Study of reactions of some halides, cyclopentadienyl dichlorides, and bis(cyclopentadienyl) chlorides of lanthanides with trans-stilbene adducts withalkali metals [PhCHCHPh]M-center dot-(+) (M = Li, Na)

Reaction of SmI2(THF)(2) with metallic lithium and trans-stilbene in 1 : 2 : 2 ratio in DME gives the stilbene complex of divalent samarium (PhCHCHPh) Sm(DME)(2). This complex reacts with hydrogen in THF to give SmH2(THF)(2) a nd 1,2-diphenylethane. The reaction with (Me3Si)(2)NH gives the amide [(Me3 Si)(2)N](2)Sm(DME)(2) and the reaction with triphenylgermane yields Ph3GeGe Ph3. Reaction of CpLuCl2(THF)(2) with 2 equivalents of [PhCHCHPh](.-) Na+ i n DME results in the dimerization of stilbene fragments to give an ore-comp lex {Cp2Lu[mu-CH(Ph)CH(Ph)CH(Ph)CH(Ph)]}Na(DME)(3). In the reaction of Cp2G dCl with [PhCHCHPh](.-) Na+, the known complex Cp3Gd(THF) was isolated as t he only lanthanide-containing product.