Fused-pentagon C70Cl26 obtained via chlorination-promoted Stone–Wales cage transformations of C70

Abstract

High-temperature (360 °C) chlorination of C₇₀ with VCl₄ or SbCl₅ yields only IPR C₇₀Cl_26/28. Chlorination with SbCl₅ at 440 °C resulted in a skeletal transformation via a two-step Stone–Wales rearrangement and the formation of non-IPR ⁸⁰⁰⁵C₇₀Cl₂₆ with two fused pentagon pairs in the carbon cage which was established by single crystal X-ray diffraction.