A new method for the synthesis of carboxonium derivatives of the closo-decaborate anion [2,6-B10H8(O2CR)]–, where R = CH3, C2H5

Abstract

A single-stage scheme for the synthesis of carboxonium derivatives of the closo-decaborate anion by the reaction between the [B₁₀H₁₁]^– anion and carboxylic acids was proposed. Target compounds were separated and characterized by IR and ¹H, ¹¹B, ¹³C NMR spectroscopy. In addition to the target compounds, closo-decaborate cluster opening products ere formed, and in the reaction between the closo-decaborate anion and acetic acid, a polymeric product was observed. The polymeric product (Ph₄P)_n[2,6,3,7-B₁₀H₆O₂CCH₃]_n was characterized by X-ray diffraction.