Abstract
Direct electrophilic substitutions have been carried out on B 9H 2− 9 in nonaqueous solvents under anaerobic conditions. Isolated products include amino-, trimethylamino-, dimethylsulphido-, and bis-(boranyl)keto-derivatives. Reaction of acetic anhydride/DMSO with B 11H 2− 11 yielded its dimethyl-sulphido-derivative which is fluxional in soltion. These compounds represent the first examples of non-halogenated derivatives of the B 9 and B 11 polyhedral boranes
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