Cationic mono(pentamethylcyclopentadienyl)(2-methallyl) complexes of hafnium

被引:21
作者
Hessen, B
vanderHeijden, H
机构
[1] Shell International Chemicals B.V., Shell Research and Technology Centre, 1030 BN Amsterdam
关键词
allyl; catalysis; cyclopentadienyl;
D O I
10.1016/S0022-328X(96)06924-0
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Two new cationic mono(pentamethylcyclopentadienyl) organohafnium complexes with eta(3)-2-methallyl ligands, [(C5Me5)Hf(eta(3)-2-C4H7)Me][MeB(C6F5)(3)] (5) and [(C5Me5)Hf(eta(3)-2-C4H7)(2)][B(C6F5)(4)] (6), have been prepared. The former readily polymerises ethene, but is not active towards propene. The latter, with the weakly coordinating [B(C6F5)(4)] anion, oligomerises propene to atactic oligomers. In contrast with metallocene systems, the oligomerisation of a-olefins like propene is apparently readily initiated on the 2-methallyl groups in this complex.
引用
收藏
页码:237 / 239
页数:3
相关论文
共 15 条
  • [1] TRI-1-METHALLYL-BUTADIENE AND 1-METHALLYL-BUTADIENE GROUP-IV TRANSITION-METAL COMPLEXES
    BLENKERS, J
    MEIJER, HJD
    TEUBEN, JH
    [J]. JOURNAL OF ORGANOMETALLIC CHEMISTRY, 1981, 218 (03) : 383 - 393
  • [2] STEREOSPECIFIC OLEFIN POLYMERIZATION WITH CHIRAL METALLOCENE CATALYSTS
    BRINTZINGER, HH
    FISCHER, D
    MULHAUPT, R
    RIEGER, B
    WAYMOUTH, RM
    [J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 1995, 34 (11) : 1143 - 1170
  • [3] CPZR(ALLYL)3 - THE MOLECULAR-STRUCTURE OF A PI-DYNAMIC AND SIGMA-DYNAMIC ALLYL TRANSITION-METAL COMPLEX
    ERKER, G
    BERG, K
    ANGERMUND, K
    KRUGER, C
    [J]. ORGANOMETALLICS, 1987, 6 (12) : 2620 - 2621
  • [4] FORMATION OF CHIRAL MONO(ETA-5-CYCLOPENTADIENYL)ZIRCONIUM(II) COMPLEXES
    ERKER, G
    BERG, K
    BENN, R
    SCHROTH, G
    [J]. CHEMISCHE BERICHTE-RECUEIL, 1985, 118 (04): : 1383 - 1397
  • [5] ERKER G, 1984, ANGEW CHEM, V96, P445
  • [6] KINETIC AND MECHANISTIC ASPECTS OF PROPENE OLIGOMERIZATION WITH IONIC ORGANOZIRCONIUM AND ORGANOZIRHAFNIUM COMPOUNDS - CRYSTAL-STRUCTURES OF [CP-STAR-2MME(THT)]+[BPH4]-(M = ZR, HF)
    ESHUIS, JJW
    TAN, YY
    MEETSMA, A
    TEUBEN, JH
    RENKEMA, J
    EVENS, GG
    [J]. ORGANOMETALLICS, 1992, 11 (01) : 362 - 369
  • [7] MONO(ETA-CYCLOPENTADIENYL)BENZAMIDINATO ALKYL-COMPOUNDS OF TITANIUM AND ZIRCONIUM
    GOMEZ, R
    DUCHATEAU, R
    CHERNEGA, AN
    MEETSMA, A
    EDELMANN, FT
    TEUBEN, JH
    GREEN, MLH
    [J]. JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 1995, (02): : 217 - 225
  • [8] UNEXPECTED REACTIONS OF PENTAFLUOROPHENYLBORON COMPOUNDS WITH ETA-CYCLOPENTADIENYL(BENZAMIDINATO)ZIRCONIUM DERIVATIVES
    GOMEZ, R
    GREEN, MLH
    HAGGITT, JL
    [J]. JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1994, (22) : 2607 - 2608
  • [9] MONO-ETA-CYCLOPENTADIENYL-BENZAMIDINATO CHLORO COMPOUNDS OF TITANIUM, ZIRCONIUM AND HAFNIUM
    GOMEZ, R
    DUCHATEAU, R
    CHERNEGA, AN
    TEUBEN, JH
    EDELMANN, FT
    GREEN, MLH
    [J]. JOURNAL OF ORGANOMETALLIC CHEMISTRY, 1995, 491 (1-2) : 153 - 158
  • [10] TRIPLE PROTON ABSTRACTION FROM A 1-METHYLALLYL LIGAND ON THERMOLYSIS - FORMATION OF A HF3(C4H4) CLUSTER
    HESSEN, B
    SPEK, AL
    TEUBEN, JH
    [J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 1988, 27 (08): : 1058 - 1059