Issue 52, 2017

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

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

Supplementary files

Article information

Article type
Communication
Submitted
04 Apr 2017
Accepted
03 Jun 2017
First published
06 Jun 2017

Chem. Commun., 2017,53, 7068-7071

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, 53, 7068 DOI: 10.1039/C7CC02585H

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