral lab problem set has the following functional group(s)? Talk to the other groups and instructor (in case not all of the problem sets have been assigned). Aromatic ketone Aromatic alcohol Alkene Aromatic aldehyde Ketone Alcohol Aldehyde Carboxylic acid

Answer 1

Double bond equivalent (DRE) Cotto 0) = 571-10 = 1 conclusion » One double bond is present IR 1740-1745 em 1 > Veco streek (exter) In IBENTUR 4 different carbon es present a 51ppm b > 177ppmu c) 34 ppm d > 19 ppm