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

Author(s) Hamieh, A.; Dey, R.; Nekoueishahraki, B.; Samantaray, M.K.; Chen, Y.; Abou-Hamad, E.; Basset, J.M.
Journal Chem Commun (Camb)
Date Published 2017 Jun 27
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.

DOI 10.1039/c7cc02585h
ISSN 1364-548X
Citation Hamieh A, Dey R, Nekoueishahraki B, Samantaray MK, Chen Y, Abou-Hamad E, et al. Single site silica supported tetramethyl niobium by the SOMC strategy: synthesis, characterization and structure-activity relationship in the ethylene oligomerization reaction. Chem Commun (Camb). 2017;53(52):7068-7071.

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