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Formation of Trivalent Zirconocene Complexes from ansa-Zirconocene-Based Olefin-Polymerization Precatalysts: An EPR- and NMR-Spectroscopic Study Научная публикация

Журнал Journal of the American Chemical Society
ISSN: 0002-7863 , E-ISSN: 1520-5126
Вых. Данные Год: 2013, Том: 135, Номер: 9, Страницы: 10710-10719 Страниц : 10 DOI: 10.1021/ja403170u
Ключевые слова Chlorine compounds; Organometallics; Positive ions; Spectroscopic analysis; Zirconium
Авторы Lenton Taylor N. 1 , Bercaw John E. 1 , Panchenko Valentina N. 2 , Zakharov Vladimir A. 2 , Babushkin Dmitrii E. 2 , Soshnikov Igor E. 2 , Talsi Evgenii P. 2 , Brintzinger Hans H. 3
Организации
1 Arnold and Mabel Beckman Laboratories of Chemical Synthesis, California Institute of Technology, Pasadena, California 91125, United States
2 Boreskov Institute of Catalysis, Russian Academy of Science, Siberian Branch, Pr. Lavrentieva 5, 630090 Novosibirsk, Russian Federation
3 Fachbereich Chemie, Universitat Konstanz, D-78457 Konstanz, Germany

Информация о финансировании (4)

1 Российский фонд фундаментальных исследований 10-03-91330
2 German Research Foundation Me 1388/9-1
3 National Science Foundation CHE-0639094
4 United States Department of Energy DE-FG03-85ER13431

Реферат: Reduction of Zr(IV) metallocenium cations with sodium amalgam (NaHg) produces EPR signals assignable to Zr(III) metallocene complexes. The chloro-bridged heterodinuclear ansa-zirconocenium cation [(SBI)Zr(μ-Cl)2AlMe2]+ (SBI = rac-dimethylsilylbis(1-indenyl)), present in toluene solution as its B(C6F5)4– salt, thus gives rise to an EPR signal assignable to the complex (SBI)ZrIII(μ-Cl)2AlMe2, while (SBI)ZrIII-Me and (SBI)ZrIII(μ-H)2AliBu2 are formed by reduction of [(SBI)Zr(μ-Me)2AlMe2]+ B(C6F5)4– and [(SBI)Zr(μ-H)3(AliBu2)2]+ B(C6F5)4–, respectively. These products can also be accessed, along with (SBI)ZrIII-iBu and [(SBI)ZrIII]+ AlR4–, when (SBI)ZrMe2 is allowed to react with HAliBu2, eliminating isobutane en route to the Zr(III) complex. Further studies concern interconversion reactions between these and other (SBI)Zr(III) complexes and reaction mechanisms involved in their formation.
Библиографическая ссылка: Lenton T.N. , Bercaw J.E. , Panchenko V.N. , Zakharov V.A. , Babushkin D.E. , Soshnikov I.E. , Talsi E.P. , Brintzinger H.H.
Formation of Trivalent Zirconocene Complexes from ansa-Zirconocene-Based Olefin-Polymerization Precatalysts: An EPR- and NMR-Spectroscopic Study
Journal of the American Chemical Society. 2013. V.135. N9. P.10710-10719. DOI: 10.1021/ja403170u WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
Поступила в редакцию: 29 мар. 2013 г.
Опубликована online: 10 июл. 2013 г.
Опубликована в печати: 24 июл. 2013 г.
Идентификаторы БД:
Web of science: WOS:000322432400024
Scopus: 2-s2.0-84880842120
РИНЦ: 20449268
Chemical Abstracts: 2013:904141
Chemical Abstracts (print): 159:229689
OpenAlex: W2168136167
Цитирование в БД:
БД Цитирований
Web of science 33
Scopus 34
РИНЦ 33
OpenAlex 38
Альметрики: