The reaction between K(1 C 5H 9C 9H 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 5H 9C 9H 6) 2Ln (THF) n (Ln=Sm, n =...The reaction between K(1 C 5H 9C 9H 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 5H 9C 9H 6) 2Ln (THF) n (Ln=Sm, n =1; Ln=Yb, n =2), while the reaction of SmI 2 with K(1 C 5H 9C 9H 6) in the molar ratio of 1∶2 in THF gave the anionic complex K(1 C 5H 9C 9H 6) 3Sm(THF) 3. The X ray structure of (1 C 5H 9C 9H 6) 2Yb(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.展开更多
文摘The reaction between K(1 C 5H 9C 9H 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 5H 9C 9H 6) 2Ln (THF) n (Ln=Sm, n =1; Ln=Yb, n =2), while the reaction of SmI 2 with K(1 C 5H 9C 9H 6) in the molar ratio of 1∶2 in THF gave the anionic complex K(1 C 5H 9C 9H 6) 3Sm(THF) 3. The X ray structure of (1 C 5H 9C 9H 6) 2Yb(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.
