Enhanced methods for the undecachlorination of [HCB11H11]− and syntheses of [XCB11Cl11]− from [HCB11Cl11]− (X = Cl, Br, I, NH2)

Abstract

Utilizing SbCl₃/SbCl₅ mixtures at reflux, or of TCCA in a solid–solid reaction at 200 °C (with properly described precautions) are described as reliable and convenient procedures for the conversion of [HCB₁₁H₁₁]⁻ into [HCB₁₁Cl₁₁]⁻. Procedures for the derivatization of the carbon vertex of [HCB₁₁Cl₁₁]⁻ to prepare [XCB₁₁Cl₁₁]⁻ salts (X = Cl, Br, I, NH₂) are also formulated.