Simple Route to Bis(3-indenyl)methanes and the Synthesis, Characterization, and Polymerization Performance of Selected racemic-Dichloro[methylenebis(R_n-1-indenyl)]- zirconium Complexes

Abstract

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C1‐Symmetric Heterocyclic Zirconocenes as Catalysts for Propylene Polymerization, 2

“…The bridge effect seen here on molecular weights, although amplified, is similar to that already observed in the C 2 -symmetric racansa-bisindenyl zirconocenes: Me 2 C lowers the molecular weight. [36] More similar to other C 1 -symmetric complexes is the effect on isotacticity, with C 2 H 4 -bridged 10 giving higher isotacticity and melting point compared to 11.…”

Oxygen-Containing, Asymmetric “Dual-Side” Zirconocenes: Investigations on a Reversible Chain Transfer to Aluminum

“…The Cp Flu ϪZrϪCp Ind angle δ (Figure 2 [12] , Table 1, 128.1°) and ϕ (63.8°), the bite angle between the least-squares planes of the two Cp ligands, are in between those of the Zr complexes EBI [13] (δ ϭ 126.9° [ 14] , ϕ ϭ 62.1°) and EBF [15] (δ ϭ 129.0° [ 16] , ϕ ϭ 64.3°). In contrast, γ angles slightly larger than 180°(γ Flu ϭ 186.98°, γ Ind ϭ 182.82°) differ from results previously reported for other bridged indenyl and fluorenyl complexes for which typically values smaller than 180°were observed.…”

C2-Symmetric Zirconocenes for High Molecular Weight Amorphous Poly(propylene)

“…[17,18] 1-isopropylindene is reacted with 0.5 eq. of aqueous formaldehyde in DMSO at room temperature, with tBuOK as the catalyst, to give the bis(1-isopropyl-3-indenyl)methane ligand in good conversion.…”