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本文报导聚-γ-(乙二胺基)丙基硅氧烷钯络合物的合成及其对1-己烯、硝基苯、苯乙烯、丙烯腈等不同底物的氢化,探讨不同溶剂、温度、载体等对催化活性的影响。实验结果表明,在甲醇溶剂中和一个氢压下20毫克分子的苯乙烯在含有0.0146毫克原子钯存在下(钯络合物Ⅰ)于40℃35分钟内可氢化90%。它的选择性也是明显的。各种溶剂对氢化活性的影响大致为:(底物硝基苯)甲醇>DMF>异丙醇>THF>丙酮>苯。以二氧化硅为载体制备的钯络合物的催化活性优于三氧化二铝、硅镁吸附剂的钯络合物。催化剂通过简单回收可再用,活性略有降低。
This paper reports the synthesis of poly-γ- (ethylenediamino) propylsiloxane palladium complexes and their hydrogenation of different substrates such as 1-hexene, nitrobenzene, styrene, acrylonitrile, , Temperature, carrier, etc. on the catalytic activity. The experimental results show that 20 mg of styrene in a methanol solvent and under a hydrogen pressure can be hydrogenated by 90% in 35 minutes at 40 ° C in the presence of palladium containing 0.0146 mg of palladium (palladium complex I). Its selectivity is also obvious. The influence of various solvents on hydrogenation activity is roughly: (substrate nitrobenzene) methanol> DMF> isopropanol> THF> acetone> benzene. The catalytic activity of the palladium complexes prepared on silica supports is superior to the palladium complexes of alumina and silica-magnesium adsorbents. The catalyst is slightly reusable by simple recovery and slightly reduced.