Fig. 3: Open-fullerenes prepared from reaction of C60 with pyridazine derivatives.
From: Synthesis of endohedral fullerenes by molecular surgery

a An open-fullerene (18) with the core ethene-bridged structure of 8 is obtained in one-pot from C60, and undergoes regioselective oxidative cleavage. b Cycloaddition of C60/70 with a substituted triazine or pyridazine. Abbreviations: 2-pyridyl (Py), o-dichlorobenzene (ODCB), tetrakis(dimethylamino)ethylene (TDAE).