Chromocene-Cyclopentadienyltitanium Trichloride Ion Pairs and Their Rearrangement to Titanocene Chloride-Cyclopentadienylchromium Dichlorides Ethylene Polymerization Tests
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F18%3A00492078" target="_blank" >RIV/61388955:_____/18:00492078 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/18:10376992
Result on the web
<a href="http://dx.doi.org/10.1002/ejic.201800202" target="_blank" >http://dx.doi.org/10.1002/ejic.201800202</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/ejic.201800202" target="_blank" >10.1002/ejic.201800202</a>
Alternative languages
Result language
angličtina
Original language name
Chromocene-Cyclopentadienyltitanium Trichloride Ion Pairs and Their Rearrangement to Titanocene Chloride-Cyclopentadienylchromium Dichlorides Ethylene Polymerization Tests
Original language description
Reactions of chromocene [CrCp2] (Cp = (5)-C5H5) with cyclopentadienyltitanium trichlorides [Ti((5)-C5H5-nMen)Cl-3] (n = 0-5) and [Ti(C5Me4Et)TiCl3] in toluene resulted in precipitation of ion pairs of [CrCp2](+)[Ti((5)-C5H5-nMen)Cl-3](-) (1-6) and [CrCp2](+)[Ti((5)-C5Me4Et)Cl-3](-) (7). Heating their toluene solutions to 100 degrees C yielded the titanocene chloride cyclopentadienylchromium dichloride complexes with the metals linked by bridging chloride ligands. For n = 0-3, the purple-violet complexes [CpCpTi(mu-Cl)(2)Cr(Cp)Cl] (Cp cyclopentadienyl ligand of the titanium component) (8-11) were stable at 100 degrees C, and the single-crystal structure of [Cp2Ti(mu-Cl)(2)Cr(Cp)Cl] (8) was determined. The bridging complexes of the same type for n = 4, 5 and the C5Me4Et ligand (12-14) were contaminated with titanocene dichlorides containing mixed auxiliary ligands [TiCp(C5HMe4)Cl-2] (15), [TiCp(C5Me5)Cl-2] (16), and [TiCp(C5Me4Et)Cl-2] (17), respectively. In addition, they contained the hitherto unknown (CpCrCl)(n) (18). Heating of 12-14 to 100 degrees C resulted in their decomposition to 15-17, accompanied with 18 in all cases. The molecular and electronic properties of 1, 4, 5, 8 and both isomers of 13 were investigated by DFT. Complexes 8, 9, and 11 activated with MMAO polymerized ethylene in toluene to very high molecular weights polyethylene (M-n 500 kgmol(-1)). Upon activation with B(C6F5)(3)/Et3SiH in dichloromethane they produced M-n = 9-23 kgmol(-1). The titanium species was the catalytically dominant one in both cases.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/GA17-13778S" target="_blank" >GA17-13778S: Aluminum free catalytic system utilizing hydrosilane-B(C6F5)3 adducts as activators in transition metal catalyzed ethylene polymerization</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
European Journal of Inorganic Chemistry
ISSN
1434-1948
e-ISSN
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Volume of the periodical
2018
Issue of the periodical within the volume
23
Country of publishing house
DE - GERMANY
Number of pages
11
Pages from-to
2637-2647
UT code for WoS article
000435936400004
EID of the result in the Scopus database
2-s2.0-85048853813