检索结果-南通市图书馆

Thermal decomposition of Pr[(C_(5)H_(8)NS_(2))_(3)(C_(12)H_(8)N_(2))]

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China chemistry 2005年第Z1期48卷 83-87页

关键词： Pr[(C5H8NS2)3(C12H8N2)], thermal analysis, kinetics, noncrystal, characteristics.

Thermokinetics on the reaction of formation of Dy[（C5H8NS2）3(C12H8N2)]

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China chemistry 2005年第S1期48卷 74-78页

作者： gao shengli,chen sanping,jiao baojuan,ShuAI Qi & shi qizhen department of chemistry,Shaanxi Key Laboratory of Physico-lnorganic chemistry,northwest university,Xi’an 710069,China department of chemistry Shaanxi Key Laboratory of Physico-lnorganic Chemistry Northwest University Xi’an China

The enthalpy change of formation of the reaction of hydrous dysprosium chloride with ammonium pyrrolidinedithiocarbamate (APDC) and 1,10-phenanthroline (o-phen·H2O) in absolute ethanol at 298.15 K has been determined as (-16.12±0.05) kJ·mol-1 by a microcalor-meter. Thermodynamic parameters (the activation enthalpy, the activation entropy and the activation free energy), rate constant and kinetics parameters (the apparent activation energy, the pre-exponential constant and the reaction order) of the reaction have also been calculated. The enthalpy change of the solid-phase reaction at 298.15 K has been obtained as (53.59±0.29) kJ·mol-1 by a thermochemistry cycle. The values of the enthalpy change of formation both in liquid-phase and solid-phase reaction indicated that the complex could only be synthesized in liquid-phase reaction.

关键词： hydrous dysprosium chloride ammonium pyrrolidinedithiocarbamate (APDC) 1 10-phenanthroline (o-phen) microcalorimetry thermochemistry

Standard energies of combustion and standard enthalpies of formation for the complexes RE (Et_2dtc)_3(phen) (RE = Ho,Er,Tm,Yb,Lu)

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2005年第4期24卷 301-305页

作者： WEI Qing chen sanping YANG Xuwu gao shengli shi qizhen department of chemistry Shaanxi Key Laboratory of Physico-Inorganic Chemistry Northwest University Xi＇an 710069 China

The treatment of ***2O （RE = Ho, Er, Tm, Yb, Lu; x = 3-4） with sodium diethyldithiocarbamate （NaEtEdtc-3H2O） and 1,10-phenanthroline hydrate （o-phen.H2O） in absolute ethanol yielded five ternary solid complexes RE（EtEdtC）a（phen）. IR spectra of the complexes showed that RE^3＋ coordinated to two sulfur atoms in NaEt2dtc and two nitrogen atoms in o-phen. The constant-volume energies of combustion of the complexes have been determined by a precise rotating-bomb calorimeter at 298.15 K. The standard enthalpies of combustion and standard enthalpies of formation were calculated.

关键词： thermochemistry combustion energy calorimeter RE(Et2dtc)3(phen) standard enthalpy of formation

Thermochemistry on coordination behavior of samaric chloride hydrate with diethylammonium diethyldithiocarbamate

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2004年第3期23卷 203-208页

作者： jiaobaojuan RENYixia chensanping gaoshengli ZHAOFengqi shiqizhen departmentofchemistry ShaanxiKeyLaboratoryofPhysico-InorganicChemistryNorthwestUniversityXi＇an710069China Xi＇anModemchemistryResearchInstitute Xi＇an710072China departmentofchemistry ShaanxiKeyLaboratoryofPhysico-InorganicChemistryNorthwestUniversityXi＇an710069China

