4-(S)-[2-(N-甲基)吗啉基 ]-5-(R )-(l-薄荷烷氧基 )-丁内酯结构分析

N－甲基吗啉对5－（l－薄荷烷氧基）－2（5H）－呋喃酮的光催化不对称共轭加生成了4－（S）－[2－（N－甲基）吗啉基]－5－（R）－(l－薄荷烷氧基）－丁内酯,在四氢呋喃（THF）对比实验、参比物^13CNMR对照及不同溶剂^13CNMR测定的基础上,该新化合物的结构用高分辨率的子核磁共振谱、碳核磁共振谱、质谱、红外光谱及元素分析、旋光度等数据进行了确证。     

Spectroelectrochemical studies of [Mo(dtc)_4][Eu(dtc)_4] and [Mo(dtc)_4][Er(dtc)_4]

Redox and spectroscopic properties of the eight-coordination complexes of molybdenum and the rare-earth elements Eu or Er with N,N-diethyldithiocarbamate (dtc) were characterised by cyclic voltamrnetry and UV-visible absorption spectra.The complex cation [Mo(dtc)4]+ is more stable than the complex anions [Eu(dtc)4]-and [Er(dtc)4]-in redox processes,and possesses good redox reversibility.The electron transfer number,formal standard electrode potential in the redox process for the complex cation and its diffusion coefficients were obtained by in aitu spectroelectro-chemistry.     

[Ho_2(phen)_4(H_2O)_4(OH)_2](phen)_2(NO_3)_4的合成、晶体结构及磁性

在甲醇与水的混合溶剂中,经浓硝酸硝化的Ho_2O_3与1,10-邻菲啰啉反应形 成氢氧根桥联的双核钬配合物[Ho_2(phen)_4(H_2O)_4(OH)_2] (phen)_2(NO_3)_4 （phen = 1,10-邻菲啰啉）。单晶X射线衍射晶体结构测定表明晶体属三斜晶系, P1-bar (no. 2)空间群,晶胞参数a = 1.1241(1) nm, b = 1.1439(1) nm, c = 1. 4058 (1) nm, α = 93.989(7)°, β = 98.173(7)°, γ = 108.19(1)°, V = 1.6874(4) nm~3, Z = 1, D_c = 1.737 g/cm~3, F(000) = 880,7752个独立衍射 点中,5702个可观测点满足F_o~2 ≥ 2σ (F_o~2),R_1 = 0.0499, wR_2 = 0. 858。标题配合物由中心对称的双核[Ho_2(phen)_4(H_2O)_4-(OH)_2]~(4+)配阳离 子,邻菲啰啉phen分子及硝酸根NO_3~-阴离子组成。敏个稀土原子与2个邻菲啰啉 配体,2相水分子和2个氢氧根配位形成配位数为8的[HoN_4O_4]四方反棱柱。配位 多面体通过两氢氧根基团形成共棱的[Ho_2N_8O_6]双四方反棱柱[d(Ho-N) = 0. 2549～0.2565 nm, d(Ho-O_(H_2O) = 0.2356, 0.2366 nm, d(Ho-O_(OH)) = 0. 2223, 0.2240 nm]。通过氢键和芳环堆积作用,配阳离子和邻菲啰啉分子排列形成 平行于（10 1-bar）的两维层结构,NO_3~-阴离子位于层之间。标题配合物为顺磁 物质,在5 ～300K区间内遵循Curie-Weiss定律X_m (T + 4.43) = 14.72 cm~3·K ·mol~(-1)(X_m为每摩尔Ho~(3+)离子磁化率）,其Ho~(3+)离子的室温有效磁矩为 10.76 B. M.,与Ho~(3+)自由离子的磁矩基本相同,表明稀土离子间不存在磁交换 作用。     

CRYSTAL STRUCTURE OF W_4(μ_(3-)S)_4[S_2P(OEt)_2]_6

<正> W4S4 [S2P (OEt)2]6, Mr= 1974. 94, triclinic, P1, a = 14. 063 (5) , b = 16. 289(4), c= 13. 377(3) A ,α=92. 06 (2), β=95. 24(3), γ= 73. 06(2)°, V= 2919(3)A3,Z=2,DC=2. 18g/cm3, Moka radiation,λ =0. 71069A ,μ = 90. 64cm-1, F(000) = 1764,R=0. 053 and Rw = 0. 069 for 5422 reflections with I≥3σ(I).The title compound is comprised of a cubane-like cluster core [W4S4] in which every W atom is coordinated by six S atoms to form a distorted octahedron.     

