AM1—法研究邻—氨基苯甲醇和邻—氨基苯甲胺的热分解反应

本文用AM1方法研究了邻-氨基苯甲醇和邻-氨基苯甲胺热分解生成6-亚甲基-2.4-环己二烯-1-亚胺的反应.结果表明.邻-氨基苯甲醇和邻-氨基苯甲胺的热分解活化能分别为206.890 kJ/mol和214.572kJ-mol.     

催化氢化法制备对氨基苯甲醚

采用合成氨厂氨合成气代替纯氢气催化氢化对硝基苯甲醚合成对氨基苯甲醚的新工艺,探讨了合成反应条件和对氨基苯甲醚收率的影响规律.在催化剂用量1%,反应温度140℃,反应压力4MPa,反应时间3h的优化工艺条件下,邻氨基苯甲醚的收率达到96%以上.     

聚苯乙烯支载烷氨基吡啶催化合成烯醇酯的研究

以大孔聚苯乙烯氯球为原料 ,将之与氨基吡啶及硫酸二甲酯反应 ,制成聚苯乙烯支载N -苄基 -N -甲基氨基吡啶催化剂 .利用该催化剂进行醛的烯醇酯化反应 .对影响反应的诸因素进行了讨论 ,酯的收率在 60 %左右     

Pd/C催化水合肼还原法制备邻氨基苯酚

采用在Pd/C催化下水合肼还原邻硝基苯酚的方法制备邻氨基苯酚,研究了反应温度、催化剂用量和还原剂用量对反应产物收率的影响.优化条件为:95%乙醇为溶剂,0.010 g质量分数为10%的Pd/C催化下,1.300 g质量分数为85%的水合肼还原1.390 g邻硝基苯酚,在75~80℃下反应4 h后,反应粗产物用95%乙醇重结晶得邻氨基苯酚0.95 g,收率为87.16%.目标产品通过了红外、紫外、氢核磁共振和质谱表征.     

2—芳氨基苄基（或甲基）环己酮肟的Beckmann重排反应

２－芳氨基苄基（或甲基）环己酮（１）与羟胺盐酸盐在过量氢氧化钠的乙醇和水溶液中回流,转变为２－芳氨基苄基（或甲基）环己酮肟（２）,（２）可能为Ｅ或Ｚ构型,在多聚磷酸存在下,用甲苯为共溶剂,（２）能顺利进行Ｂｅｃｈｍａｎｎ重排反应,得到４个２－芳氨基苄基－５－己内酰胺和３个２－芳氨基甲基－５－己内酰胺（３）,均为未见文献报导的新化合物。用元素分析,ＭＳ,ＩＲ,＾１ＨＮＭＲ,＾１３ＣＮＭＲ分析确定了它     

N—（3—乙烯基苄基）邻苯二甲酰亚胺的合成研究

苯环上引入不饱和的烃基在有机合成上具有十分重要的意义 介绍了以N - (3-碘苄基 )邻苯二甲酰亚胺和三甲基甲硅烷乙炔为起始原料 ,在苯环上引入乙炔基及乙烯基的新方法。并通过质谱、核磁对其进行了结构表征     

邻乙酰氨基苯甲醚氯磺化产物结构研究

研究了邻乙酰氨基苯甲醚的氯碘化的反应产物。通过元素分析、红外光谱、氢核磁共振谱、地维核磁共振Ｈ－Ｈ化学位移相关谱、碳核磁共振谱,确定该氯磺化反应仅有单一结构的３－乙酰氨基－４－甲摒在苯磺酰氯生成,未发现有异构体存在。     

[CH_2N(C_2H_5)_3(?)NO_2]~ CI~-的制备

本文利用氯化苄在混酸作用下进行硝化得硝基氯化苄,然后用乙醇重结晶得纯净的硝基氯化苄。在乙酸乙酯作溶剂的条件下与三乙胺混和加热、回流、搅抖进行季铵化反应得到三乙基对(邻)硝基苄基氯化铵。此法比用乙腈作溶剂有以下优点:①反应过程中出现沉淀便于处理②产率较高③产物纯度较高。     

[C2H5）3NH2C-苯环-NO2]^＋Cl^-的制备

本文利用氯化苄在混酸作用下进行硝化得硝基氯化苄，然后用乙醇重结晶得纯净的硝基氯化苄，在乙酸乙酯作溶剂的条件下与三乙胺混和加热，回流，搅拌进行季铵化反应得到三乙基对（邻）硝基苄基氯化铵。此法比用乙腈作溶剂有以下优点：①反应过程中出现沉淀便于处理②产率较高③产物纯度较高。     

N-邻苯氨基-β-烯胺酯合成的理论及实验研究

采用Gaussian03程序,应用密度泛函量化计算(DFT)方法,在B3LYP/6-31G机组水平上通过构型优化、热力学分析、电荷分布等分析,从理论上研究了乙酰乙酸乙酯与邻苯二胺制备N-邻苯氨基-β-烯胺酯的反应,提出了该反应可能的机理,并在此理论前提下对该反应进行了实验研究.实验结果表明:N-邻苯氨基-β-烯胺酯为反应的主要产物,和理论研究结果相符;以二氯甲烷为溶剂,冰醋酸为催化剂,在加热回流的条件下,N-邻苯氨基-β-烯胺酯的产率可达92%.该方法反应条件温和,操作简便,收率稳定.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that