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Article: ELECTROPHILIC HALOGENATION OF nido-5,6-C^sub 2^B^sub 8^H^sub 12^
- Article from:
- Collection of Czechoslovak Chemical Communications
- Article date:
- November 1, 2006
- Author:
CopyrightCopyright Institute of Organic Chemistry and Biochemistry Nov/Dec 2006. Provided by ProQuest LLC. (Hide copyright information)
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Room-temperature chlorination of the dicarbaborane nido-5,6-C^sub 2^B^sub 8^H^sub 12^ (1) with CCl^sub 4^ in the presence of anhydrous AlCl^sub 3^ yielded a mixture of 7-Cl-5,6-C^sub 2^B^sub 8^H^sub 11^ (7-Cl-1) (yield 34%), 4-Cl-5,6-C^sub 2^B^sub 8^H^sub 11^ (4-Cl-1) (yield 20%), 3-Cl-5,6-C^sub 2^B^sub 8^H^sub 11^ (3-Cl-1) (yield 21%), and 3,4-Cl^sub 2^-5,6-C^sub 2^B^sub 8^H^sub 10^ (3,4-Cl^sub 2^-1) (yield 26%), while a trisubstituted derivative, 3,4,7-Cl^sub 3^-5,6-C^sub 2^B^sub 8^H^sub 9^ (3,4,7-Cl^sub 3^-1) (yield 80%), was isolated as a sole product at reflux. Bromination of compound 1 with elemental Br^sub 2^ in the presence of Al powder at ambient temperature in CS^sub 2^ gave a ...