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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.
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.