The complex of samaric chloride lower hydrate with diethylammoniumdiethyldithiocarbamate (D-DDC) was synthesized conveniently in absolute alcohol and dry N_2atmosphere. The title complex was identified as Et_2NH_2[Sm(S_2CNEt_2)_4] by chemical and elementalanalyses, the bonding characteristics of which was characterized by IR. The enthalpies of solutionof samaric chloride hydrate and D-DDC in absolute alcohol at 298.15 K and the enthalpies change ofliquid-phase reaction of formation for Et_2NH_2[Sm(S_2CNEt_2)_4] at different temperatures weredetermined by mi-crocalorimetry. On the basis of experimental and calculated results, threethermodynamic parameters (the activation enthalpy, the activation entropy, and the activation freeenergy), the rate constant, and three kinetic parameters (the apparent activation energy, thepre-exponential constant, and the reaction order) of liquid phase reaction of formation wereobtained. The enthalpy change of the solid-phase title reaction at 298.15 K was calculated by athermochemical cycle.

关键词： inorganic chemistry thermochemistry microcalorimetric method samaricchloride hydrate diethylammonium diethyldithiocarbamate (D-DDC)

Determination of combustion energies and the standard enthalpies of formation for the complexes of RE(Et_(2)dtc)_(3)(phen)

在线全文

学校读者我要写书评

暂无评论

Science China chemistry 2005年第z1期48卷 88-92页

作者： YANG Xuwu Zhu Li chen sanping gao shengli shi qizhen department of chemistry Shaanxi Key Laboratory of Physico-Inorganic ChemistryNorthwest UniversityXi'an 710069China

Solid complexes,RE(Et_(2)dtc)_(3)(phen)(RE=La,Pr,Nd,Sm-Lu),were synthesized with sodium diethyldithiocarbamate(NaEt_(2)dtc3H_(2)O),1,10-phenanthroline(o-phen·H_(2)O)and hydrated lanthanide chlorides in absolute *** constant-volume combustion energies of complexes,Δ_(c)U,were determined by a precise rotating-bomb calorimeter at 298.15 *** standard enthalpies of combustion,Δ_(c)H^(θ)_(m),and standard enthalpies of formation,Δ_(f)H^(θ)_(m),were calculated for these complexes,*** experiment results showed the'tripartite effect'of rare earth.

关键词： thermochemistry combustion energies calorimeter RE(Et_(2)dtc)_(3)(phen) standard enthalpies of formation

Combustion energies and standard molar enthalpies of formation for the complexes of the first-row transitional metal chlorides with L-α-histidine

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2003年第4期48卷 319-322页

作者： gao shengli, chen sanping, YANG Xuwu & shi qizhen Shaanxi Key Laboratory of Physic-Inorganic chemistry/chemistry De-partment of northwest university, Xi抋n 710069, China Correspondence should be addressed to gao shengli Shaanxi Key Laboratory of Physic-Inorganic chemistry Chemistry Department Northwest University Xi'an 710069 China

Seven novel solid complexes of the first-row transitional metal with L-a -histidine were synthesized, and their compositions were determined. The constant-volume combustion energies of the complexes were measured by a precision rotation bomb calorimeter. The standard molar enthalpies of combustion and the standard molar enthalpies of formation were calculated. The results indicated that the plots of the standard enthalpies of formation against the atomic number of the metal show a regularity of zigzag.

关键词： transitional metal chloride L-a -histidine solid complex standard molar enthalpies of formation.

Thermokinetics on the reaction of formation of Dy[(C_(5)H_(8)NS_(2))_(3)(C_(12)H_(8)N_(2))]

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China chemistry 2005年第Z1期48卷 74-78页

作者： gao shengli chen sanping jiao baojuan ShuAI Qi shi qizhen department of chemistry Shaanxi Key Laboratory of Physico-lnorganic Chemistry Northwest University Xi'an 710069China Department of Chemistry Shaanxi Key Laboratory of Physico-lnorganic Chemistry Northwest University Xi'an 710069China Department of Chemistry Shaanxi Key Laboratory of Physico-lnorganic Chemistry Northwest University Xi'an 710069China Department of Chemistry Shaanxi Key Laboratory of Physico-lnorganic Chemistry Northwest University Xi'an 710069China Department of Chemistry Shaanxi Key Laboratory of Physico-lnorganic Chemistry Northwest University Xi'an 710069China

