SOLID STATE SYNTHESIS AND CRYSTAL STRUCTURE OF THE CLUSTER COMPOUND［MwS_4Cu_3（PPh_3）_3Cl］（Mw＝0，56W＋0．44M0）

ＳＯＬＩＤ　ＳＴＡＴＥ　ＳＹＮＴＨＥＳＩＳ　ＡＮＤ　ＣＲＹＳＴＡＬ　ＳＴＲＵＣＴＵＲＥ　ＯＦ　ＴＨＥ　ＣＬＵＳＴＥＲ　ＣＯＭＰＯＵＮＤ［ＭｗＳ_４Ｃｕ_３（ＰＰｈ_３）_３Ｃｌ］（Ｍｗ＝０，５６Ｗ＋０．４４Ｍ０）ＳＯＬＩＤＳＴＡＴＥＳＹＮＴＨＥＳＩＳＡＮ...     

聚环氧氯丙烷聚氨酯／聚（甲基丙烯酸甲酯－苯乙烯）IPN的研究

改变聚（甲基丙烯酸甲酯－苯乙烯）（Ｐ（ＭＭＡ－ｃｏ－Ｓｔ）中甲基丙烯酸甲酯的含量（Ｗ_（ＭＭＡ）），通过一步法合成出聚环氧氯丙烷聚氨酯（ＰＵ（ＰＥＣＨ）／Ｐ（ＭＭＡ－ｃｏ－Ｓｔ）ＩＰＮ．ＤＳＣ、ＴＥＭ和动态粘弹谱研究结果表明：当Ｐ（ＭＭＡ－ｃｏ－Ｓｔ）中Ｗ_（ＭＭＡ）大于０．６时，ＩＰＮ仅有一个Ｔｇ；当Ｗ_（ＭＭＡ）小于０．４时，ＩＰＮ有２个Ｔ_ｇ，ＴＥＭ上出现相区，Ｐ（ＭＭＡ－ｃｏ－Ｓｔ）溶度参数（δ）及δ的氢键作用分量（δｈ）与相态、力学性能有密切关系。     

聚环氧丙烷聚氨酯／聚（甲基丙烯酸甲酯—苯惭烯）IPN的研究

改变聚（甲基丙烯酸甲酯－苯乙烯（Ｐ（ＭＭＡ－ｃｏ－Ｓｔ）中 甲基丙烯酸甲酯的含量（ＷＭＭＡ），通过一步法合成出聚环氧氯丙烷聚氨酯（ＰＵ（ＰＥＣＨ）／Ｐ（ＭＭＡ－ｃｏ－Ｓｔ）ＩＰＮ．ＤＳＣ、ＴＥＭ和动态粘弹谱研究结果表明：当Ｐ（ＭＭＡ＿ｃｏ－Ｓｔ）中ＷＭＭＡ大于０．６时，ＩＢＮ仅有一个Ｔｇ；当ＷＭＭＡ小于０．４时，ＩＰＮ有２个Ｔｇ，ＴＥＭ上出现相区，Ｐ（ＭＭＡ－ｃｏ－Ｓｔ）深度参数（δ）及δ的氢键作     

THE REACTION OF（μ_3－CPh）Co_3（CO）_9 WITH TRANSITION METAL CARBONYL ANION M（CO）_3（RCOCp）AND CHARACTERIZATION OF CLUSTERS（μ_3－CPh）CO_2M（CO）_8（RCOCPp）（M＝Mo，W；R＝H，CH_3．C_2H_5O）

