Molecular structure, magnetic properties and catalytic activity in selective ethylene dimerization of nickel (II) complexes with bis(3,5-dimethylpyrazol-1-yl)methane

Nickel(II) complexes with neutral bidentate nitrogen-containing ligands are of great interest as promising precatalysts for the selective oligomerization of ethylene. Complexes of compositions 0.75[LNiCl2]2•0.25[LNiClBr]2 2 and LNiBr2 3 where L = bis-(3,5-dimethylpyrazol-1-yl)methane have been synthesized and characterized by single crystal X-ray diffraction, IR and 1H NMR spectroscopies and elemental analysis. The 1H NMR spectra of paramagnetic complexes indicate that the structures of these complexes in solution are similar to ones in the solid state. Magnetic susceptibility of the compounds has been investigated and discussed in the context of their structures. Treatment of these complexes with diethylaluminum chloride (DEAC) or ethylaluminum sesquichloride (EASC) generates active catalysts that oligomerize ethylene to yield mostly butenes with activities up to 930 kg(oligomers)·mol[Ni]−1·h−1 (DEAC). © 2020 Elsevier B.V.

Авторы
Zubkevich S.V.1 , Tuskaev V.A.1, 2 , Gagieva S.C.1 , Pavlov A.A.2 , Khrustalev V.N. 3, 4 , Zarubin D.N.2 , Kurmaev D.A.1 , Kolosov N.A.1 , Bulychev B.M.1
Язык
Английский
Статус
Опубликовано
Номер
127692
Том
1206
Год
2020
Организации
  • 1 Moscow State University, Chemical Department, Leninskie Gory 11, Moscow, 119991, Russian Federation
  • 2 A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova St., 28, Moscow, 119334, Russian Federation
  • 3 National Research Center “Kurchatov Institute”, Acad. Kurchatov Sq., 1, Moscow, 123182, Russian Federation
  • 4 Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklay St., 6, Moscow, 117198, Russian Federation
Ключевые слова
Bispyrazolylmethane; Ethylene; Nickel; Nickel complexes; Oligomerization
Дата создания
10.02.2020
Дата изменения
10.02.2020
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/56497/