| 摘要 |
An organic compound of an alkali metal, of the formula I <IMAGE> (I) which is obtained by reaction of an appropriate diarylethylene of the formula II with an alkali metal (M), especially lithium, <IMAGE> (II) where Ar1 and Ar2 are identical or different aryl or hetaryl radicals which have one or more rings which are either separate or fused, and where R is at least one substituent different from hydrogen and which is chemically inert to the alkali metal or its alkyl, with the proviso that the total of the carbon atoms in all the R is at least 3, and m and n are each an integer up to 4, is used for the preparation of polymers whose monomers are amenable to anionic polymerization.
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