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- W2949963484 abstract "In the presence of catalytic amounts of Pd(PPh3)4, 3,4-benzo-1,1,2,2-tetraethyl-1,2-germacyclobut-3-ene (1) readily undergoes the reversible σ-bond metathesis to give a dimer, 1,2,5,6-dibenzo-3,4,7,8-tetragermacycloocta-1,5-diene (6) below 100°C. However, at 160°C in toluene containing catalytic amounts of Pd(PPh3)4, both 1 and 6 afford an unsymmetrical dimer, 1,2,4,5-dibenzo-3,6,7,8-tetragermacycloocta-1,4-diene (8) with two isomeric products. In the presence of Pd(PPh3)4, 1,2-bis(diethylgermyl)benzene (18) undergoes dehydrocouling to give 1, which is smoothly converted to 6 under these conditions. The metal-metal σ-bonds of 1 and its silicon analogue are highly susceptible to hydrogermylation but not to hydrosilylation in the presence of Pd(PPh3)4." @default.
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- W2949963484 date "2000-10-01" @default.
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- W2949963484 title "A 3,4-benzo-1,2-germacyclobut-3-ene and related compounds. Palladium-catalyzed σ-metathesis, dehydrogenative coupling and hydrogermylation of the GeGe σ-bond" @default.
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- W2949963484 doi "https://doi.org/10.1016/s0022-328x(00)00471-x" @default.
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