2. This structure was determined according to the procedure outlined in Ref. (b). Specifically:
The Proton NMR spectrum was obtained for Unknown 21.
Solubility tests using water, 5% NaOH, 5% HCl, and concentrated H2SO4 were conducted on Unknown 21. The unknown remained separated on top of the water, NaOH, and HCl solutions. In H2SO4, the unknown dissolved and turned the solution orange showing that it was soluble in H2SO4.
The IR spectrum was obtained for Unknown 21.
3. The unknown acid was determined to be 3-Heptanone. The degree of unsaturation of C7H10O was determined to be one. The IR spectrum showed that there was no OH and a peak at