The enthalpy change of formation of the reaction of hydrous dysprosium chloride meter. Thermodynamic parameters (the activation enthalpy, the activation entropy and the activation free energy), rate constant and kinetics parameters (the apparent activation energy, the pre-exponential constant and the reaction order) of the reaction have also been calculated. The enthalpy change of the solid-phase reaction at 298.15 K has been obtained as (53.59 ± 0.29)liquid-phase and solid-phase reaction indicated that the complex could only be synthesized in liquid-phase reaction.

关键词： hydrous dysprosium chloride, ammonium pyrrolidinedithiocarbamate (APDC), 1,10-phenanthroline(o-phen), microcaiorimetry, thermochemistry.

Zn(Leu)SO_4·0.5H_2O在丙酮-水混合溶剂中的结晶动力学

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

化学学报 2002年第12期60卷 2220-2224页

作者：高胜利房艳陈三平胡荣祖史启祯陕西省物理无机化学重点实验室/西北大学化学系西安710069

确定了Zn(Leu)SO4 ·0 5H2 O在水 -丙酮中结晶生长的最佳体积比为 1∶5,用微量热法测定了该结晶生长过程在 2 98 15K时的放热量及产热速率,计算了动力学常数,认为结晶过程符合Burton Cabrera Grank位错理论.同时测定了Zn(Leu)SO4 ·0 ... 详细信息

确定了Zn(Leu)SO4 ·0 5H2 O在水 -丙酮中结晶生长的最佳体积比为 1∶5,用微量热法测定了该结晶生长过程在 2 98 15K时的放热量及产热速率,计算了动力学常数,认为结晶过程符合Burton Cabrera Grank位错理论.同时测定了Zn(Leu)SO4 ·0 5H2 O 2 98 15K时在纯水中的溶解焓为(3 17± 0 0 9)kJ·mol-1,计算了Zn(Leu)2 +(aq)的标准生成焓为( - 10 88 2 6± 4 2 8)kJ·mol-1.

关键词：丙酮水 Zn(Leu)SO4·0.5H2O 混合溶剂结晶动力学微量热法溶解焓 α-氨基酸锌

水合氯化镧与二乙氨基荒酸二乙铵配合行为的热化学

在线全文

学校读者我要写书评

暂无评论

化学学报 2003年第12期61卷 2020-2024页

作者：高胜利陈三平焦宝娟任宜霞胡荣祖赵凤起史启祯西北大学化学系西安近代化学研究所西安710065

在干燥氮气气氛下 ,以无水乙醇为溶剂 ,制备了低水合氯化镧与二乙氨基荒酸二乙铵 (D DDC)的配合物 ,确定其组成为Et2 NH2 [La(S2 CNEt2 ) 4 ] .用微量热法测定了 2 98.15K下水合氯化镧和D DDC在无水乙醇中的溶解焓和不同温度下二乙氨基... 详细信息

在干燥氮气气氛下 ,以无水乙醇为溶剂 ,制备了低水合氯化镧与二乙氨基荒酸二乙铵 (D DDC)的配合物 ,确定其组成为Et2 NH2 [La(S2 CNEt2 ) 4 ] .用微量热法测定了 2 98.15K下水合氯化镧和D DDC在无水乙醇中的溶解焓和不同温度下二乙氨基荒酸镧液相生成反应的焓变 .在实验和计算基础上 ,得到了液相生成反应的热力学参数 (活化焓、活化熵和活化自由能 )、速率常数和动力学参数 (表现活化能、频率因子和反应基数 ) ,通过合理的热化学循环。

关键词：水合氯化镧二乙氨基荒酸二乙铵配合行为热化学微量热法镧配合物