Ethano-o-carborane

Owing to the acidity of the C-H hydrogen, the use of excess BuLi should be avoided in the preparation of the dianions of the mono-C-trimethylsilyl and C-H-substituted derivatives. 

The preparations presented here are for the isolation of the dianions. In actual practice, where the dianions are used as intermediates in the syntheses of other carborane species, these reactions may be run strictly in THE solution and the dianion products left unisolated in the solution. 

Submitted by MAITLAND JONES, Jr., ZHEN-HONG LI, and ROBERT P. L ESPERANCE  

Precise Mass. Calcd. for CiiH22 Bg °B2S03 342.2292, Found 342.2246. 

2-(o-Carboran-l-yl)ethanol tosylate is a white solid readily soluble in chlorinated solvents, benzene, and diethyl ether, but sparingly soluble in hexane. Treatment with conventional bases serves to eliminate p-toluenesulfonic acid. 

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Ethano-o-carborane is a white solid, which survives unchanged after heating at 350°C for 24 h. This four-membered carbon ring compound is remarkably stable and chemically inert. It remains untouched when treated with JV-bromosuccinimide, LiN(SiMej), Brj, or DDQ. The boron cage can be chlorinated with AlOs/CCU. ... 

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