dilithium tetrachlorocuprate; oxonium in tetrahydrofuran Yield given;

in tetrahydrofuran -30 gradC, 0.5 h, -5 gradC, 20 h; Yield given. Yields of byproduct given;

dilithium tetrachlorocuprate in tetrahydrofuran -30 gradC, 2h, 0 gradC, 20h; organometallic educts, other temperature and reaction time; Product distribution;