Dynamic HPLC study of C70 chlorination reveals a surprisingly selective synthesis of C70Cl8

A dynamic HPLC study of C70 chlorination led to the discovery, isolation, characterization, and development of the efficient preparatory procedures for two previously unknown soluble chlorofullerenes C70Cl8 and C70Cl6 and for insoluble [C70Cl8]n. A novel synthesis of 99% pure C70Cl10 with a nearly quantitative yield was also developed. The first stability study of C70Cl10,8,6 in solution showed that these compounds are very light-sensitive.