Rac. -ethylidene

Chien JCW, Rausch MD, Mallin DT, Lin YG, Dong SH (1990) rac-Ethylidene(l-r 5-tetram-ethylcyclopentadienyl)(l-ri5-indenyl).dichlorotitanium and its homopolymerization of propylene to crystalline-amorphous block thermoplastic elastomers. J Am Chem Soc 112 2030-2031... 

In 1990, Chien et at. [5] discovered the nonsymmetiical metallocene rac-[ethylidene(l -ir -tetramethylcyclopentadienyl)(l-T) -indenyl)I titanium(IV)dichloride (1) with methylaluminoxane (MAO) as cocatalyst... 

Chien JCW, Rausch MD, Llinas GH, Lin Y, Winter HH (1991) Two-state propagation mechanism for propylene polymerization catalyzed by rac-anti-ethylidene(l-r 5-tetramethylcy-clopentadienyl)(l-r 5-indenyl).dimethyltitanium. J Am Chem Soc 113 8569-8570... 

Chien JCW, Llinas GH, Rausch MD, Lin YG, Winter HH, Atwood JL, Bott SG (1992) Metallocene catalysts for olefin polymerizations. XXIV. Stereoblock propylene polymerization catalyzed by rac-anri -ethylidene(l-T 5-tetramethylcyclopentadienyl)(l-r 5-indenyl) dimethyltitanium A two-state propagation. J Polym Sci A 30 2601-2617... 

Rausch, M. D. Lin, Y.-G Winter, H. H. Two-state propagation mechanism for propylene polymerization catalyzed by rac-[anti-ethylidene(l-r -tetramethylcyclopentadienyl)(l-r -indenyl)] dimethylti-tanium. J. Am. Chem. Soc. 1991,113, 8569-8570. (e) Lhnas, G H. Day, R. O. Rausch, M. D. Chien, J. C. W. Ethylidene(l-r -tetramethylcyclopentadienyl)(l-r -mdenyl)dichlorozirconium Synthesis, molecular structure, and polymerization catalysis. Organometallics 1993, 12, 1283-1288. (f) Babu, G. N. Newmark, R. A. Cheng, H. N. Llinas, G H. Chien, J. C. W. Microstructure of elastomeric polypropylenes obtained with nonsymmetric afua-titanocene catalysts. Macromolecules 1992, 25, 7400-7402. 

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