10.1016/0040-4020(96)00287-6
The research aimed to investigate the reaction of 2-azidobenzothiazole and 1-azido-4-(3',5'-dimethyl-1'-pyrazolyl)tetrafluorobenzene with [60]fullerene, leading to the formation of imino[60]fullerenes. The study sought to determine whether the formation of azafulleroid ([5-6]-π bonding type) or aziridinefullerene ([6-6]-α bonding type) could be explained by the duality of azide decomposition mechanisms. Through the use of fast-atom bombardment mass spectrometry (FAB-MS) and 13C NMR spectroscopy, the researchers established the structures of three new imino[60]fullerenes: two monoadducts (5 and 7) and one bisadduct (8). The chemicals used in the process included [60]fullerene, 2-azidobenzothiazole, 1-azido-4-(3',5'-dimethylpyrazol-1'-yl)tetrafluorobenzene, toluene, chlorobenzene, and various solvents and reagents for synthesis and characterization, such as sodium nitrite, hydrochloric acid, and m-nitrobenzyl alcohol (NBA) used as a matrix in the mass spectrometry analysis. The conclusions drawn from the study were that the reaction pathways could indeed lead to the formation of both types of imino[60]fullerenes, and the structural assignments of the adducts were confirmed through the spectroscopic techniques employed.