Synthesis and crystal structure of one carbon-atom bridged lutetium complex [Ph2C(Flu)(Cp)]LuN(TMS)2 and catalytic activity for polymerization of polar monomers
摘要:
The one-carbon atom bridged amide complex [Ph2C(Flu)(Cp)]LuN(TMS)(2) (2) (Flu = C13H8 Cp = C5H4, TMS = SiMe3) has been synthesized by reaction of its chloride precursor with LiN(TMS)(2) in toluene. An X-ray structure of the amide complex 2 exhibits apparently intramolecular Si-beta-C agostic interaction with Lu. Polymerization of methyl methacrylate (MMA) and lactones with this complex has also been investigated. (C) 2002 Elsevier Science B.V. All rights reserved.
Synthesis of diphenylmethylene bridged fluorenyl cyclopentadienyl lanthanocene complexes with Cs symmetry and crystal structures of the ate complexes [Li(thf )4][LnCl2{(C13H8)CPh2(C5H4)}] and [Li(thf )4][Ln(BH4)2{(C13H8)CPh2(C5H4)}] (Ln = Nd or La)
摘要:
无水镧系氯化物LnCl3与二锂盐(C13H9)CPh2(C5H5)在室温下四氢呋喃(thf)中的反应,导致了“ate”配合物[Li(thf)4][LnCl2{(C13H8)CPh2(C5H4)}](Ln = Lu 1或Y 2)的形成。在四氢呋喃溶液中,[Ln(BH4)3(thf)3]与三当量的(C13H8)CPh2(C5H4)Li2反应,得到了阴离子配合物[Li(thf)4][Ln(BH4)2{(C13H8)CPh2(C5H4)}](Ln = La 3或Nd 4)。通过测定配合物1、3、4的晶体结构,表明它们以独立的阳离子和阴离子对形式存在,且在晶胞中显示出两个晶体学独立的分子。