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

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 H-1, B-11, C-13 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.