Influence of the order of introduction of protonic acids on the formation of active complexes in the Ni(PPh3)4/BF3 • OEt2 catalytic system

V. V. Saraev; P. B. Kraikivskii; D. A. Matveev; A. I. Vil'ms; S. N. Zelinskii; K. Lammertsma

doi:10.1134/S0023158406050077

Influence of the order of introduction of protonic acids on the formation of active complexes in the Ni(PPh₃)₄/BF₃ • OEt₂ catalytic system

V. V. Saraev, P. B. Kraikivskii, D. A. Matveev, A. I. Vil'ms, S. N. Zelinskii, K. Lammertsma

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

The influence of the order of introduction of promoters (complex protonic acids) on the formation of active complexes in the Ni(PPh₃) ₄/BF₃ • OEt₂ catalytic system and the activity of these systems in ethylene oligomerization have been studied. The activity of the systems in which nickel exists mainly as cationic Ni(I) complexes is more than one order of magnitude higher than the activity of the systems where nickel exists mainly in the form of Ni(II) hydride complexes. The role of alcohols as promoters in the Ni(PPh₃)₄/BF ₃ • OEt₂ catalytic system is elucidated. The alcohols are the source of Ni(II) hydrides and, more importantly, the source of strong Brønsted acids, which efficiently ensure the coordinative unsaturation of the cationic Ni(I) complexes.

Original language	English
Pages (from-to)	699-703
Number of pages	5
Journal	Kinetics and Catalysis
Volume	47
Issue number	5
DOIs	https://doi.org/10.1134/S0023158406050077
Publication status	Published - Oct 2006
Externally published	Yes

ASJC Scopus subject areas

Catalysis
General Chemistry
Modeling and Simulation
Computer Science Applications

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title = "Influence of the order of introduction of protonic acids on the formation of active complexes in the Ni(PPh3)4/BF3 • OEt2 catalytic system",

abstract = "The influence of the order of introduction of promoters (complex protonic acids) on the formation of active complexes in the Ni(PPh3) 4/BF3 • OEt2 catalytic system and the activity of these systems in ethylene oligomerization have been studied. The activity of the systems in which nickel exists mainly as cationic Ni(I) complexes is more than one order of magnitude higher than the activity of the systems where nickel exists mainly in the form of Ni(II) hydride complexes. The role of alcohols as promoters in the Ni(PPh3)4/BF 3 • OEt2 catalytic system is elucidated. The alcohols are the source of Ni(II) hydrides and, more importantly, the source of strong Br{\o}nsted acids, which efficiently ensure the coordinative unsaturation of the cationic Ni(I) complexes.",

author = "Saraev, {V. V.} and Kraikivskii, {P. B.} and Matveev, {D. A.} and Vil'ms, {A. I.} and Zelinskii, {S. N.} and K. Lammertsma",

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AU - Saraev, V. V.

AU - Kraikivskii, P. B.

AU - Matveev, D. A.

AU - Vil'ms, A. I.

AU - Zelinskii, S. N.

AU - Lammertsma, K.

PY - 2006/10

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AB - The influence of the order of introduction of promoters (complex protonic acids) on the formation of active complexes in the Ni(PPh3) 4/BF3 • OEt2 catalytic system and the activity of these systems in ethylene oligomerization have been studied. The activity of the systems in which nickel exists mainly as cationic Ni(I) complexes is more than one order of magnitude higher than the activity of the systems where nickel exists mainly in the form of Ni(II) hydride complexes. The role of alcohols as promoters in the Ni(PPh3)4/BF 3 • OEt2 catalytic system is elucidated. The alcohols are the source of Ni(II) hydrides and, more importantly, the source of strong Brønsted acids, which efficiently ensure the coordinative unsaturation of the cationic Ni(I) complexes.

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Influence of the order of introduction of protonic acids on the formation of active complexes in the Ni(PPh₃)₄/BF₃ • OEt₂ catalytic system

Abstract

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