in hexane byproducts: LiCl; inert atmosphere; slow addn. of 2 equiv. Me2GeCl2 to dilithiothiophene, stirring at room temp. for 24 h; filtration off of LiCl, pptn. on concn. (vac.); elem. anal.;

in hexane 1) -10 deg C, 2 h, 2) r.t., 24 h;

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