| 摘要 |
The present invention is a germanium compound having the following general formula I: <IMAGE> in which n is a positive integer less than 50 when the general formula is linear and is between 3 and 50 when the general formula is cyclic, and preferably between 3 and 6, and the R radicals, which are identical or different, are chosen independently from hydrocarbyl radicals, or, the R radicals form a hydrocarbon chain optionally containing one or two heteroatoms, optionally substituted by one or more C1-C3alkyl radicals, which are optionally unsaturated, the compound of general formula I being, when it is linear, terminated by two radicals R3 Ge- and R3Ge-O- respectively, provided that the different R radicals cannot simultaneously correspond to a methyl radical and when the general formula I is cyclic, the two radicals attach to the same germanium atom, cannot correspond to a divalent chain of the formula: <IMAGE> Z1 and Z2 being chosen from methyl radicals or hydrogen atoms.
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