(dmpe)_2HCrBH_4、(dmpe)_2HCrAIH_4和[(dmpe)_2HCrAIH_4]_2的电子结构

本文用CNDO/2方法研究了(dmpe)_2H_tCrBH_4(Ⅰ)、(dmpe)_2H_tCrAlH_4(Ⅱ)和[(dmpe)_2H_tCrAlH_4]_2(Ⅲ)(dmpe=(CH_3)_2PCH_2CH_2P(CH_3)_2,在计算时,我们用二个PH_3代替一个(dmpe)的电子结构。结果表明:(1)在(Ⅱ)的6b_1(HOMO),7a_1占据轨道中,Cr3d轨道与2H_b1S轨道(H_b为桥氢原子)对称性不匹配,相互排斥,而在(Ⅰ)中这种排斥有所减弱;Cr(u-H_b)_2Al骨架较Cr(u-H_b)_2B能量高而不稳定。(2)在(Ⅲ)的电子结构中Cr3d与2H_b1S之间排斥大为减弱,Cr(u-H_b)_2Al稳定性提高;新形成的AL(u-H)_2AL能量较低;在较高占据轨道中H_t和H_b成份多,活泼性强,这可能是H_t和H_b易交换的主要原因。三个化合物在电子结构上的差异较合理解释了实验现象。     

SYNTHESES AND CRYSTAL STRUCTURES OF (Et_4N)_2(Fe_2Se_2(SPh)_4) AND (Et_4N)_2(Fe_4Se_4Cl_4)

<正> Since the discovery of iron-sulfur proteins , a number of analogous compounds of the active sites of iron-sulfur proteins has been synthesized and characterized . Due to the similarity between sulfur and selenium, some selenoproteins with similar active site as iron-sulfur proteins were found . We have synthesized a series of iron-selenium compounds in correlative study with the iron-sulfur compounds. In this paper, we will discuss the syntheses and crystal stuctures of the title compounds. The spectroscopic properties of these compounds have been under investigation.     

四核钼簇合物的配体取代反应及产物Mo_4S_4(μ-OAc)_2(dtp)_4的晶体结构

标题化合物(Ⅰ)经由Mo_4S_4(μ-dtp)_4(Ⅱ)[dtp=S_2P(OEt)_2]和Ni(OAc)_2反应而得。(Ⅰ)晶体属单斜晶系,空间群P2/c,a=13.176(4),b=11.699(3),c=18.526(4)(?),β=116.11(3)°,V=2564(3)(?)~3,Z=2,D_c=1.776g·cm~(-3)。晶体结构由直接法解出,最终偏离因子R=0.085。本文结果表明,可由已知的四核钼簇合物经过配体置换反应,合成得到其簇骼中心[Mo_4S_4]保持不变并具有-OAc作为桥式配体和-dtp作为端基配体的混合配体类立方烷[Mo_4S_4]簇合物。     

SYNTHESIS AND CRYSTAL STRUCTURE OF Mo_20_2S_2(Py)_4(Mo0_4)

<正> Introduction. A series of trinuclear molybdenum clusters has been synthesized and identified. Most of them have almost the sameMo-Mo distance. We have synthesized another kind of trinuclear molybdenum complex which has different Mo-Mo distances and can be comsidered as composed of the complex (Mo_2O_2S_2(py)_4)~2+ and the molbdenic ion (MoO_4)~2-. This paper reports the synthesis and structure of the title compound.     

A New Tetranuclear Silver Complex [Ag_4(MMPzA)_2(dmPz)_4(H_2DPC)_2](H_2O)_4 and Its Antibacterial Activity

A new tetranuclear silver(I) complex with the formula of [Ag_4(MMPzA)_2(dmPz)_4(H_2DPC)_2](H_2O)_4(1, MMPz A = mono(3,5-bimethyl-pyrazolmethyl)amine), dm Pz = 3,5-dimethylpyrazole, H_2DPC = pyridine-3,4-dicarboxylic acid) has been synthesized and characterized by single-crystal X-ray diffraction method. The title complex crystallizes in the triclinic system, space group P1 with a = 10.5532(13), b = 11.5071(18), c = 13.3951(17) ?, α = 97.3190(10), β = 106.7360(10), γ = 108.0770(10)o, V = 1438.3(3) ?3, Z = 1, Dc = 1.691 g/cm3, F(000) = 736, μ = 1.421 mm-1, the final R = 0.0400 and w R = 0.0942 for 5097 observed reflections(I 2σ(I)). The intermolecular hydrogen bonding interaction extends the complex into a 1D chain structure. In addition, the complex was tested in vitro for its antibacterial activity and it exhibited significant activity, especially against penicillium.     