ＴＨＥＲＥＡＣＴＩＯＮＯＦ（μ_３－ＣＰｈ）Ｃｏ_３（ＣＯ）_９ＷＩＴＨ　ＴＲＡＮＳＩＴＩＯＮＭＥＴＡＬＣＡＲＢＯＮＹＬＡＮＩＯＮＭ（ＣＯ）_３（ＲＣＯＣｐ）ＡＮＤＣＨＡＲＡＣＴＥＲＩＺＡＴＩＯＮＯＦＣＬＵＳＴＥＲＳ（μ_３－ＣＰｈ）ＣＯ_２Ｍ（ＣＯ）_８（ＲＣＯＣＰｐ）（Ｍ＝Ｍｏ，Ｗ；Ｒ＝Ｈ，ＣＨ_３．Ｃ_２Ｈ_５Ｏ）Ａｕｔｈｏｒｔｏｗｈｏｍｃｏｒｍｓｐｏｎｄｅｎｃｅｓｈｏｕｌｄａｄｄｒｅｓｓｅｄ．ＥｘｐｅｒｉｍｅｎｔａｌｓｅｃｔｉｏｎＧｅｎｅｒａｌｐｒｏｃｅｄｕｒｅａｎｄｍａｔｅｒｉａｌＡｌｌｏｐｅｒａｔｉｏｎｗａｓｃａｒｒｉｅｄｏｕｔｕｎｄｅｒｈｉｇｈｌｙｐｕｒｅｎｉｔｒｏｇｅｎａｔｍｏｓｐｈｅｒｅｕｓｉｎｇｓｈａｄａｒｄＳｃｈｌｅｎｌｃａｎｄｖａｃｕｕｍｔｅｃｈｎｉｑｕｅｓ．Ｈｅ－ｃａｎｅ，ｂｅｎｚｅｎｅａｎｄｔｅｔｒａｈｙｄｒｏｆｕｒａｎｗｅｒｅｐｒｅｄｒｉｅｄｏｖｅｒｓｏｄｉｕｍｗｉｒｅａｎｄｄｉｓｔｉｌｌｅｄｆｒｏｍｓｏｄｉｕｍ－ｂｅｎｚｏｐｈｅｎｏｎｅｕｎｄｅｒｎｉｔｒｏｇｅｎ．ＮａＭ（ＣＯ）３（ＲＣＯＣＰ）ａｎｄＰｈＣＣｏ３（ＣＯ），ｗｅｒｅｐｒｅｐａｒｅｄａｃｃｏｒｄｉｎｇｔｏｌｉｔｅｒａｔＵｒｅ     

簇合物〔WOS_3Cu_3(V-pic)_6〕Br 的合成和晶体结构

簇合物〔ＷＯＳ３Ｃｕ３（γ－ｐｉｃ）６〕Ｂｒ（Ｃ３６Ｈ４２ＢｒＯＮ６Ｓ３Ｃｕ３Ｗ, Ｍｒ＝ １１２５．３４） 属于三方晶系,空间群为Ｐ３,晶胞参数为：ａ＝ １２．２６４（５）, ｃ＝ １５．９０５（８） , γ＝ １２０．００°, Ｖ＝２０７１（２）３, μ（ＭｏＫα）＝ ５．４９０ｍ ｍ － １, Ｚ＝ ２, Ｄｃ＝ １．８０４ｇ／ｃｍ ３, Ｆ（０００）＝ １１０４ , Ｒ＝ ０．０５２ , ｗ Ｒ＝ ０．０５３． 可观察衍射点１９０１ （Ｉ≥２σ（Ｉ））。该簇合物的分子由游离的阴离子Ｂｒ－ 和簇阳离子〔ＷＯＳ３Ｃｕ３（γ－ｐｉｃ）６〕＋ 构成。阳离子中的Ｗ 原子、Ｓ原子和Ｃｕ原子构成１ 个巢状骨架结构,且该结构中存在一个通过Ｗ 和Ｏ原子的Ｃ３ 轴。     

淋必治的极谱研究

在０．１ｍｏｌ／Ｌ ＨＡｃ－ＮａＡｃ（ｐＨ４．５０）支持电解质中，淋必治（ＳＰＥ）有一灵敏的示波极谱导数还原峰，峰电位Ｅｐ＝－０．９８Ｖ（ｖｓ．ＳＣＥ）。峰电流与ＳＰＥ的浓度在２．０×１０＾－７￣８．０×１０＾－５ｍｏｌ／Ｌ范围内呈线性关系，最低检出限为５．０×１０＾－８ｍｏｌ／Ｌ。该法用于注射针剂中ＳＰＥ含量的测定。，结果良好。文中对ＳＰＥ的极谱行为、电极过程及反应机理进行了探讨。     

