A new preparative method for the synthesis of oxonium derivatives of the decahydro-closo-decaborate anion

摘要

A new method for the synthesis of oxonium derivatives of the closo-decaborate anion in high yields was described. Reactions of the anion B_(10)H_(10)~(2-) with cyclic ethers (tetrahydrofuran (THF) and tetrahydropyran) in the presence of dry HCl are stepwise processes. Depending on the reaction temperature and time, either mono- or disubstituted products were obtained. Their structures were determined using ~(11)B, ~(13)C, and ~1H NMR and IR spectroscopy, ESI mass spectrometry, and elemental analysis for boron.