Chlorination of Sulfonium Derivatives of closo-Decaborate Anion with Carboxyl-Containing Substituents

The reaction of sulfonium closo-decaborate derivatives containing carboxyl groups with sulfuryl chloride SO2Cl2 as a halogenating agent was studied. The reaction gave fully halogenated derivatives of the closo-decaborate anion, (n-Bu4N)[2-B10Cl9SR2] (R = -CH2COOEt, -CH2COOH), which was confirmed by B-11, H-1, and C-13 NMR and IR spectral data. The structure of the [2-B10Cl9S(CH2COOEt)(2)](-) anion was established using single crystal X-ray diffraction.

Automated summary

The study investigated the reaction of sulfonium closo-decaborate derivatives containing carboxyl groups with sulfuryl chloride as a halogenating agent, resulting in fully halogenated products. The structure of one of the products was confirmed using various spectroscopic techniques and further established through single crystal X-ray diffraction analysis.