Study on Oxidation of Styrene Catalyzed by the Polymer-metallic Catalyst

合成系列新催化剂,在温和的条件下,以H2O2作为氧源,用于苯乙烯氧化反应.研究了所得催化剂的催化活性,探讨了配体原料组成、活性金属盐、反应温度、双氧水/苯乙烯摩尔比对苯乙烯催化氧化的影响.实验结果表明,新制得的高分子金属催化剂对苯乙烯催化氧化,生成苯乙酮具有较高的选择性.广西民族学院科研基金资助课题(编号:01HXX00003

Study on the Preparation of Cyclohexanone

以30%H2O2 为氧化剂,用FeCl3 催化氧化环己醇可得到产率(基于环己醇)为 75%以上的环己酮,反应中无须加入相转移催化剂,考察了用量、催化剂、反应时间及反应温度对产率的影响.所用催化剂价廉易得且具有极佳的水溶性,分离回收容易,是一条绿色合成环己酮的好途径,克服了目前有机化学实验教材中采用浓HNO3、KCrO4 或KMnO4 氧化法存在污染大、反应时间长等缺点.广西民族学院科研基金资助课题(01HXX00003

Exploration on the Teaching Reform of Organic Chemistry Experiments

针对传统有机化学实验课的缺点和不足,介绍了对有机化学实验课教学内容的改进,其中包括对有机化学实验课教学内容、方法的改革,突出培养和提高学生在实验过程中综合操作技巧和创新能力. To overcome the disadvantages in traditional teaching of experimental organic chemistry,improvements including teaching methods and contents for this subject have been investigated.Based on the reform,students＇ experimental skills and innovative abilities are better developed

Determination Acids in Walnut Oil by Capillary Gas Chromatography

讨论了核桃油中脂肪酸的提取方法和毛细管气相色谱法测定条件,并对5种主要脂肪酸进行定量的测定

民族院校有机化学教学改革实践与研究

有机化学是一门重要的基础课,其精品课程建设是提高教学质量和培养人才的关键。为了提高民族院校有机化学教学质量,培养学生具有创新能力,我们从教学内容、教学方法与手段等方面对有机化学教学进行了改革探讨,取得了良好的教学效果。广西民族大学基础教学示范中心教育科学专项研究课题资

一种新的高分子铑配合物的结构和性能

合成了一种新的含未配位氮和氧两种不同配位能力原子的高分子顺二羰基铑 (I)配合物—聚 2-乙烯吡啶 -顺丁烯二酸甲酯 /铑 (即 PVMRh) ,用 X射线光电子能谱 (XPS)和红外光谱 (IR)进行了跟踪分析 ,确定了 PVMRh存在的配位结构特征 ,发现这种结构特征和配合物的稳定性有密切关系 ;并在可比条件下 ,以甲醇羰基化实验对这一新配合物与现有工业催化剂的催化性能进行了比较 .国家自然科学基金资助项目!( 2 9973 0 15

Theoretical Investigation on Structure and Property of Abietic Acids in Rosin

采用从头算Hartree-Fock和密度泛函DFT方法对松香枞酸分子的几何构型进行理论计算,按最低能量原理确定其最稳定的构型。对该稳定构型的结构参数与文献报道的理论计算值和试验测定值进行分析比较,发现3种理论方法中DFT-B3LYP算法更加精确,与实际测量值的误差更小,更加适合用于对此类化合物的分析与预测。同时用B3LYP泛函在6-31 +G**机组水平对松香的几种主要树脂酸进行能量分析,预测其稳定性并得到相应的热力学参数。结果表明:计算化学方法也是科学研究的一种有用工具,精确的理论计算能够获得实验室难于得到的重要的化学与物理信息,理论计算也可作为研究该类体系的一种新方法。The geometry of abietic acid has been investigated by several theoretical methods including the Hartree-Fock and DFF-B3LYP level of ab initio theory. Its most stable structure is determined by the minimum energy. Comparing with the known experimental results, DFT-B3LYP which has the smallest error in three theoretical methods is the best one for analysis and predication of these systems. In the mean time, the relative energies of four resin acids in rosin were analysized by the B3LYP/ 6-31 ＋ G＊＊ calculations. The calculation results predicted their stability and thermodynamic properties such as their values of Gibbs free energy, thermal enthalpies, thermal capacity and entropy. This research also shows that chemical calculations can be an important tool in scientific study. Accurate theoretical calculations can provide ways to obtain important chemical and physical information that cannot be easily obtained by experimental approaches. Clearly theoretical calculation gives a new method to investigate these systems.国家自然科学基金(20761002);教育部科学技术重点项目(205121);国家民委项目(07GX11);广西科学基金项目(桂科青0481034);广西高校人才小高地科研基金项目;广西化工研究院横向项目;广西林产化学品开发与利用重点试验室开放基

