HDEHP萃取Ga（Ⅲ）的动力学

用生长液滴法研究了ＨＤＥＨＰ在盐酸介质中萃取Ｇａ（Ⅲ）的动力学，结果表明，萃取反应速率取决于发生在界面区域内两步连续反应Ｇａ３＋＋Ａｉ－＝ＧａＡｉ２＋ＧａＡｉ２＋＋Ａｉ－＝ＧａＡ２＋ｉ研究了阴离子表面活性剂ＳＤＳ、ＡＢＳ对ＨＤＥＨＰ萃取Ｇａ（Ⅲ）的影响，二者均不改变ＨＤＥＨＰ萃取Ｇａ（Ⅲ）的分配比，但使其正向萃取初始速率降低，原因是表面活性剂与萃取剂在界面上发生了竞争吸附；其次是表面活性剂的加入导致了界面膜上分子排列更致密和界面膜增厚，产生了更大的传质阻力。     

THE STUDY OF STRUCTURE AND DYNAMICS OF DINUCLEAR COMPLEXES ［Mo（VI）］_2－EDTA AND ［Mo（VI）］_2－EGTABY~1HNMR

ＴＨＥＳＴＵＤＹＯＦＳＴＲＵＣＴＵＲＥＡＮＤＤＹＮＡＭＩＣＳＯＦＤＩＮＵＣＬＥＡＲＣＯＭＰＬＥＸＥＳ［Ｍｏ（ＶＩ）］_２－ＥＤＴＡＡＮＤ［Ｍｏ（ＶＩ）］_２－ＥＧＴＡＢＹ~１ＨＮＭＲＲｕｉＦａｎｇＳＯＮＧ；ＦｅｉＬＩ；ＧｕａｎｇＭｉｎＬＩＵ；ＹｏｕＧａ?..     

Molecular Structure of Organolanthanide Complex ［（η~5－CH_3C_5H_4）_2Tb（μ－Cl）（THF）］_2

ＭｏｌｅｃｕｌａｒＳｔｒｕｃｔｕｒｅｏｆＯｒｇａｎｏｌａｎｔｈａｎｉｄｅＣｏｍｐｌｅｘ［（η~５－ＣＨ_３Ｃ_５Ｈ_４）_２Ｔｂ（μ－Ｃｌ）（ＴＨＦ）］_２ＷＵＺｈｏｎｇ－Ｚｈｉ；ＨＵＡＮＧＺｕ－Ｅｎ；ＣＡＩＲｕｉ－Ｆａｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅ...     

A NOVEL REACTION BETWEEN Ge－Ge AND Fe－Fe BONDS IN COMPLEX （Me_2GeGeMe_2）［（η~5－C_5H_4）Fe（CO）］_2（μ－CO）_2 AND CRYSTAL STRUCTURE OF THE PRODUCT

ＡＮＯＶＥＬＲＥＡＣＴＩＯＮＢＥＴＷＥＥＮＧｅ－ＧｅＡＮＤＦｅ－ＦｅＢＯＮＤＳＩＮＣＯＭＰＬＥＸ（Ｍｅ_２ＧｅＧｅＭｅ_２）［（η~５－Ｃ_５Ｈ_４）Ｆｅ（ＣＯ）］_２（μ－ＣＯ）_２ＡＮＤＣＲＹＳＴＡＬＳＴＲＵＣＴＵＲＥＯＦＴＨＥＰＲＯＤＵＣＴ￥ＸｉｕＴ?..     

烷基磷（膦）酸萃取剂钠盐与非离子表面活性剂AEO_9混合体系胶团的形成和分子间的相互作用

本文研究了烷基磷（膦）酸萃取剂钠盐ＮａＥＨＥＨＰ，ＮａＤＴＭＰＰ，Ｎａ_２（ＭＥＨＰ）与非离子表面活性剂ＡＥＯ_９以不同比例复配后水溶液胶团的形成及分子间的相互作用，结果表明混合胶团的形成使ＣＭＣ大大降低。分子间在胶团中的相互作用强弱为：Ｎａ_２（ＭＥＨＰ）体系＞ＮａＤＴＭＰＰ体系＞ＮａＥＨＥＨＰ体系，分子间在表面层的吸引作用小于同体系分子间在胶团中的相互作用，这一结果有利于混合胶团的形成。     

UNUSUAL FORMATION OF ORGANO－NEODYMIUM AND －SAMARIUM CATIOHS AND X－RAY STRUCTURE OF［（MeOCH_2CH_2C_5H_4）_2Sm（thf）］［Co（CO）_4］

ＵＮＵＳＵＡＬ　ＦＯＲＭＡＴＩＯＮ　ＯＦ　ＯＲＧＡＮＯ－ＮＥＯＤＹＭＩＵＭ　ＡＮＤ　－ＳＡＭＡＲＩＵＭ　ＣＡＴＩＯＨＳ　ＡＮＤ　Ｘ－ＲＡＹ　ＳＴＲＵＣＴＵＲＥ　ＯＦ［（ＭｅＯＣＨ_２ＣＨ_２Ｃ_５Ｈ_４）_２Ｓｍ（ｔｈｆ）］［Ｃｏ（ＣＯ）_４］ＵＮＵＳＵＡ...     

