NMR Chemical Shifts of Trace Impurities: Common …

ethylene, propylene, and carbon dioxide) often encoun- ... carbonate,dimethylcarbonate,dimethylmalonate,furan, Apiezon H grease, hexamethylbenzene, hexamethyldisil-oxane, imidazole, pyrrole, and pyrrolidine), have also beenaddedtothisexpandedlist. Experimental Section All deuterated solvents were obtained …