CONVERSION OF METHANE AND CARBON DIOXIDE TO AROMATICS OVER CHROMIUM-BASED CATALYSTS:SELECTIVITY AND YIELD OF MAIN PRODUCTS

在８４０℃，０．５ＭＰａ，ＣＨ４／ＣＯ２摩尔比为１．４，接触时间（Ｗ／Ｆ）为０．７９ｈ·ｇ·Ｌ－ｌ的条件下，甲烷和二氧化碳在７．５ｗｔ％Ｃｒ／５．０ｗｔ％Ｎａ／ＳｉＯ２催化剂上共活化得到了４．８％的Ｃ２选择性，４８．７％的芳烃选择性及１．９％的芳烃收率。在钠修饰的铬基催化剂上，成功地一步实现了ＣＨ４和ＣＯ２转化为乙烯及中间物乙烯聚合为芳烃的过程     

混合三烃基锡有机酸酯化合物构效关系 （Ⅰ）二环己基－甲基－2，4－二溴－β－甲基苯氧乙酸锡酯 及二环己基－甲基－2－甲氧基－4－丙烯基苯氧乙酸锡酯的晶体结构和分子结构

报道２，４－Ｂｒ２Ｃ６Ｈ３ＯＣＨ（ＣＮ３）ＣＯ２Ｓｎ（Ｃ６Ｈ１１）２ＣＵ３（１）和２－ＯＣＨ３－４－ＣＨ３ＣＨ＝ＣＨＣ６Ｈ３ＯＣＨ２ＣＯ２Ｓｎ（Ｃ６Ｈ１１）２ＣＨ３（Ｈ２Ｏ）（Ⅱ）的晶体结构和分子结构。（Ⅰ）单斜晶系，空间群Ｐ２１／ｃ，ａ＝１３．０６７（３），ｂ＝１０．５９４（３），ｃ＝１８．１５７（４），β＝１０６．９９（２）°，Ｚ＝４，Ｄｃ＝１．６７２ｇ／ｃｍ３，Ｖ＝２４０３．７３，μ＝４３．７３１ｃｍ－１，Ｍｒ＝６２２．９９，Ｆ（０００）＝１２３２；（Ⅱ）单斜晶系，空间群Ｐ２１／ｎ，ａ＝１０．４０９（１），ｂ＝　１２．５７０（２），ｃ＝２０．６６４（２），β＝８３．５１（１）°，Ｚ＝４，Ｄｃ＝１．２８１ｇ／ｃｍ３，Ｖ＝２６８６．４Ａ３，μ＝９．７６１ｃｍ－１，Ｍｒ＝５３９．２８，Ｆ（０００）＝１１２０．最后的偏离因子，化合物（Ⅰ）Ｒ＝０．０４６，Ｒω＝０．０４６；化合物（Ⅱ）Ｒ＝０．０４９，Ｒω＝０．０４７。晶体结构解析表明，化合物（Ⅰ）和（Ⅱ）中的锡均被配体的３个碳和２个氧原子配位，配位原子呈畸变三角双锥构型；化合物中的环己基均为椅式构象；化合物（Ⅱ）中，配位水分子和另一分子的羰基氧与芳环上的甲基氧?     

头孢噻肟钠降解产物在银微电极上示差脉冲阴极溶出伏安法的测定

基于包噻肟钠（ＣＴＸ）在０．１０ｍｏｌ／Ｌ ＮａＯＨ溶液中水浴降解产物含有巯基（－ＳＨ），在ＰＨ４．５ＮａＡｃ－ＨＡｃ介质中，于奶微电极上产生－灵敏的吸附伏安还原峰，峰电位Ｅｐ＝－０．５５Ｖ（ｖｓ．ＳＣＥ）。示差脉冲溶出峰电流与ＣＴＸ浓度在１．０＊１０＾－７－１．０＊１０＾－５ｍｏｌ／Ｌ范围内呈线性关系，方法可应用于模拟样品ＣＴＸ的检测，令人满意。     

