Chemistry of compounds with the 1-carba-closo-dodecaborane(12) framework

Abstract

Synthesis of various compounds containing the 1-carba-closo-dodecaborane cage is reported. The isolated derivatives include zwitterionic 1-L-1-CB11H11 (l = H3N and (CH3)2S) and 12-L-1-CB11H11 (L = (CH3)2S and CH3SCH2SCH3) compounds along with C-substituted derivatives of the general formula [1-X-CB11H11]- (X = HOOC, HO, CH3O, HS and CH3S). Direct halogenation of [1-CB11H12}- produces [7,8,9,10,12-Cl5-1-CB11H7]-, [7,8,9,10,11,12-X6-1-CB11H6]- (X = Cl, Br), [12-I-CB11H11]- and [7,12-I2-1-CB11H10]- substituted species. Constitution of all products was established by 1H, 11B, IR and mass spectrometry and is supported by some chemical reactions of the compounds.