Synthesis and Ethylene Polymerization by β-Diketiminato Zirconium Chlorides

Shifang Yuan; Liping Zhang; Diansheng Liu; Wen-Hua Sun

Macromolecular Research, Vol.18, No.7, 690-694, July, 2010

DOI10.1007/s13233-010-0704-9 Export Citation

Synthesis and Ethylene Polymerization by β-Diketiminato Zirconium Chlorides

Shifang Yuan^{1, 2}, Liping Zhang^{1, 2}, Diansheng Liu^{1, 3, †}, and Wen-Hua Sun^{4, †}

¹Institute of Applied Chemistry, Shanxi University, Taiyuan, 030006, China
²Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
³, China
⁴Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Chinese Academy of Sciences, Beijing, 100190, China

E-mail:,

Unsymmetrical β-diketiminato zirconium chlorides were prepared by an elimination reaction of ZrCl4 with the corresponding β-diketiminato lithium atoms [Li{N(Dipp)C(R)CHC(tBu)NH}]2 (Dipp=2,6-iPr2C6H3; R=Ph or Me). Two zirconium complexes were fully characterized by elemental, 1H, and 13C NMR analyses, and confirmed by single-crystal X-ray diffraction. These complexes, activated with methylaluminoxane (MAO) showed good activity towards ethylene polymerization, and produced high molecular weight polyethylene.

Keywords:β-diketiminate;zirconium;ethylene polymerization;molecular weight;polyethylene

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[3] Noh SK, Jiang WL, Lee DH, Macromol. Res., 12(1), 100 (2004)

[4] Bourget-Merle L, Lappert MF, Severn JR, Chem. Rev., 102(9), 3031 (2002)

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[6] Deelman B, Hitchcock PB, Lappert MF, Leung W, Lee H, Mak T, Organometallics, 18, 1444 (1999)

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[8] Qian B, Scanlon WJ, Smith MR, Motry DH, Organometallics, 18, 1693 (1999)

[9] Andres R, Jesus EF, Mata J, Flores JC, Gomez R, J. Organomet. Chem., 690, 939 (2005)

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[15] Lappert MF, Liu DS, J. Organomet. Chem., 500, 203 (1995)

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[17] Hitchcock PB, Lappert MF, Liu DS, J. Chem. Soc.-Chem. Commun., 1699 (1994)

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[21] Sheldrick GM, SHELXTL-97, Program for the Refinement of Crystal Structures, University of Gottingen, Germany, 1997.

[22] Hitchcock PB, Lappert MF, Layh M, Liu DS, Sablong R, Shun T, J. Chem. Soc.-Dalton Trans., 2301 (2000)

[23] Hitchcock PB, Lappert MF, Layh M, J. Chem. Soc.-Dalton Trans., 2409 (2001)

[24] Cheng YX, Hitchcock PB, Lappert MF, Zhou MS, Chem. Commun., 752 (2005)

[25] Chen X, Guan LL, Eisen MS, Li HF, Tong HB, Zhang LP, Liu DS, Eur. J. Inorg. Chem., 23, 3488 (2009)

[26] Coleman KS, Green MLH, Pascu SI, Rees NH, Cowley AR, Rees LH, J. Chem. Soc.-Dalton Trans., 3384 (2001)

[27] Pascu SI, Coleman KS, Cowley AR, Green MLH, Rees NH, New J. Chem., 29, 385 (2005)

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[29] Chen EYX, Marks TJ, Chem. Rev., 100(4), 1391 (2000)