F. Jaroschik, F. Nief, and Xavier-Frédéric Le Goff
Jun 7, 2007
Citations
0
Influential Citations
62
Citations
Journal
Organometallics
Abstract
Reaction of sodium 1,2,4-tris(trimethylsilyl)cyclopentadienide [Na(Cp‘ ‘‘)] with [TmI2(THF)3] afforded the divalent thulium complex [(Cp‘ ‘‘)2Tm(THF)]. Its crystal structure is similar to that of the previously described [(Cpttt)2Tm(THF)] (Cpttt = 1,2,4-tris(tert-butyl)cyclopentadienyl). [(Cp‘ ‘‘)2TmI] was prepared by reaction of TmI3 with [K(Cp‘ ‘‘)] and could be reduced by KC8 into a new unsolvated, homoleptic complex, [(Cp‘ ‘‘)2Tm], which was characterized by NMR. [(Cp‘ ‘‘)2Tm] gave [(Cp‘ ‘‘)2Tm(THF)] by interaction with THF. A convenient alternative pathway to [(Cpttt)2Tm] by reduction of [(Cpttt)2Tm(BH4)] with KC8 was found: [(Cpttt)2Tm(BH4)] derives from [Tm(BH4)3(THF)3], which can be prepared from the less expensive TmCl3. On the other hand, the dimer [{(Cptt)2TmI}2] (Cptt = 1,3-bis(tert-butyl)cyclopentadienyl), obtained by reaction of TmI3 with [Na(Cptt)], gave only intractable results by reaction with KC8. The previously described TmII complex [(Dtp)2Tm] (Dtp = 2,5-di-tert-butyl-3,4-dimethylphos...