Hydrosilylation of Allyl Ethers in the Presence of Supported Sulfur-Containing Platinum(II) Complexes
作者:D. A. de Vekki、M. A. Il’ina、N. K. Skvortsov
DOI:10.1134/s107036321801005x
日期:2018.1
Hydrosilylation of allyl ethyl, allyl butyl, allyl glycidyl, allyl benzyl, and allyl phenyl ethers by 1,1,3,3-tetramethyldisiloxane in the presence of supported sulfur-containing platinum(II) complexes with the general formula [SiO2}O2Si(Me)(CH2)3SR]2PtCl2 (R = Bu, Hex, Bn; SiO2} is silica surface) and side processes have been studied.
Preparation of platinum(II) sulfide complexes immobilized on silica
作者:D. A. de Vekki、M. A. Il’ina
DOI:10.1134/s1070363214080246
日期:2014.8
We report on preparation of silica-immobilized platinum(II) complexes of the [SiO2}O2Si(CH3)· (CH2)3SR]2PtCl2 type (R = Bu, Hex, or Bn; SiO2} = silica surface).
Spectral study of interaction between allyl ethers and hydrosiloxanes
作者:M. A. Il’ina、D. A. de Vekki、N. K. Skvortsov
DOI:10.1134/s1070363214010095
日期:2014.1
Interaction of allyl ethers with hydrosiloxanes in the presence of metal complexes has been investigated by spectral methods (H-1 NMR, IR, and GC-MS) as well as by gas-liquid chromatography. It has been shown that the anti-Markovnikov addition predominantly occurs in the studied cases; disproportionation of siloxanes and migration of double bond in the ethers have been identified as side reactions. The tendency to enter the side reactions has decreased in the following series: (HMeSiO)(4) > HMe2Si(OSiMe2)(2)H a parts per thousand HMe2SiOSiMe3 > (HMe2Si)(2)O > (Me3SiOSiMeH)(2)O. The general scheme of disproportionation of siloxanes HMe2Si(OSiMe2) (n) H (n a parts per thousand yen 1) has been proposed. According to mass spectrometry data, the silicon-containing fragment majorly contributes to the fragmentation of hydrosilylation products. Fragmentation of the gamma,gamma-adducts is similar to that of gamma-adducts. The predominant direction of fragmentation in the products of beta,gamma-addition of HMe2Si(OSiMe2)nH (n = 1-3) to allyl ethers is determined by fragmentation of the gamma-component of the molecule. The scheme of fragmentation of the hydrosilylation products ions has been proposed.