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- W2116718228 abstract "The di-Grignard reagent methylenedimagnesium dibromide, CH2(MgBr)2 (1), which can be prepared from dibromomethane and magnesium amalgam in diethyl ether/benzene 1/1, has been obtained in a pure form. Treatment of 1 with tetrahydrofuran gave insoluble 5″, a reagent with the approximate composition CH2Mg·CH2(MgBr)2. Both reagents were used for the synthesis of the dimetallomethanes (Me3M)2CH2 (M = Si, Ge, Sn) and (CH2(HgBr)2. Reaction of 1 or 5″ with dichlorodimethylgermane or dichlorodimethylstannane gave the polygermacycloalkanes ((Me2GeCH2)n; n = 2,3,4) or polystannacycloalkanes ((Me2SnCH2)n; n = 3,4), respectively, in useful yields (10 to 35%). In the germanium series, there is a pronounced tendency to form the smaller ring systems; in particular, the reaction of 5″ with Me2GeCl2 gave 30–35% of 1,1,3,3,-tetramethyl-1,3-digermacyclobutane. In contrast, the corresponding distannacyclobutane was not observed, but the eight-membered species (Me2MCH2)4 was formed more readily for M = Sn (9% yield) than for M = Ge (2% yield)." @default.
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- W2116718228 date "1985-06-01" @default.
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- W2116718228 title "Some applications of the methylene di-Grignard reagent for the synthesis of main group IV organometallic compounds" @default.
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- W2116718228 doi "https://doi.org/10.1016/0022-328x(85)80101-7" @default.
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