Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... The use of 13 C NMR spectroscopy has been found to provide a simple and unambiguous method for the assignment of the position of the nitro group in 1-substituted nitroimidazole derivatives. ... The 13 C NMR spectra (20 MHz., with CD 3 SOCD 3 as solvent) were ...