Modification of olefin polymerization catalysts: II. A 29Si NMR study on the complexation of silyl ethers with triethylaluminium
作者： Pekka Sormunen , Eero Iiskola , Eila Vähäsarja , Tuula T. Pakkanen , Tapani A. Pakkanen
DOI: 10.1016/S0022-328X(00)99605-0
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摘要: Abstract The effect of complexation with a Lewis acid, AlEt 3 , and alkylation on the chemical shift silyl ethers has been studied using 29 Si NMR spectroscopy. substitution methoxy group for an ethyl shifts signal average by 36.9 ppm to lower field, complexed ether is usually shifted field compared that uncomplexed ether, varying between − 1.4 18.1 ppm. Dynamic processes have observed some spectra; this interpreted in terms competition Al acceptors several simultaneous present.
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Stanislaw Pasynkiewicz, Lech Kozerski, Bartolomiei Grabowski, Reaction of triethylaluminium with esters Journal of Organometallic Chemistry. ,vol. 8, pp. 233- 238 ,(1967) , 10.1016/S0022-328X(00)91035-0
R.J.P. Corriu, G.F. Lanneau, G.L. Royo, Synthèse et stéréochimie d'un organosilane asymétrique bifonctionnel. Préparation de nouveaux composés organosiliciés optiquiment actifs Journal of Organometallic Chemistry. ,vol. 35, pp. 35- 49 ,(1972) , 10.1016/S0022-328X(00)86881-3
Robert A. Benkeser, Herbert Landesman, Donald J. Foster, The Formation of Arylsilylpotassium Compounds Journal of the American Chemical Society. ,vol. 74, pp. 648- 650 ,(1952) , 10.1021/JA01123A019
R.K. Harris, B.J. Kimber, 29Si and 13C Nuclear magnetic resonance studies of organosilicon chemistry: IV. Spin-lattice relaxation and motional effects in compounds containing phenyl groups Advances in Molecular Relaxation Processes. ,vol. 8, pp. 23- 35 ,(1976) , 10.1016/0001-8716(76)80004-1
Jan Schraml, Václav Chvalovský, Märt Mägi, Endel Lippmaa, Silicon-29 and carbon-13 NMR spectra of model alkylsilanes of the type (CH3)3-nXnSi(CH2)mH Collection of Czechoslovak Chemical Communications. ,vol. 44, pp. 854- 865 ,(1979) , 10.1135/CCCC19790854