不饱和聚酯／聚氨酯复合体系的研究

以端羟基不饱和聚酯（ＨＵＰ）与聚氨酯（ＰＵ）浇注型复合网络聚合物（ＣＰＮｓ）为基材，考察了化学动力学及相分离对ＣＰＮ聚合物物理机械性能的影响．数据揭示了不饱和聚酯／聚附聚氨酯（ＨＵＰ／ＰＵ－ｅｓ）ＣＰＮ，当ｒ＝ＮＣＯ／ＯＨ＝０．４时，它的物理力学性能优于不饱和聚酯／聚醚聚氨酯（ＨＵＰ／ＰＵ－ｅｔ）ＣＰＮ或ＨＵＰ／ＰＡＰＩＣＰＮ组成物．最佳ＣＰＮ可通过调整聚氨酯中软段和硬段组分及网络组成而设计与制备．     

A carbanion induced synthesis of highly congested pyrazole and imidazole containing heterocycles

An efficient approach to the synthesis of highly congested di, penta and hexacyclic pyrazoles as well as imidazole fragment containing novel heterocyclic molecule has been developed through a carbanion induced transformation of suitably functionalized 2H-pyran-2-ones, benzo[h]chromene and thiochromeno[4,3-b]pyrans. Due to the presence of fluorescence, we report their prime application metal sensor as off/on switching in ferric ions.     

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.     

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%).     

Selective synthesis of 4,5-dihydroimidazo- and imidazo[1,5-a]quinoxalines via modified Pictet–Spengler reaction

An efficient tandem approach for the selective synthesis of 4,5-dihydroimidazo[1,5-a]quinoxalines 6a–g and imidazo[1,5-a]quinoxalines 7a–h by the reaction of 2-imidazolyl anilines 4a–c with aryl aldehydes 5a–k under mild reaction conditions is described. Introduction of electron releasing alkyl groups in substrates 4a–b was found to be instrumental for the success of the reaction.     

Understanding the Diels-Alder reactivity of 1,2-azaborine analogues

The Diels-Alder reactivity of 1,2-heteroborines (H₄C₄B(H)X, X?=?NH, PH, AsH; O, S, Se) has been computationally explored by means of Density Functional Theory (DFT) calculations. The influence of the HB?=?X fragment on the reactivity of the system has been quantitatively analyzed in detail by means of the so-called Activation Strain Model (ASM) of reactivity. It is found that the interaction between these species and the dienophile is significantly stronger than that computed for their all-carbon isoelectronic counterpart, benzene. In addition, the strain energy plays a key role in the observed reactivity trends. The role of the aromaticity strength of these heteroarenes on the reactivity is also assessed.     

Synthesis of N-substituted carbazolones from α-iodo enaminones via Pd(0)-catalyzed intramolecular coupling under microwave irradiation

A variety of N-aryl and N-alkyl carbazolones were conveniently achieved in good to high yields via Pd₂(dba)₃-mediated intramolecular coupling of N-substituted α-iodo enaminones under microwave irradiation. The Pd(0)-catalyzed cyclization was found to proceed favorably with the more electron-deficient phenyl ring during the reactions involving unsymmetrical N,N-diaryl α-iodo enaminones. This unique property enables the construction of carbazolone skeleton containing nitro substituted benzenoid ring.     

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.     

Synthesis of substituted 2,4,5,6-tetrahydrocyclopenta[c]pyrazoles and 2,4,5,6-tetrahydropyrrolo[3,4-c]pyrazoles by intramolecular nitrilimine cycloaddition

Both substituted 2,4,5,6-tetrahydrocyclopenta[c]pyrazoles and 2,4,5,6-tetrahydropyrrolo[3,4-c]pyrazoles have been synthesized by the 3+2 intramolecular dipolar cycloaddition of nitrilimines to alkynes. This cyclization has been extended to more versatile 3-bromo derivatives by the use of alkynylbromides as dipolarophiles.     

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.