A new half-sandwich Yb(II) complex with the tridentate cyclopentadienyl ligand [C 5 H 4 CH 2 CH(O)CH 2 OBu n ] 2− : synthesis, self-assembly of a tetranuclear cubane-like framework {[(η 5 -C 5 H 4 )CH 2 CH(μ 3 :η 1 -O)CH 2 OBu n ]Yb} 4 and oxidative alkylation by Me 2 Hg to the Yb(III) derivative [(η 5 -C 5 H 4 )CH 2 CH(η 1 -O)CH 2 OBu n ]YbMe(THF)
摘要:
The synthesis and crystal structure of the tetranuclear Yb(II) half-sandwich complex {[(eta(5)-C5H4)CH2CH(mu(3):eta(1)-O)CH2OB"]Yb}(4) (1) are presented. Redox transmetalation reaction of 1 with Me2Hg yields a methyl derivative of trivalent ytterbium, [(eta(5)-C5H4)CH2CH(eta(1)-O)CH2OBu"]YbMe(THF) (2). Complex 2 is shown to possess a low catalytic activity in propylene polymerization. (C) 2002 Elsevier Science B.V. All rights reserved.