Catalytic Systems Based on Cp2ZrX2 (X = Cl, H), Organoaluminum Compounds and Perfluorophenylboranes: Role of Zr,Zr- and Zr,Al-Hydride Intermediates in Alkene Dimerization and Oligomerization

Catalytic Systems Based on Cp2ZrX2 (X = Cl, H), Organoaluminum Compounds and Perfluorophenylboranes: Role of Zr,Zr- and Zr,Al-Hydride Intermediates in Alkene Dimerization and Oligomerization Научная публикация

Журнал

Catalysts
ISSN: 2073-4344

Вых. Данные

Год: 2020, Том: 11, Номер: 1, Номер статьи : 39, Страниц : DOI: 10.3390/catal11010039

Авторы

Parfenova Lyudmila V. ¹ , Kovyazin Pavel V. ¹ , Bikmeeva Almira Kh. ¹ , Palatov Eldar R. ²

Организации

1	Institute of Petrochemistry and Catalysis, Russian Academy of Sciences
2	Bashkir State University

The activity and chemoselectivity of the Cp2ZrCl2-XAlBui2 (X = H, Bui) and [Cp2ZrH2]2-ClAlEt2 catalytic systems activated by (Ph3C)[B(C6F5)4] or B(C6F5)3 were studied in reactions with 1-hexene. The activation of the systems by B(C6F5)3 resulted in the selective formation of head-to-tail alkene dimers in up to 93% yields. NMR studies of the reactions of Zr complexes with organoaluminum compounds (OACs) and boron activators showed the formation of Zr,Zr- and Zr,Al-hydride intermediates, for which diffusion coefficients, hydrodynamic radii, and volumes were estimated using the diffusion ordered spectroscopy DOSY. Bis-zirconium hydride clusters of type x[Cp2ZrH2∙Cp2ZrHCl∙ClAlR2]∙yRnAl(C6F5)3−n were found to be the key intermediates of alkene dimerization, whereas cationic Zr,Al-hydrides led to the formation of oligomers.

Parfenova L.V. , Kovyazin P.V. , Bikmeeva A.K. , Palatov E.R.
Catalytic Systems Based on Cp2ZrX2 (X = Cl, H), Organoaluminum Compounds and Perfluorophenylboranes: Role of Zr,Zr- and Zr,Al-Hydride Intermediates in Alkene Dimerization and Oligomerization
Catalysts. 2020. V.11. N1. 39 . DOI: 10.3390/catal11010039 WOS Scopus OpenAlex

Web of science:	WOS:000610001800001
Scopus:	2-s2.0-85099281611
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