共查询到19条相似文献,搜索用时 593 毫秒
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4-氧杂-6,7-二氯庚基三甲氧基硅烷依次与二苯膦钾、气相法二氧化硅、三氯化铑作用,合成了聚-4-氧杂-6,7-双二苯膦基庚基硅氧烷铑配合物。它对烯烃与取代烯烃的硅氢化反应具有良好的催化活性。 相似文献
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二茂铁衍生物的金属配合物对于氢化、偶联及不对称合成的催化作用已有报道,但用于烯烃硅氢加成还只有关于手征性二茂铁膦钯配合物和聚合物负载二茂铁膦钯、膦铂配合物的研究。Macosko等曾用顺式二氯化双乙硫醚铂配合物催化聚异丁烯末端双键进行硅氢加成,我们也发现聚-4-氧杂-6,7-双甲硫基庚基硅氧烷铂配合物对于烯烃的硅氢加成反应具有良好的催化活性。因此,预期1,1′-双烷硫基二茂铁铂、铑配合物也应是烯烃硅氢加成的有效催化剂。 相似文献
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二氧化硅-聚硅氧烷负载硫杂-15-冠-5铂、铑配合物的合成及其催化硅氧化性能 总被引:1,自引:0,他引:1
6-(ω'-十一碳烯氧甲基)-1-硫杂-4,7,1O,13-四氧杂环十五烷与三乙氧基硅烷进行硅氢加成,产物依次以气相法二氧化硅固载、氯亚铂酸钾或三氯化铑络合,合成了相应的二氧化硅-聚硅氧烷负载硫杂-15-冠-5-铂、铑配合物,并研究了它们在烯烃与三乙氧基硅烷的硅氢加成反应中的催化性能.结果表明,二者均为硅氢加成反应的高效催化剂. 相似文献
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E. A. Chernyshev Z. V. Belyakova L. A. Yagodina E. V. Nikitinskii V. G. Bykovchenko 《Russian Chemical Bulletin》1998,47(10):1992-1995
The reactions of separate and competitive hydrosilylation of propylene with HSiCl3, MeSiHCl2, Me2SiHCl, and MePh2SiH in the presence of the Speier catalyst (SC) with different additives and a catalyst obtained from SC and propylene were
studied. A mutual influence of the hydrosilanes in the competitive reactions was found. The influence of various additives
to SC on the process was considered.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 2048–2051, October, 1998. 相似文献
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以氧化石墨为载体,采用二苯基膦配体对其进行改性,再利用膦配体对Pt的螯合配位作用合成了氧化石墨固载膦铂配合物催化剂(GO-P-Pt),并采用元素分析、FT-IR、XRD等方法对催化剂进行了表征,考察了催化剂催化不同烯烃与三乙氧基硅烷的硅氢加成反应性能。结果表明,该催化剂对烯烃与三乙氧基硅烷的硅氢加成反应具有良好的催化活性,在100℃,反应180min后,1-辛烯的转化率为94.6%,β-加成产物的选择性高达99.4%;当底物为芳香烯烃时,β-加成产物的选择性比脂肪烯烃低。此外,催化剂在重复使用4次之后,活性基本保持不变。 相似文献
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Christian Drohmann Martin Mller Olga B. Gorbatsevich Aziz M. Muzafarov 《Journal of polymer science. Part A, Polymer chemistry》2000,38(4):741-751
Hyperbranched polycarbosilanes were synthesized by hydrosilylation addition of methyldivinylsilane, methyldiallylsilane, triallylsilane, and methyldiundecenylsilane. Molecular mass distributions of the hyperbranched polymers were investigated upon systematic variation of the reaction conditions. The formation of hyperbranched polycarbosilanes depended strongly on the reaction conditions and the monomer structure. Although cyclization reactions impeded the build up of molecular weight, crosslinking due to rearrangement reactions caused the formation of multimodal molecular weight distributions and gelation. Crosslinking could be avoided by the appropriate choice of the reaction conditions. In the case of methyldiundecenylsilane, where the distance between the double bond and silicon atom essentially was enlarged, high molecular weight polymers with remarkably narrow molecular weight distributions were obtained; the molecular mass could be controlled by subsequent addition of further monomer. © 2000 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 38: 741–751, 2000 相似文献
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Katsuhiko Kishi Taizo Ishimaru Masayoshi Ozono Ikuyoshi Tomita Takeshi Endo 《Journal of polymer science. Part A, Polymer chemistry》2000,38(1):35-42
A new thermal latent hydrosilylation catalyst on the basis of H2PtCl6 and polystyrene derivatives having propargyl moieties is described. The polystyrene derivatives having various propargyl moieties were obtained by the reaction of propargyl alcohols with poly(p‐chloromethylstyrene) or its copolymer with styrene. The polymer‐supported platinum catalysts were prepared by aging H2PtCl6 with these polymers in tetrahydrofuran at 30 °C for 12 h. In the presence of the polymers, the hydrosilylation activity of H2PtCl6 was found to be controlled thermally in the model reaction of trimethylsilane and triethylvinylsilane. Effective control of the crosslinking reaction of silicone resin was also achieved by using these latent catalyst systems. © 2000 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 38: 35–42, 2000 相似文献
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以氧化石墨为载体,采用二苯基膦配体对其进行改性,再利用膦配体对Pt的螯合配位作用合成了氧化石墨固载膦铂配合物催化剂(GO-P-Pt),并采用元素分析、FT-IR、XRD等方法对催化剂进行了表征,考察了催化剂催化不同烯烃与三乙氧基硅烷的硅氢加成反应性能。结果表明,该催化剂对烯烃与三乙氧基硅烷的硅氢加成反应具有良好的催化活性,在100℃,反应180 min后,1-辛烯的转化率为94.6%,β-加成产物的选择性高达99.4%;当底物为芳香烯烃时,β-加成产物的选择性比脂肪烯烃低。此外,催化剂在重复使用4次之后,活性基本保持不变。 相似文献