SOMC-Designed Silica Supported Tungsten Oxo Imidazolin-2-iminato Methyl Precatalyst for Olefin Metathesis Reactions

Ziyauddin Qureshi, Ali Imad Ali Hamieh, Samir Barman, Niladri Maity, Manoja Samantaray, Samy Ould-Chikh, Edy Abou-Hamad, Laura Falivene, Valerio D’Elia, Alexander Rothenberger, Isabelle Llorens, Jean-Louis Hazemann, Jean-Marie Basset

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Synthesis, structure, and olefin metathesis activity of a surface complex [(≡Si-O-)W(═O)(CH3)2-ImDippN] (4) (ImDipp = 1,3-bis(2,6-diisopropylphenyl)imidazolin-2-iminato) supported on silica by a surface organometallic chemistry (SOMC) approach are reported. The reaction of N-silylated 2-iminoimidazoline with tungsten(VI) oxytetrachloride generated the tungsten oxo imidazolin-2-iminato chloride complex [ImDippNW(═O)Cl3] (2). This was grafted on partially dehydroxylated silica pretreated at 700 °C (SiO2-700) to afford a well-defined monopodal surface complex [(≡Si-O-)W(═O)Cl2-ImDippN] (3). 3 underwent alkylation by ZnMe2 to produce [(≡Si-O-)W(═O)(CH3)2-ImDippN] (4). The alkylated surface complex was thoroughly characterized by solid-state NMR, elemental microanalysis, Raman, FT-IR spectroscopies, and XAS analysis. 4 proved to be an active precatalyst for self-metathesis of terminal olefins such as propylene and 1-hexene.
Original languageEnglish (US)
Pages (from-to)861-871
Number of pages11
JournalInorganic Chemistry
Volume56
Issue number2
DOIs
StatePublished - Jan 5 2017

Fingerprint

Dive into the research topics of 'SOMC-Designed Silica Supported Tungsten Oxo Imidazolin-2-iminato Methyl Precatalyst for Olefin Metathesis Reactions'. Together they form a unique fingerprint.

Cite this