3,4-亚甲二氧基硝基苯合成和晶体结构

3,4-亚甲二氧基硝基苯由1,2-亚甲二氧基苯经硝化反应合成. 其晶体结构经X射线衍射测定为单射晶系,空间结构P21/c,Z=4,晶包参数为a=0.378 00(8) nm; b=1.000 3(2) nm; c=1.822 4(4) nm; β=97.33(3)°; Mr=167.12; V=0.683 4(2) nm3, Dc=1.624 g/cm3, μ(MoKα)=0.136 mm-1, F(000)=344, R=0.070 7, wR=0.182 8. 3,4-亚甲二氧基硝基苯中所有原子位于同一平面上,其中O(1)最大偏离为-0.003 4 nm.     

5,6-二(2-甲氧基苯胺基)-2,3-吡啶二酮的合成和晶体结构

在无溶剂条件下,由3-羟基-2(1H)-吡啶酮与2-甲氧基苯胺在NaIO3作用下合成了5,6-二(2-甲氧基苯胺基)-2,3-吡啶二酮,其结构经1HNMR表征.采用X-射线单晶衍射仪测定了产物的晶体结构,晶体结构属单斜晶系,空间群P21/n,晶胞参数为:a=1.1655(2)nm,b=0.72080(10)nm,c=2.0326(4)nm,α=90°,β=92.17(3)°,γ=90°,V=1.7063(5)nm3,Z=4,F(000)=736,Mr=351.36,Dc=1.368g/cm3,μ=0.098mm-1,R1=0.0587,wR2=0.1365.     

2-(2,4-二氯-5-氟-苯甲酰基)-3-(4-氯苯基)-4-( 1,2,4-三唑-1-基)-5-苯基氨基噻吩的合成、晶体结构及光谱特性

测定了合成的标题化合物的晶体结构并对其光谱特性进行了分析．晶体为单斜晶系,P2(1)/c空间群,晶胞参数为：a=1．4665(3)nm,b=0．75437(15)nm,c=2．2891(5)nm,β=105．98(3)^*,V=2．4345(8)nm^-3,Z=4,Dc=1．484g/cm^3．     

5-芳甲基-4-叔丁基-2-氨基噻唑的合成与表征

溴化铜在乙醇中溴化4,4-二甲基-1-芳基-3-戊酮,得到α-溴化产物不经分离直接与硫脲环合制得9种2-氨基噻唑类新化合物,收率21.9%~92.9%.目标物2-氨基噻唑类化合物经核磁谱、红外光谱、质谱测定其结构.用单晶X-射线衍射测定了化合物1g.HBr的晶体结构.化合物1g.HBr晶体属单斜晶系,空间群为P2(1)/c,晶胞参数为:a=0.96 713(5)nm,b=1.558 25(8)nm,c=1.306 87(7)nm,Z=4,V=1.665 34(15)nm3,Dc=1.577 g/cm3,F(000)=800,R1=0.0313,ωR2=0.0757,S=1.024.     

二氯·二[1-对甲氧基苯基-3-（1,2,4三唑-1-基）-1-丙酮-N4]合钴（Ⅲ）的合成及晶体结构

合成了配合物二氯·二[1-对甲氧基苯基-3-(1,2,4三唑-1-基)-1-丙酮-N4]合钴(Ⅱ),并测定了其晶体结构.晶体为单斜晶系,C2/c空间群,晶胞参数:a=2.100 8(4)nm,b=0.488 88(10) nm,c=2.627 4(5) nm,β=98.10(3)°,V=2.671 5(9) nm3,Z=4,Dc=1.473 g/cm3.晶体配合物为C2对称,对称轴通过钴原子,钴原子与来自配体的两个氮原子和两个氯原子配位,形成一个略变形的正四面体结构,测定了其IR及UV-vis光谱性质.     

[γ-SiW10O36]构成的二聚杂多酸盐的合成及表征

采用常规方法合成了新颖的二聚的多金属氧酸盐K8[{γ-Si W10O32}2(μ2-O)4].13H2O(Ⅰ).对其进行了元素分析、红外光谱及TG表征,并测定了其晶体的结构.单晶X射线结构测定表明:化合物Ⅰ的独立结构单元由2个γ-Si W10O36单元通过4个W—O—W键连接构成;晶体属单斜晶系,空间群为P2(1)/n;a=1.524 4(3)nm,b=1.320 3(3)nm,c=1.904 4(4)nm,β=105.45(3)°,V=3.694 2(13)nm3,Z=2,R1=0.070 6,wR2=0.162 1.     

二氯·二[1-对甲氧基苯基-3-(1,2,4三唑-1-基)-1-丙酮-N~4]合钴(Ⅲ)的合成及晶体结构

合成了配合物二氯.二[1-对甲氧基苯基-3-(1,2,4三唑-1-基)-1-丙酮-N4]合钴(Ⅱ),并测定了其晶体结构.晶体为单斜晶系,C 2/c空间群,晶胞参数:a=2.100 8(4)nm,b=0.488 88(10)nm,c=2.627 4(5)nm,β=98.10(3),°V=2.671 5(9)nm3,Z=4,Dc=1.473 g/cm3.晶体配合物为C2对称,对称轴通过钴原子,钴原子与来自配体的两个氮原子和两个氯原子配位,形成一个略变形的正四面体结构,测定了其IR及UV-v is光谱性质.     

Ni(C8H7O3)2(H2O)2配合物的合成及晶体结构

合成了镍的香草醛三元配合物,得到了单晶,测定了晶体结构.结果表明该化合物属单斜晶系,CC空间群,其晶胞参数为a=2.1827(3)nm,b=1.05039(16)nm,c=0.77393(12)nm;β=104.924(3)°.该配合物分子式为C16H18NiO8,Mr=397.01,配合物是六配位的变形八面体构型.     

链状铜配合物[Cu(bipy)_2Cl]_2Cl_2·nH_2O(bipy=2,2′-联吡啶)水热合成

利用水热合成方法制备了一种新颖的由π-π堆积形成的链状二价铜配合物[Cu(bipy)2Cl]2Cl2·nH2O(bipy=2,2'-联吡啶),并用单晶衍射仪测定了其晶体结构,在2K～300K之间测定其磁化率.结果表明:该化合物为单斜晶系,P2/c空间群,a=1.2328(3)nm,b=1.4781(3)nm,c=1.4311(3)nm,α=90°,β=108.51(3)°,γ=90°,V=2.4730(9)nm3;8K～298K之间标题化合物呈现明显的铁磁性耦合相互作用,在2K～8K范围内却呈现出反铁磁性相互作用的特征.元素分析及红外光谱进一步佐证了化合物的结构.     

红色荧光配合物Eu(NO3)3(Phen)2的晶体结构

合成了红色荧光配合物Eu(NO3)3(Phen)2并测定了其晶体结构.配合物属单斜晶系,Cc(#7)空间群.晶胞参数为:a=1.1161(2)nm, b=1.7963(4)nm, c=1.3042(3)nm, α=90.00(0)°, β=100.57(3)°, γ=90.00(0)°.晶胞体积V=2.5704(9)nm3,Z=4. 晶体密度Dc=1.805g·cm-3.最终的偏离因子R=0.0293.中心Eu3 离子为10配位,配位原子分别为3个NO-3根的6个氧原子和2个中性螯合配体Phen的4个氮原子,构成高度畸变的双冠四方反棱柱体,或双冠四边形顶蝶形底扭棱柱体.     

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