CRYSTAL STRUCTURE OF COMPLEX OF ERBIUM(Ⅲ) AND QLYCINE,[Er(GLy)_2(H_2O)_4]_2(ClO_4)_6·4(C_4H_8O_2)

<正> The crystal structure of [Er(Gly)2 (HaO)4]2(ClO4)6.4(Dio) (Gly= NH2CH2COOH; Dio=dioxane) has been determined belonging to triclinic system with space group P1.The final R was 0.055. The carboxyl groups of Gly are associated to Er(Ⅲ) atoms to act as the bidentate bridging ligands.     

CRYSTAL STRUCTURE OF Fe4S4[SC（CH3）3]4[（C4H9）4N]2

<正> Fe_4S_4[SC(CH_3)_3]_4[(C1H_9)_2,Mr=1193. 23,tetragonal,142d,a = 23. 272(2), c= 13. 080(5) A ,V=7084(3) A3,Z=4,DC=1. 12g·cm-3,UUUU(MoKa) = 10. 8cm-1,F(000) = 2568,R=0. 058 for 1005 observed reflections. The cluster anion contains a cubane-type Fe4S4 core compressed along the 4 axis which is crystallographically imposed. Compared to other salts with different cations ,the core is subject to slight structural distortions in different crystalline environments and crystallographic symmetry of the anion is related to that of the cation.     

CRYSTAL STRUCTURE OF Mo_2(u-S)_2(S_2P(OEt)_2)_4

<正> Mr=996.91, triclinic, P1, a=8.773(2), b=9.712(3), c=13.652(1) A; α=69.24(0), β=70.43(3), γ=66.87(l)°; Z=l, Dx=1.699 g/cm 3. Final R=0.053 for 3186 reflections with I≥3a(I). There is an interesting trans influence of μ-s bridge in this binuclear cluster. Mo-Mo distance is 2.752(1) A.     

{[Sm_2(Gly)_6(H_2O)_4](ClO_4)_6(H_2O)_5}_n的合成和晶体结构

本文合成了标题配合物,对其红外光谱进行了研究.测定了配合物的晶体结构,结果表明,晶体属三斜晶系,P1空间群,单胞参数:α=11.549(2)(?),b=14.122(3)(?),c=15.654(?),α=97.01(2)°,β=102.70(2)°,γ=105.43(2)°,V=2355.94(0.87)(?)~3,Z=2.晶体结构是采用Patterson法和差值Fourier合成解出.经全矩阵最小二乘法修正,最后偏差因子R=0.0337,R_w=0.0364.晶体中甘氨酸与Sm原子的结合方式有三种:第一种甘氨酸的羧基离子以螯合桥式与Sm原子配位;第二种甘氨酸以羧基桥式与同一单元的两个Sm原子配位;第三种甘氨酸以酸基桥式连结两个相邻单元中的相邻Sm原子而形成一维无限长链结构.此外,每个Sm原子还与两个水分子成键,其配位数为9.     

[Li(THF)_4][GdCl_4(THF)_2]的晶体结构

氯化钆与对-甲基苯基锂在四氢呋喃中反应得到产物之一为[Li(THF)_4][GdCl_4-(THF)_2],(M_r=738.2),在-70℃下进行X-射线衍射研究。其晶体属单斜晶系,P2/n空间群。晶体学参数为a=13.263(2),b=8.474(1),c=14.961(0);β=99.72(1)°,V=1657.23(?)~3,Z=2,D_c=1.48g/cm~3,F(000)=750,μ_c=24.2cm~(-1),最终偏离子为R=0.0614。研究结果表明,本题晶体是离子型晶体,围绕Gd~(3+)的四个Cl~-离子和两个THF分子的氧原子构成畸变的八面体。Li~+周围的四个THF分子的氧原子构成一个近似的四面体。     

