Surface organometallic chemistry: A route to well-defined boron heterogeneous co-catalyst for olefin polymerisation

Nicolas Millot; Catherine C. Santini; Frédéric Lefebvre; Jean Marie Basset

doi:10.1016/j.crci.2004.03.011

Surface organometallic chemistry: A route to well-defined boron heterogeneous co-catalyst for olefin polymerisation

Nicolas Millot, Catherine C. Santini^*, Frédéric Lefebvre, Jean Marie Basset

^*Corresponding author for this work

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

30 Scopus citations

Abstract

The reaction of tris(pentafluorophenyl)borane, B(C₆F₅)₃ with surface silanol (≡Si-OH) of silica occurs only in the presence of a Brønsted base (diethylaniline, Et₂NPh), which does not form a complex with B(C₆F₅)₃, and affords selectively a well-defined ionic entity [≡SiO-B(C₆F₅)₃]^- [HNEt₂Ph]⁺. With a strong nucleophile base such as pyridine (C₅H₅N), the complex (C₆F₅)₃B.NC₅H₅ is formed and is only physisorbed onto silica surface. Without a base, B(C₆F₅)₃ does not react with (≡Si-OH), and is only physisorbed. On the contrary, with any molecular compound ROH, B(C₆F₅)₃ forms a stable complex (C₆F₅)₃ḂO(H)R.

Original language	English (US)
Pages (from-to)	725-736
Number of pages	12
Journal	Comptes Rendus Chimie
Volume	7
Issue number	8-9
DOIs	https://doi.org/10.1016/j.crci.2004.03.011
State	Published - Aug 2004
Externally published	Yes

Keywords

Diethylaniline
Heterogeneous anions
Polymerisation co-catalyst
Silica
Tris(pentafluorophenyl)borane

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering

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10.1016/j.crci.2004.03.011

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@article{bcf09bce3e124d58a070e1d343c80037,

title = "Surface organometallic chemistry: A route to well-defined boron heterogeneous co-catalyst for olefin polymerisation",

abstract = "The reaction of tris(pentafluorophenyl)borane, B(C6F5)3 with surface silanol (≡Si-OH) of silica occurs only in the presence of a Br{\o}nsted base (diethylaniline, Et2NPh), which does not form a complex with B(C6F5)3, and affords selectively a well-defined ionic entity [≡SiO-B(C6F5)3]- [HNEt2Ph]+. With a strong nucleophile base such as pyridine (C5H5N), the complex (C6F5)3B.NC5H5 is formed and is only physisorbed onto silica surface. Without a base, B(C6F5)3 does not react with (≡Si-OH), and is only physisorbed. On the contrary, with any molecular compound ROH, B(C6F5)3 forms a stable complex (C6F5)3ḂO(H)R.",

keywords = "Diethylaniline, Heterogeneous anions, Polymerisation co-catalyst, Silica, Tris(pentafluorophenyl)borane",

author = "Nicolas Millot and Santini, {Catherine C.} and Fr{\'e}d{\'e}ric Lefebvre and Basset, {Jean Marie}",

year = "2004",

month = aug,

doi = "10.1016/j.crci.2004.03.011",

language = "English (US)",

volume = "7",

pages = "725--736",

journal = "Comptes Rendus Chimie",

issn = "1631-0748",

publisher = "Elsevier B.V.",

number = "8-9",

}

TY - JOUR

T1 - Surface organometallic chemistry

T2 - A route to well-defined boron heterogeneous co-catalyst for olefin polymerisation

AU - Millot, Nicolas

AU - Santini, Catherine C.

AU - Lefebvre, Frédéric

AU - Basset, Jean Marie

PY - 2004/8

Y1 - 2004/8

N2 - The reaction of tris(pentafluorophenyl)borane, B(C6F5)3 with surface silanol (≡Si-OH) of silica occurs only in the presence of a Brønsted base (diethylaniline, Et2NPh), which does not form a complex with B(C6F5)3, and affords selectively a well-defined ionic entity [≡SiO-B(C6F5)3]- [HNEt2Ph]+. With a strong nucleophile base such as pyridine (C5H5N), the complex (C6F5)3B.NC5H5 is formed and is only physisorbed onto silica surface. Without a base, B(C6F5)3 does not react with (≡Si-OH), and is only physisorbed. On the contrary, with any molecular compound ROH, B(C6F5)3 forms a stable complex (C6F5)3ḂO(H)R.

AB - The reaction of tris(pentafluorophenyl)borane, B(C6F5)3 with surface silanol (≡Si-OH) of silica occurs only in the presence of a Brønsted base (diethylaniline, Et2NPh), which does not form a complex with B(C6F5)3, and affords selectively a well-defined ionic entity [≡SiO-B(C6F5)3]- [HNEt2Ph]+. With a strong nucleophile base such as pyridine (C5H5N), the complex (C6F5)3B.NC5H5 is formed and is only physisorbed onto silica surface. Without a base, B(C6F5)3 does not react with (≡Si-OH), and is only physisorbed. On the contrary, with any molecular compound ROH, B(C6F5)3 forms a stable complex (C6F5)3ḂO(H)R.

KW - Diethylaniline

KW - Heterogeneous anions

KW - Polymerisation co-catalyst

KW - Silica

KW - Tris(pentafluorophenyl)borane

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U2 - 10.1016/j.crci.2004.03.011

DO - 10.1016/j.crci.2004.03.011

M3 - Article

AN - SCOPUS:4444225711

SN - 1631-0748

VL - 7

SP - 725

EP - 736

JO - Comptes Rendus Chimie

JF - Comptes Rendus Chimie

IS - 8-9

ER -

Surface organometallic chemistry: A route to well-defined boron heterogeneous co-catalyst for olefin polymerisation

Abstract

Keywords

ASJC Scopus subject areas

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