Bis(imidodithiodiphosphinato) titanium and zirconium complexes: Synthesis, characterization, and their catalytic activity in the polymerization of α-Olefins

TY - JOUR

T1 - Bis(imidodithiodiphosphinato) titanium and zirconium complexes

T2 - Synthesis, characterization, and their catalytic activity in the polymerization of α-Olefins

AU - Chen, Fapu

AU - Kapon, Moshe

AU - Woollins, D.

AU - Eisen, Moris S.

PY - 2009/4/27

Y1 - 2009/4/27

N2 - synthesis, characterization, and low-temperature crystal structures of a family of group 4 complexes containing different numbers of imidodithiodiphosphinate ligands and different metal oxidation states is presented. Their catalytic activity in the polymerization of ethylene and propylene was studied. For ethylene, when these complexes are activated with methylalumoxane (MAO), they are active catalysts in the polymerization producing extremely high molecular weight, high-density polyethylene with very narrow polydispersities. However, for propylene, the activity of these complexes is low, producing only atactic polypropylene. The bis(imidodithiodiphosphinate) titanium(bis(amido)) complex 6e has a singular reactivity, which upon heating forms the corresponding imido complex with the concomitant elimination of Et3N and the formation of the homoleptic complex tris(imidodithiodiphosphinate) titanium(III) (6h).

AB - synthesis, characterization, and low-temperature crystal structures of a family of group 4 complexes containing different numbers of imidodithiodiphosphinate ligands and different metal oxidation states is presented. Their catalytic activity in the polymerization of ethylene and propylene was studied. For ethylene, when these complexes are activated with methylalumoxane (MAO), they are active catalysts in the polymerization producing extremely high molecular weight, high-density polyethylene with very narrow polydispersities. However, for propylene, the activity of these complexes is low, producing only atactic polypropylene. The bis(imidodithiodiphosphinate) titanium(bis(amido)) complex 6e has a singular reactivity, which upon heating forms the corresponding imido complex with the concomitant elimination of Et3N and the formation of the homoleptic complex tris(imidodithiodiphosphinate) titanium(III) (6h).

UR - http://www.scopus.com/inward/record.url?scp=65649116905&partnerID=8YFLogxK

U2 - 10.1021/om801176a

DO - 10.1021/om801176a

M3 - 文章

AN - SCOPUS:65649116905

SN - 0276-7333

VL - 28

SP - 2391

EP - 2400

JO - Organometallics

JF - Organometallics

IS - 8

ER -