August 10, 2011
by Arvin Moser, Team Manager, Application Scientists, ACD/Labs
Residual solvents are typically organic volatile chemicals that are not completely removed from the sample. Many residual solvents exhibit a characteristic pattern when examined via NMR. The goal of this puzzle is to identify a residual solvent by NMR.
The aliphatic region of the 1H NMR spectrum below is for an unknown acquired in CDCl3. Are any residual solvents evident?