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5.1.1.1.2 Variation 2: From Digermanium Compounds

DOI: 10.1055/sos-SD-005-00003

Oshima, K.Science of Synthesis, (2003510.

Hexaphenyldigermane is a white solid, soluble in chloroform but insoluble in all other common organic solvents; it can, however, be recrystallized from benzene and from toluene. Hexaphenyldigermane has been cleaved by bromine in refluxing tetrachlorometh­ane to form bromotriphenylgermane, and by sodium in liquid ammonia to form (tri­phenylgermyl)sodium. Although sodium/potassium alloy and potassium metal appear to be too reactive in ethylene glycol dimethyl ether to effect cleavage of the hexaphenyldigermane alone, it appears that lithium will give the desired results (Scheme 4).[‌6‌] When lithium is allowed to react with hexaphenyldigermane in a small amount of ethylene glycol dimethyl ether, the reaction proceeds smoothly to completion in ca. 45h. Although only a 40% yield of triethyl(triphenylgermyl)silane was obtained as a derivative on treatment with chlorotriethylsilane, it is believed the mixture consists essentially of (triphen­ylgermyl)lithium.

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References


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