6255-38-5Relevant academic research and scientific papers
Exploring the reactivity of tungsten bis(imido) dimethyl complexes with methyl aluminium reagents: Implications for ethylene dimerization
Wright, William R. H.,Batsanov, Andrei S.,Howard, Judith A. K.,Tooze, Robert P.,Hanton, Martin J.,Dyer, Philip W.
experimental part, p. 7038 - 7045 (2010/09/06)
The reaction of [WCl2(NAr)2(DME)] (1) with excess Me3Al affords the dimethyl complex [WMe2(N{Ar}AlMe 2{μ-Cl})(NAr)] (2), which on treatment with THF or MeAlCl 2 yields [WMe2(NAr)2(THF)] (3) and [WMe 2(N{Ar}AlMe(Cl){μ-Cl})(NAr)] (5), respectively. Complex 3 is unstable in solution dissociating to form [WMe2(NAr)2] (4) that may be isolated as an adduct with PMe3, [WMe 2(NAr)2(PMe3)] (6). While complex 2 is inert towards ethylene, complex 3 reacts rapidly to afford a mixture of methane and but-1-ene (1:4). Neither complex 2 nor 3 react with propylene. Reaction of 3 with a C2H4/C2D4 (1:1) affords a mixture of isotopomers that is consistent with complete isotopic scrambling. The structures of complexes 1, 2, and 3 have been determined by X-ray diffraction. The Royal Society of Chemistry 2010.
Reaction of n-Butenes on Nickel Films
Ledoux, Marc J.,Gault, Francois G.,Boughy, Alain,Roussy, Georges
, p. 1547 - 1561 (2007/10/02)
The reactions on nickel films of all three butenes (exchange, double-bond migration and cis-trans isomerization) were investigated at 0-20 deg C in the presence of C3D6 and at -84 deg C in the presence of D2.Analyses of the reaction products were made by mass spectrometry and microwave spectroscopy.The hyperfine distributions of the and but-1-enes obtained by exchange suggest a vinylic-type dissociative mechanism (Farkas mechanism).Cis-trans isomerization takes place either by an associative Horiuti-Polyani mechanism or by a direct process without deuterium incorporation.Three reaction mechanisms account for double-bond migration: intramolecular hydrogen shift, associative mechanism and allylic mechanism.The latter involves a number of interconversions between ?-olefinic and ?-allylic adsorbed species and yields multideuterated molecules.The above reaction mechanisms may be classified into three groups, according to their activation energies, and are believed to occur on three different types of sites with different coordination numbers.This view is supported by the changes in reaction mechanisms that result from film modification.
