Disilenyl lithium

A mixture of disilenyl lithium (70 mg, 0.01 mmol) and 2-adamantanone (18 mg, 0.012 mmol) was placed in a Schlenk flask in a glove box and connected to a Schlenk line afterward. Dry oxygen-free toluene (1.5 mL) was added by vacuum transfer to this mixture. The reaction mixture was stirred at room temperature for 3 h. The solvent was evaporated in vacuo to give the silene (74 mg) as air- and moisture-sensitive yellow crystals in 74% yield. Mp 112-113°C. 

In a comparable way as outlined below for lead, Klinkhammer and coworkers obtained a number of oligosilanylated stannyl anions and radicals by reaction of oligosilanyl anions with diamino and diaryloxy stannylenes [246]. Scheschkewitz and coworkers found that the reaction of a disilenyl lithium species with Me2SnCl2 gave a chlorinated disilastanniranes (9) [247]. 

LITHIUM TRIS(2,4,6-TRIISOPROPYLPHENYL) DISILENIDE A VERSATILE REAGENT FOR THE TRANSFER OF THE DISILENYL GROUP... 

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