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在选定毛细管柱温,载气流量、分流比、注入口和FID的温度等色谱条件下,分析了对环芳烷(PCP)二氯化产物的组成。定性分析结果表明,PCP二氯化产物除主要组分是二氯对环芳烷(DCPCP)外,还含少量的一氯对环芳烷(MCPCP)和三氯对环芳烷(TCPCP);DCPCP的色谱图上出现了3个明显的色谱峰,证明3种异构体相对含量较高。用丙酮-石油醚混合溶剂分离去除 物得到了纯度为99.1%的DCPCP。以邻苯二甲酸二丁酯为内标物,测定了DCPCP对内标物的相对质量校正因子。按内标法定量分析了PCP二氯化产物各组分的含量,对DCPCP分析的相对标准偏差小于3%。 相似文献
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高分子负载锰卟啉的合成及其催化烯烃环氧化反应研究 总被引:8,自引:0,他引:8
本文用羟基取代四苯基卟啉锰通过醚键与聚苯乙烯树脂键联,合成了一类高分子负载化锰卟啉化合物。经ESR、IR、UV-vis散射光谱等测定证实其结构。本文同时考察了它们对烯烃环氧化反应的催化活性,结果表明,负载化金属卟啉在催化烯烃环氧化反应中能集均相和多相催化的优点于一体,不仅催化剂稳定性增强,而且易于分离和重复使用。 相似文献
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Ag-TiO2纳米催化剂的制备、表征及环氧化催化性能 总被引:3,自引:0,他引:3
环氧化合物是一类重要的有机合成中间体。工业上环氧乙烷是以Ag SrO CaO作催化剂 ,通过多相催化由乙烯和氧气氧化得到 ,其它的C2以上烯烃不能用该法生产 ,因为反应温度高 ,选择性很差。高温下的银催化乙烯的分子氧环氧化 ,选择性高于 80 % ,而用于丙烯的环氧化时 ,选择性大大降低[1] ,银多相催化分子氧环氧化烯烃的研究较活跃[2 5] 。本文合成了Ag TiO2 纳米催化剂 ,对其进行了表征 ,并初步研究了其环氧化催化性能。1 实验部分1 .1 仪器药品TestscanShimadzuFTIR 80 0 0series红外光谱仪 (KB… 相似文献
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研究了以羧酸酐和羟基芳磺酸盐为主要原料,丙酮为溶剂、无水碳酸钠为缚酸剂的烷酰氧基芳磺酸盐的清洁合成工艺,制备了4-壬酰氧基苯磺酸钠(NOBS)、壬酰氧基尼文酸钠、4-甲基丙烯酰氧基苯磺酸钠、甲基丙烯酰氧基尼文酸钠等4个化合物.考察了合成反应的影响因素.结果表明,以对羟基苯磺酸钠和壬酸酐为原料合成4-壬酰氧基苯磺酸钠(N... 相似文献
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Concerning the question of transanular II-II-interactions in [2.2]metacyclophane, [2.2]paracyclophane and 2,2′-spirobiindane.From the quotient of the two dissociation constants (K1/K2) of [2.2]metacyclophane-bis-chromtricarbonyl (9·0 ± 1·9) it was concluded that there are no transanular II-II-interactions between the two benzene rings. The corresponding values for the bis-chromtricarbonyl-complexes of 2,2′-spirobiindane and [2.2]paracyclophane are 8·0 ± 1·5 and 104, resp. These results are supported by IR-spectroscopical data of the CO-frequencies of the Cr(CO)3-complexes of [2.2]metacyclophane and some derivatives, of 2,2′-spirobiindane and [2.2]paracyclophane.Moreover, UV-spectroscopic studies of tetracyanoethylene complexes of arenes are shown to be insignificant with regard to transanular II-II-interactions. 相似文献
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Dolbier WR Xie P Zhang L Xu W Chang Y Abboud KA 《The Journal of organic chemistry》2008,73(6):2469-2472
A synthesis of perfluoro[2.2]paracyclophane has been sought ever since the partially fluorinated octafluoro[2.2]paracyclophane (AF4) was prepared and its chemistry studied. This compound has now been prepared in 39% yield from the precursor, 1,4-bis(chlorodifluoromethyl)-2,3,5,6-tetrafluorobenzene by its reaction with Zn when heated in acetonitrile at 100 degrees C. Two preparations of the precursor, first from 1,4-dicyano-2,3,5,6-tetrachlorobenzene and an improved method beginning from 1,2,4,5-tetrachlorobenzene, are also described as are key comparisons to our related synthesis of AF4. 相似文献
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Robert Filler Garry L. Cantrell Donald Wolanin Saiyid M. Naqvi 《Journal of fluorine chemistry》1986,30(4):399-414
New and improved syntheses of 4,5,7,8-tetrafluoro- and 4,5,7,8,12,13,15,16-octafluoro[2.2]paracyclophanes are described. The preparation of the new compound, 4,5,7,8-tetrafluoro[2.2]metaparacyclophane, is outlined. 相似文献
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D. Yu. Antonov E. V. Sergeeva E. V. Vorontsov V. I. Rozenberg 《Russian Chemical Bulletin》1997,46(11):1897-1900
An efficient three-step synthesis of [2.2]paracyclophane-pseudo-ortho-dicarboxylic acid by dibromination of [2.2]paracyclophane, thermal isomerization of the resultingpseudopara-dibromide topseudo-ortho-isomer, followed by lithiation/carboxylation was developed. The possibility of preparation of two other novelpseudo-ortho-disubstituted carbonyl derivatives, 4-carboxy-12-(1-oxopenthyl)-[2.2]paracyclophane and di(4-carboxy[2.2]paracyclophanyl-12)ketone,
was demonstrated when an excess of lithiation reagent (4 or 10 eq.) was used in the final step.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 2001–2004, November, 1997. 相似文献
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ZrxCe1-xO2催化剂催化湿式氧化乙酸的活性研究 总被引:1,自引:0,他引:1
采用共沉淀法制备了ZrxCe1-xO2催化剂, 利用BET, XRD和XPS对其进行了表征, 并研究了催化剂催化湿式氧化乙酸的活性. 结果表明: Zr和Ce摩尔比为1∶9的催化剂催化湿式氧化乙酸时具有最好的活性, 当乙酸溶液的初始化学需氧量(COD)为5000 mg/L, 反应温度为230 ℃, 压力为5 MPa时, 120 min后, COD的去除率为76% . 催化剂具有良好的活性是因为在CeO2中加入Zr能够增大催化剂的比表面积和表面缺陷氧的含量, 并最终加快了HO2•自由基的产生, 从而提高了催化剂的活性. 相似文献
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Oxidation of [2.2]- and [3.3]paracyclophanols with benzeneseleninic anhydride readily afforded the corresponding cyclophane-o-quinones which showed the intramolecular charge-transfer interactions. 相似文献