DYNAMIC NMR STUDIES ON [Li(3D)] [La(η~3-C_3H_5)_4]

ＹＮＡＭＩＣＮＭＲＳＴＵＤＩＥＳＯＮ［Ｌｉ（３Ｄ）］［Ｌａ（η~３－Ｃ_３Ｈ_５）_４］￥ＦｅｎｇＦｕＬＩ；ＹｉｎｇＴａｉＪＩＮ；ＸｉＴｉａｎＺＨＡＮＧ；ＦｅｎｇＫｕｉＰＥＩ（ＣｈａｎｇｃｈｕｎＩｎｓｔｉｔｕｔｅｏｆＡｐｐｌｉｅｄＣｈｅｍｉｓｔｒｙ，Ｃｈ...     

STUDIES OF FAR－INFRARED SPECTRA AND SOLID－SOLID PHASE TRANSITION IN ［n－C_nH_（2n＋1）NH_3］_2 CuX_4 LAYER COMPOUNDS WITH n＝7－12，16

ＳＴＵＤＩＥＳＯＦＦＡＲ－ＩＮＦＲＡＲＥＤＳＰＥＣＴＲＡＡＮＤＳＯＬＩＤ－ＳＯＬＩＤＰＨＡＳＥＴＲＡＮＳＩＴＩＯＮＩＮ［ｎ－Ｃ_ｎＨ_（２ｎ＋１）ＮＨ_３］_２ＣｕＸ_４ＬＡＹＥＲＣＯＭＰＯＵＮＤＳＷＩＴＨｎ＝７－１２，１６￥ＮｉｎｇＧＵＯ（Ｄｅｐａｒｔ?..     

脱氧核糖核酸变性和损伤的吸附伏安法研究

本文用汞电极（ＨＭＤＥ）二次导数阴极吸附伏安（ＳＤ－ＡｄＣＳＶ）和碳电极（ＧＣＥ、ＣＰＥ）导数循环伏安（ＦＤ－ＣＶ）法研究了核酸受热、紫外线、超声波和丝裂霉素Ｃ（ＭＭＣ）作用下的变性作用。在０．１ｍｏｌ／Ｌ（Ｋ２ＨＰＯ４＋ＫＨ２ＰＯ４）－０．１ｍｏｌ．Ｌ ＮａＣｌ（ｐＨ７．０）底液中，吸附的单股（ｓｓ－）和双螺旋（ｄｓ－）ＤＮＡ分别在ＨＭＤＥ上得到特征还原峰Ｐ３和Ｐ２，和在碳电极上得到氧化峰Ａ。物     

Electrochemical Study of Trinuclear Metal Complexes ［M_3O_2（O_2CCH_3）_6（H_2O）_3］~（2＋）（M_3＝Mo_3，MoW_2，W_3）

ＥｌｅｃｔｒｏｃｈｅｍｉｃａｌＳｔｕｄｙｏｆＴｒｉｎｕｃｌｅａｒＭｅｔａｌＣｏｍｐｌｅｘｅｓ［Ｍ_３Ｏ_２（Ｏ_２ＣＣＨ_３）_６（Ｈ_２Ｏ）_３］~（２＋）（Ｍ_３＝Ｍｏ_３，ＭｏＷ_２，Ｗ_３）ＬｉｕＨｕａｎｇ；ＸｕＬｉ；ＨｕａｎｇＪｉｎ－Ｓｈｕｎ；ＹａｎＤ...     

二氧化碳和丙烯直接合成甲基丙烯酸的NiPMo/TiO2催化剂的研究

用溶胶-凝胶法以磷钼酸(MPA)的镍盐溶液水解钛酸四丁酯制备了NiPMo/TiO2催化剂.使用ICP、 XRD、 TG-DTA、 IR、 TPD-MS和微反应技术研究了催化剂的化学组成、热稳定性、化学吸附性质和催化反应性能.杂多钼酸盐与TiO2通过O2-在TiO2表面发生了键合.在623 K下,杂多阴离子仍保持原有的Keggin结构.CO2在Lewis酸位Ni(Ⅱ)和Lewis碱位Ni-O-Mo的桥氧协同作用下生成CO2卧式吸附态Ni(Ⅱ)←O-(CO)←(O--Ni).丙烯有多种吸附态在催化剂上吸附.在563 K、 1 MPa和空速1500 h-1的反应条件下,丙烯的摩尔转化率为3.2%,产物MAA选择性为95%.     

α-Amino acid derived enaminones and their application in the synthesis of N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates and other heterocycles

A new and simple synthesis of novel N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates, which exist in equilibrium with their 4-oxo tautomers, has been developed in two steps starting from N-protected α-amino acids. The key intermediates are enaminones, which can also be isolated, characterized, and used for the construction of other functionalized heterocycles, before they spontaneously decompose to pyrrole products. 4-Hydroxypyrroles are prone to partial aerial oxidation but can be efficiently alkylated or reduced to stable polysubstituted pyrrolidine derivatives.     

