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Synthesis and Structure of 1‐Cyclopentylindenyl Lanthanide(II) Complexes and Their Catalytic Behavior for Polymerization of Acrylonitrile
Author(s) -
Qi MinHua,
Shen Qi,
Gong XinQiang,
Shen ZhiQuan,
Weng LinHong
Publication year - 2002
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20020200609
Subject(s) - chemistry , cyclopentadienyl complex , tetrahydrofuran , lanthanide , acrylonitrile , molar ratio , polymerization , anhydrous , medicinal chemistry , oxygen atom , molecule , catalysis , tetrahedral molecular geometry , metal , cyclopentadiene , crystallography , crystal structure , organic chemistry , copolymer , ion , polymer , solvent
The reaction between K(1‐C 5 H 9 C 9 H 6 ) and anhydrous LnCl 3 (Ln=Sm, Yb) in the molar ratio of 2:1 in THF with subsequent treatment by Na‐K alloy afforded (1‐C 5 H 9 C 9 H 6 ) 2 Ln‐(THF) n (Ln=Sm, n =1; Ln=Yb, n =2), while the reaction of Sml 2 with K(1‐C 5 H 9 C 9 H 6 ) in the molar ratio of 1:2 in THF gave the anionic complex K(1‐C 5 H 9 C 9 H 6 ) 3 Sm(THF) 3 . The X‐ray structure of (1‐C 5 H 9 C 9 H 6 ) 2 Yb(THF) 2 showed that central metal Yb is coordinated by two cyclopentadienyl rings of 1‐cyclopentylindenyls and two oxygen atoms from two tetrahydrofuran molecules to form pseudo‐tetrahedral coordinate geometry. All these complexes are active for the polymerization of acrylonitrile.