
%0 Journal Article
%A Devillanova, FA 
%A Verani, G 
%T 'Selenation' as a diagnostic aid to reinvestigate the infrared spectra of benzimidazole-, benzoxazole- and benzothiazole-2-thiones
%J Australian Journal of Chemistry
%D 1980/02/01
%V 33
%N 2
%P 279-286
%K 
%R https://doi.org/10.1071/CH9800279
%U https://www.publish.csiro.au/paper/CH9800279 
%X The substitution of sulfur with selenium in benzimidazole- (bnt), benzoxazole- (bot) and benzothiazole-2-thione (btt) has been used to locate the vibrations related to the >C=S group. The thioketone bnt behaves like imidazolidine-2-thione, since it gives typical >C=S absorptions below 700 cm-1, while btt, like thiazolidine-2-thione, also gives rise to >C=S absorptions around 1000 cm-1. In bot the selenation also affects the NH modes, thus producing differences in several ranges of the infrared spectrum. The S- and Se-methiodides and the complexes obtained from these ligands with CdCl2 have been prepared and their infrared spectra compared with the free ligands; but it proves difficult to choose the site of coordination. 