Molecule Structure and Properties of Dehydroabietylamine

基于Hartree-Fock法对脱氢枞胺构型进行几何优化确定。将计算的结构参数与参照体系的单晶衍射数据进行比较,并将计算得到的红外参数值和核磁共振氢谱分别与实测的FT-IR和H-NMR结果进行拟合,发现理论计算值和实验测定值基本一致,同时得出一些相应的热力学参数理论值。研究表明,用计算化学方法对松香类化合物进行模拟研究是可行的,也为实验室研究松香类化合物提供理论依据。The geometries optimization of dehydroabietylamine configuration were finished to determine the configuration by the Hartree-Fock theory and caculated structure parameter was compared with consulting system single crystal diffraction data. The caculated infra-red parameter value and nuclear magnetic resonance hydrogen spectrum were matched with FT-IR and H-NMR resuits, it found that the calculation results were approximately coincident with that of experiments determining values. The corresponding thermodynamic parameters theory values were also obtained. The simulation research on rosin type of compound was feasible with calculation chemical method, it also provided the theory basis for research on rosin type of compound in laboratory.国家自然科学基金(20761002);教育部科学技术重点项目(205121);国家民委项目(07GX11);广西科学基金项目(桂科青0481034);广西高校人才小高地科研基金项目;广西化工研究院横向项目;广西林产化学品开发与利用重点实验室开放基

Application of Logical Thinking in teaching Organic Chemistry

有机化学涉及的化合物和化学反应众多,但它们并不是各自孤立的,而是互相联系的;如果能够在有机化学的教与学中恰当运用逻辑思维方法,使貌似孤立的内容互相联系起来,有利于帮助学生认识化学变化的本质和规律,使学生所学的知识成为有机的整体,将繁杂的内容变得易于理解和记忆,这无疑有助于提高有机化学的教与学的质量,从而达到更好地学习并掌握有机化学基本知识、基础理论的目的,潜移默化中还可以提高学生的创造性思维能力.Though thousands of organic compounds and reactions are involved in organic chemistry, they are not isolate from but correlated with each other. They that seem independent would be mutually connected if logical thinking were properly applied in teaching or learning organic chemistry. Logical thinking would be valuable for students to understand the principle and regularity of chemical changes, lead their knowledge learned into integrality, and make the sophisticate content of organic chemistry easy. By this ap- plication, it is no doubt that, with more efficiency, the teaching effectiveness will be improved and students will gain the necessary knowledge and principle of organic chemistry. And this will exert a subtle influence on the creationary ideation of students.广西区实验教学示范中心建设项目教改专项(Y17);广西民族大学教育教学改革研究课

The Improvement in Preparation of Ethyl Acetate at Laboratory

对现有教学实验中乙酸乙酯教学实验进行改进,用强酸性苯乙烯系阳离子交换树脂作为催化剂催化合成乙酸乙酯.最佳工艺条件为:树脂催化剂用量5g,硫酸1mL,反应温度80℃~90℃,反应时间15min,乙酸:乙醇(1∶1.5);实验全部用时1~2小时,平均产率接近70%,非常适合用于有机化学教学实验中的乙酸乙酯的合成.Making an improvement on the present preparation of ethyl acetate in the experimental textbook, Esterification was carried out at the catalyst of strong--acid--type cation--exchange--resin of styrene with few sulfuric acid. Optimum conditions is as follows： n （acetic acid） ： n （ethanol） =1 ：1. 5, The amount of acid resin catalyst is 5g, concentrated sulfuric acid 1 mL, reaction temperature 80～90℃, reaction time 15 rain. The total time of experiment is range from 1 to 2 hours. The average yield of final product can be close to 70%. This method serves the teaching experiment good in the preparation of organic chemistry.广西民族学院教育科学研究课