New sterically hindered unbridged zirconocene complexes with 1,2-diphenylcyclopentadienyl ligands: synthesis, structure and properties as olefin polymerization catalysts. Zhang, F., Mu, Y., Zhao, L., Zhang, Y., Bu, W., Chen, C., Zhai, H., & Hong, H. Journal of Organometallic Chemistry, 613(1):68–76, 2000. ![New sterically hindered unbridged zirconocene complexes with 1,2-diphenylcyclopentadienyl ligands: synthesis, structure and properties as olefin polymerization catalysts [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex New unbridged zirconocene complexes, bis(1,2-diphenylcyclopentadienyl)zirconium dichloride (3) and bis(4-methy-1,2-diphenylcyclopentadienyl)zirconium dichloride (4) have been synthesized in high yield by reaction of ZrCl4 with the lithium salt of 1,2-diphenylcyclopentadiene (1) or 4-methyl-1,2-diphenylcyclopentadiene (2), respectively. X-ray crystallographic analysis reveals both complexes are in racemic-like conformation with near C2 symmetry in solid state. When activated with methylaluminoxane (MAO), 3 and 4 exhibit moderate catalytic activities for ethylene polymerization at relatively low Al:Zr ratios, producing high molecular weight (\textgreater106) polyethylenes with high melting transition temperatures. Atactic propylene oligomers with average molecular weight of ∼103 g mol−1 were produced by both 3 and 4 at relatively high catalytic activities upon activation with MAO.
@article{zhang_new_2000,
title = {New sterically hindered unbridged zirconocene complexes with 1,2-diphenylcyclopentadienyl ligands: synthesis, structure and properties as olefin polymerization catalysts},
volume = {613},
url = {http://dx.doi.org/10.1016/S0022-328X(00)00498-8},
doi = {10.1016/S0022-328X(00)00498-8},
abstract = {New unbridged zirconocene complexes, bis(1,2-diphenylcyclopentadienyl)zirconium dichloride (3) and bis(4-methy-1,2-diphenylcyclopentadienyl)zirconium dichloride (4) have been synthesized in high yield by reaction of ZrCl4 with the lithium salt of 1,2-diphenylcyclopentadiene (1) or 4-methyl-1,2-diphenylcyclopentadiene (2), respectively. X-ray crystallographic analysis reveals both complexes are in racemic-like conformation with near C2 symmetry in solid state. When activated with methylaluminoxane (MAO), 3 and 4 exhibit moderate catalytic activities for ethylene polymerization at relatively low Al:Zr ratios, producing high molecular weight ({\textgreater}106) polyethylenes with high melting transition temperatures. Atactic propylene oligomers with average molecular weight of ∼103 g mol−1 were produced by both 3 and 4 at relatively high catalytic activities upon activation with MAO.},
number = {1},
journal = {Journal of Organometallic Chemistry},
author = {Zhang, Fan and Mu, Ying and Zhao, Ligang and Zhang, Yuetao and Bu, Weiming and Chen, Congxi and Zhai, Huimin and Hong, Han},
year = {2000},
keywords = {catalyst, ligand, modification, olefin, polymerization, zirconocene},
pages = {68--76},
}
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X-ray crystallographic analysis reveals both complexes are in racemic-like conformation with near C2 symmetry in solid state. When activated with methylaluminoxane (MAO), 3 and 4 exhibit moderate catalytic activities for ethylene polymerization at relatively low Al:Zr ratios, producing high molecular weight (\\textgreater106) polyethylenes with high melting transition temperatures. Atactic propylene oligomers with average molecular weight of ∼103 g mol−1 were produced by both 3 and 4 at relatively high catalytic activities upon activation with MAO.","number":"1","journal":"Journal of Organometallic Chemistry","author":[{"propositions":[],"lastnames":["Zhang"],"firstnames":["Fan"],"suffixes":[]},{"propositions":[],"lastnames":["Mu"],"firstnames":["Ying"],"suffixes":[]},{"propositions":[],"lastnames":["Zhao"],"firstnames":["Ligang"],"suffixes":[]},{"propositions":[],"lastnames":["Zhang"],"firstnames":["Yuetao"],"suffixes":[]},{"propositions":[],"lastnames":["Bu"],"firstnames":["Weiming"],"suffixes":[]},{"propositions":[],"lastnames":["Chen"],"firstnames":["Congxi"],"suffixes":[]},{"propositions":[],"lastnames":["Zhai"],"firstnames":["Huimin"],"suffixes":[]},{"propositions":[],"lastnames":["Hong"],"firstnames":["Han"],"suffixes":[]}],"year":"2000","keywords":"catalyst, ligand, modification, olefin, polymerization, zirconocene","pages":"68–76","bibtex":"@article{zhang_new_2000,\n\ttitle = {New sterically hindered unbridged zirconocene complexes with 1,2-diphenylcyclopentadienyl ligands: synthesis, structure and properties as olefin polymerization catalysts},\n\tvolume = {613},\n\turl = {http://dx.doi.org/10.1016/S0022-328X(00)00498-8},\n\tdoi = {10.1016/S0022-328X(00)00498-8},\n\tabstract = {New unbridged zirconocene complexes, bis(1,2-diphenylcyclopentadienyl)zirconium dichloride (3) and bis(4-methy-1,2-diphenylcyclopentadienyl)zirconium dichloride (4) have been synthesized in high yield by reaction of ZrCl4 with the lithium salt of 1,2-diphenylcyclopentadiene (1) or 4-methyl-1,2-diphenylcyclopentadiene (2), respectively. 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Atactic propylene oligomers with average molecular weight of ∼103 g mol−1 were produced by both 3 and 4 at relatively high catalytic activities upon activation with MAO.},\n\tnumber = {1},\n\tjournal = {Journal of Organometallic Chemistry},\n\tauthor = {Zhang, Fan and Mu, Ying and Zhao, Ligang and Zhang, Yuetao and Bu, Weiming and Chen, Congxi and Zhai, Huimin and Hong, Han},\n\tyear = {2000},\n\tkeywords = {catalyst, ligand, modification, olefin, polymerization, zirconocene},\n\tpages = {68--76},\n}\n\n","author_short":["Zhang, F.","Mu, Y.","Zhao, L.","Zhang, Y.","Bu, W.","Chen, C.","Zhai, H.","Hong, H."],"key":"zhang_new_2000","id":"zhang_new_2000","bibbaseid":"zhang-mu-zhao-zhang-bu-chen-zhai-hong-newstericallyhinderedunbridgedzirconocenecomplexeswith12diphenylcyclopentadienylligandssynthesisstructureandpropertiesasolefinpolymerizationcatalysts-2000","role":"author","urls":{"Paper":"http://dx.doi.org/10.1016/S0022-328X(00)00498-8"},"keyword":["catalyst","ligand","modification","olefin","polymerization","zirconocene"],"metadata":{"authorlinks":{}},"html":""},"bibtype":"article","biburl":"https://bibbase.org/zotero/kjelljorner","dataSources":["64RFiGdCa5JLg5kLH"],"keywords":["catalyst","ligand","modification","olefin","polymerization","zirconocene"],"search_terms":["new","sterically","hindered","unbridged","zirconocene","complexes","diphenylcyclopentadienyl","ligands","synthesis","structure","properties","olefin","polymerization","catalysts","zhang","mu","zhao","zhang","bu","chen","zhai","hong"],"title":"New sterically hindered unbridged zirconocene complexes with 1,2-diphenylcyclopentadienyl ligands: synthesis, structure and properties as olefin polymerization catalysts","year":2000}