Download 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. ... Reduction of nitronyl nitroxides using hexamethylenetetramine is a very convenient method for preparing the corresponding imino nitroxides and 2-imidazoline N-oxides. ... The reaction of nitronyl nitroxide 1a with Cu(NO 3 ) 2 ·3H 2 O gave [Cu(1a) 2 ](NO 3 ) 2 (H 2 O) 2 , in which Cu 2+ is square ...