The rm4">[3 + 2] cycloaddition reaction of C60 with pyridine-derived hydrazones (acting as dipolar reagents) was successfully conducted resulting in fullerene derivatives ref="#poc3601-eo-0010" rel="references:#poc3601-eo-0010 #poc3601-eo-0011">. The compounds were characterized by means of NMR, UV–Vis spectroscopy, and X-ray crystallography. The electrochemical behavior was also investigated. The fulleropyrazoline ref="#poc3601-eo-0010" rel="references:#poc3601-eo-0010"> exhibits anodically shifted reduction potentials of about 100 mV when compared with those for C60, whereas ref="#poc3601-eo-0011" rel="references:#poc3601-eo-0011"> exhibits cathodic shifts relative to pristine C60. The rm4">complexation reaction of ref="#poc3601-eo-0011" rel="references:#poc3601-eo-0011"> with metallic ions (Zn2+, Cd2+, and Fe2+) was achieved. Job and Benesi–Hildebrand analysis confirmed the formation of complexes with a molar ratio of 1:1 and binding constants between 2.26 × 105 and 1.59 × 105 M−1. Electrochemistry of these complexes showed a marked influence of the metal ion on the reduction potentials. Copyright