［（n－C_4H_9）_4N］_2［（OC_（14）H_8O）_2Mo_4O_（10）（OCH_3）_2］的合成和晶体结构

为探讨钼多酸根阴离子在有机化学反应中的催化机理，用菲醌作底物合成了［（ｎ－Ｃ_４Ｈ_９）_４Ｎ］_２［（ＯＣ_（１４）Ｈ_８Ｏ）_２Ｍｏ_４Ｏ（１０）（ＯＣＨ_３）_２］配合物。Ｘ射线单晶结构分析表明，该晶体属单斜晶系，空间群Ｐ２_１／ｃ，ａ＝１．３１４９（５）ｎｍ，ｂ＝１．８６６６（８）ｎｍ，ｃ＝１．８９０３（３）ｎｍ，β＝１０４．０６（３）°，Ｚ＝２．收集到独立衍射点３５０５个，其中１３８２个为可观测点，最终一致性因子Ｒ＝０．０７８．结构分析结果表明，菲醌与钼多酸根在不同的实验条件下，能形成配比、氧化态以及结构不同的配合物。     

Synthesis and Structure of Ion-pairComplex［Mo （dtc）_4］［Sm （dtc）_4］

ＳｙｎｔｈｅｓｉｓａｎｄＳｔｒｕｃｔｕｒｅｏｆＩｏｎ－ｐａｉｒＣｏｍｐｌｅｘ［Ｍｏ（ｄｔｃ）＿４］［Ｓｍ（ｄｔｃ）＿４］ＳＵＮＣｈｕｎ－ｔｉｎｇ，ＺＨＵＹａ－ｂｉｎ，ＬＩＵＸｉａｏ－ｘｕｎａｎｄＹＩＳｈｕｚｈｅｎ（ＣｈｅｍｉｓｔｒｙＤｅｐａｒｔｍｅｎ...     

Synthesis and Structure of [Cu（OH）2（H2O）2（4—C5H4N—COOH）2]

1 INTRODUCTION Supramolecular chemistry and crystal engineering of coordination compounds have attracted considerable interests nowadays owing to the fascinating structural diversity and potential applications as functional materials[1,2]. Generally, architectures of supramolecules are formed through hydrogen bonds, ?- ?stacking interaction or other weak interactions between the molecules. Recently, many supramolecular compounds containing silver(I) and copper(II) species have been re-…     

Synthesis and Crystal Structure of［（n－Bu）_4N］_2［Mo_4O_（10）（OC_（10）H_6O）_2（OCH_3）_2］

ＳｙｎｔｈｅｓｉｓａｎｄＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆ［（ｎ－Ｂｕ）_４Ｎ］_２［Ｍｏ_４Ｏ_（１０）（ＯＣ_（１０）Ｈ_６Ｏ）_２（ＯＣＨ_３）_２］￥ＬｕＸｉａｏ－Ｍｉｎｇ；ＺｈｕＨｕｉ－Ｊｕ；ＹａｎｇＮｉｎｇ；ＬｉｕＳｈｕｎ－Ｃｈｅｎｇ；ＪｉｎＸ?..     

Synthesis and Crystal Structure of （SiCl3）2Fe（CO）4

The compound （SiCl3）2Fe（CO）4 was synthesized and structurally characterized by X-ray single-crystal diffraction. It crystallizes in monoclinic, space group P2 1/n with α = 8.287（2）, b = 9.829（2）, c = 9.042（2） A, β = 96.19（3）°, V= 732.2（3） A^3, C4Cl6FeO4Si2, Mr = 436.77, Z = 2, Dc = 1.981 g/cm^3, F（000） = 424, μ（MoKα） = 2.282 mm^-1, the final R = 0.048 and wR = 0.164 for 1109 observed reflections （I 〉 2σ（I））. The crystal structure of （SiCl3）2Fe（CO）4 reveals that the Si（l）- Fe-Si（l）^a sequence is linear and perpendicular to the Fe（CO）4 cross-shaped plane.     

SYNTHESIS AND STRUCTURE OF (Et_4N)_2[Ni_2(OSC_5H_4)_2(μ-SC_6H_4OH)_2]

<正> The synthesis and structure of cluster compound(Et4N)2[Ni2-(OSC6H4)2(u-SC6H4OH)2] are reported. Mr = 876.54,space group P21/n, a = 9.179(4), b = 17.487(6), c = 12.840(4) A;B=92.87(3)°;V=2058.6(2)A3; Z = 2; DC = 1.182g·cm-3.