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Single site silica supported tetramethyl niobium by the SOMC strategy: synthesis, characterization and structure–activity relationship in the ethylene oligomerization reaction

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Abstract

A silica supported tetramethyl niobium complex [([triple bond, length as m-dash]SiO)NbMe4] 2 has been isolated by the surface alkylation of [([triple bond, length as m-dash]SiO–)NbCl3Me] 1 with dimethyl zinc in pentane. 1 can be easily synthesized by grafting NbCl3Me2 onto the surface of partially dehydroxylated silica by the SOMC strategy. Precise structural analysis was carried out using FTIR, advanced solid state NMR, elemental analysis and mass balance techniques (gas quantification after treating 2 with degassed water). Complex 1 was found to be active in the ethylene oligomerization reaction, producing up to C30, whereas to our surprise complex 2 selectively dimerized ethylene into 1-butene in the absence of a co-catalyst at the same conversion level.

Graphical abstract: Single site silica supported tetramethyl niobium by the SOMC strategy: synthesis, characterization and structure–activity relationship in the ethylene oligomerization reaction

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Publication details

The article was received on 04 Apr 2017, accepted on 03 Jun 2017 and first published on 06 Jun 2017


Article type: Communication
DOI: 10.1039/C7CC02585H
Citation: Chem. Commun., 2017, Advance Article
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    Single site silica supported tetramethyl niobium by the SOMC strategy: synthesis, characterization and structure–activity relationship in the ethylene oligomerization reaction

    A. Hamieh, R. Dey, B. Nekoueishahraki, M. K. Samantaray, Y. Chen, E. Abou-Hamad and J. Basset, Chem. Commun., 2017, Advance Article , DOI: 10.1039/C7CC02585H

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