New Giant Fullerenes Identified as Chloro Derivatives: Isolated-Pentagon-Rule C₁₀₈(1771)Cl₁₂ and C₁₀₆(1155)Cl₂₄ as well as Nonclassical C₁₀₄Cl₂₄

High temperature chlorination of HPLC fractions of higher fullerenes followed by single crystal X-ray diffraction with the use of synchrotron radiation resulted in the structure determination of IPR C106(1155)­Cl24 and IPR C108(1771)­Cl12. C106(1155)­Cl24 is cocrystallized with C104Cl24, a chloride of the nonclassical isomer of C104. The moderately stable isomer C106(1155) and the most stable C108(1771) represent so far the largest pristine fullerenes with known cages.