Specific intramolecular aromatic CH insertion of diazosulfonamides

The chemoselectivity in the intramolecular CH insertion of various diazosulfonamides has been experimentally studied. The results reveal that the aliphatic 1,4-, 1,5-, or 1,6-C(sp³)?H insertions of diazosulfonamides are not accessible, while the aromatic 1,5-C(sp²)?H insertion can be realized specifically by adjusting the diazo-adjacent group. In addition, the general chemoselectivities in the intramolecular CH insertions of diazosulfonyl compounds are summarized. Generally, diazosulfones undergo both aromatic 1,5-C(sp²)?H and aliphatic 1,5- and 1,6-C(sp³)?H insertions, while diazosulfonates undergo aliphatic 1,5- and 1,6-C(sp³)?H insertions. However, diazosulfonamides only undergo aromatic 1,5-C(sp²)?H insertion.     

Toward new camptothecins. Part 6: Synthesis of crucial ketones and their use in Friedländer reaction

In the context of the preparation of camptothecin and luotonin A analogs, the synthesis of some key keto-precursors and their use in Friedländer condensation are described. This paper also focuses on the stability of these keto intermediates and emphasizes the major differences between indolizinones and pyrroloquinazolinones series. Noteworthy is also the report of some original structures isolated as by-products of some experiments.     

N-Heterocyclic carbene-palladacyclic complexes: synthesis,characterization and their applications in the C-N coupling and α-arylation of ketones using aryl chlorides

N-Heterocyclic carbene-palladacyclic complexes 3 were successfully achieved in a one-pot procedure under mild conditions. The structure of 3a was unambiguously confirmed by X-ray single crystal diffraction and it was an active catalyst in the Buchwald-Hartwig amination and α-arylation of ketones even at very low catalyst loadings (0.01?mol%).     

Iodine-mediated oxidative Pictet-Spengler reaction using terminal alkyne as the 2-oxoaldehyde surrogate for the synthesis of 1-aroyl-β-carbolines and fused-nitrogen heterocycles

An efficient iodine-mediated oxidative Pictet-Spengler reaction in dimethyl sulphoxide (DMSO) using terminal alkynes as the 2-oxoaldehyde surrogate for the synthesis of aryl (9H-pyrido[3,4-b]indol-1-yl)methanones is described. The scope of the protocol includes the total synthesis of Fascaplysin, Eudistomins Y₁ and Y₂. The methodology is extended for preparing pyrrolo[1,2-a]-quinoxaline and indolo[1,5-a]quinoxaline derivatives. The utility of 1-aroyl-β-carbolines was demonstrated by performing palladium-catalyzed β-carboline directed ortho-C(sp2)-H functionalization of the phenyl ring with thiomethyl (SMe) group using DMSO as source and for accessing 4-aryl-canthin-6-ones.     

Facile synthesis of bicyclic 1-arylpyrazol-5-ones

In this Letter, we described a facile method for constructing fused bicyclic 1-arylpyrazol-5-one ring system. We employed various methylene-containing carboxylic acids as the substrates and proved that the pyrazolone ring closure requires activated methylene group in intermediate II. Accordingly, a series of structurally diversified, fused bicyclic 1-arylpyrazol-5-ones was prepared in moderate to high yields using the requisite substrates.     

CoFe2O4自形成磁性液体场致结构化对磁化的影响

The Langevin paramagnetic theory can’t describe the relation between magnetization of ferrofluids and applied magnetic field. The structuralization of ferrofluids, which is considered the main influence factor of the magnetization, is regarded. The part of magnetization works is deposited when the structure is forming. This action influences the magnetization of ferrofluids directly or indirectly. On the base of the “compressing” model, the Langevin function that usually describes the magnetization of ferrofluid is modified, and a well-fitted curve is obtained. An equation of the relation between the equivalent volume fraction after being “compressed” and the intensity of magnetic field is discovered, which approximately describes the process of magnetization. The relation between the approximate initial susceptibility and the volume fraction can be obtained from modified formula.     

KMnO4-mediated oxidative CN bond cleavage of tertiary amines: Synthesis of amides and sulfonamides

KMnO₄-mediated oxidative CN bond cleavage of tertiary amines producing secondary amine was introduced, which was trapped by electrophiles (acyl chloride and sulfonyl chloride) to form amides and sulfonamides. The reaction could take place at mild condition, tolerating a wide range of function groups and affording products in moderate to excellent yields.     

Chemistry of heterocyclic compounds at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, over 50 years (Review)

The review contains a concise historical account and information on the most significant researches undertaken by the staff at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences on the Chemistry of Heterocyclic Compounds. Dedicated to Academician of the Russian Academy of Sciences B. A. Trofimov on his 70th jubilee. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1443–1502, October, 2008.