Crystallization and preliminary X-ray analysis of an anti-insect toxin BmK I6 from Buthus martensii Karsch scorpion

An excitatory anti-insect toxin from BmK scorpion, named BmK I6, has been purified and crystallized recently. Two crystal forms have been obtained by using ammonium sulfate as precipitant at different pH, one of which is single crystal. Diffraction data have been collected for the single crystal on a Mar Research 345 Image Plate. The analyses of the data show that the crystal can diffract to 0.28 nm resolution and belongs to the space group C2 with unit cell parameters a = 4.65 nm, b = 8.52 nm, c = 3.26 nm, α = γ = 90° ,β = 110.5° . There are 2 molecules per asymmetric unit according to its unit cell volume and molecular weight.     

Crystallization and preliminary X-ray analysis of an anti-insect toxin BmK 16 fromButhus martensii Karsch scorpion

An excitatory anti-insect toxin from BmK scorpion, named BmK 16, has been purified and crystallized recently. Two crystal forms have been obtained by using ammonium sulfate as precipitant at different pH, one of which is single crystal. Diffraction data have been collected for the single crystal on a Mar Research 345 Image Plate. The analyses of the data show that the crystal can diffract to 0.28 nm resolution and belongs to the space group C2 with unit cell parameters a = 4.65 nm,b = 8.52 nm,c = 3.26 nm, α = γ = 90°, β = 110.5°. There are 2 molecules per asymmetric unit according to its unit cell volume and molecular weight.     

Dawson结构［（C6H4N4）2·P2W18O62·11（H2O）］的合成、表征、晶体结构

由联咪唑与K6 P2 W18 O62· nH2 O合成了基于Dawson型杂多化合物[（ C6 H4 N4）2· P2W18O62·11（H2O）],并通过元素分析、X-射线单晶衍射仪、红外光谱等确定了该化合物的晶体结构．单晶结构解析结果表明晶体属单斜晶系,空间群为C2/C,晶胞参数：a＝2．26349（13）, b＝1．43798（8）, c＝2．19657（12）,β＝97．4400（10）,Z ＝4,V＝7．0893（7） nm3,R1＝0．0545,ωR2＝0．1540．化合物分子由一个P2 W18 O62阴离子、两个联咪唑和11个水分子组成．     

阳离子-π相互作用:[K(18C6)][BPh4] 的合成与晶体结构

合成了冠醚配合物:[K(18C6)][BPh_4],通过元素分析、红外光谱、单晶X-射线衍射对配合物结构进行了表征,该配合物为单斜晶系,空间群P2(1)/n,晶体学数据:α=1.454 8(4)nm,b=1.395 6(4)nm,c=1.749 7(6)nm,β=111.254(5)°,V-3.311 0(18)nm~3,Z=4,F(000)=1 328,R_1=0.079 7,ωR_2=0.204 7.配阳离子[K(18C6)]~+中的K~+与[BPh_4]~-中的其中一个苯环存在K~+-π相互作用.     

香草醛缩氨基硫脲合Ni(Ⅱ)配合物的合成及晶体结构(英文)

利用X-射线单晶衍射技术测定了香草醛缩氨基硫脲合镍(Ⅱ)配合物甲醇溶剂化物Ni(C9H10N3O2S)2.4CH3OH)的单晶结构。测定结果表明,该晶体属单斜晶系,C2/c空间群,晶胞参数分别为a=2.571 2(6),b=0.730 41(18),c=1.656 3(4)nm,β=104.212(4)°,V=3.015 4(13)nm3,Z=4.在晶体结构中,中心离子Ni(Ⅱ)与2个配体中的N、S原子形成四配位的平面四边形结构,配体在与Ni(Ⅱ)配位时,其结构发生硫酮式与硫醇式互变异构,最终以硫醇阴离子形式与Ni(Ⅱ)配位,因而得到中性配位单元.相邻配位单元通过N3-H3A…S1氢键形成一维链状结构;甲醇分子既作为质子的受体又作为质子的给体,每个配位单元通过多重O-H…O、N-H…O氢键形成溶剂化物,生成沿ab平面的氢键二维结构;计算表明,包结在其中的甲醇客体构成一维孔道结构,占据晶格体积的35.4%.     

Crystallographic Studies of Cephalosporin Acylase from Pseudomonas sp. Strain 130

The cephalosporin acylases are a group of enzymes that hydrolyze cephalosporin C and/or glutaryl 7-aminocephalosporanic acid to produce ?-aminocephalosporanic acid. The cephalosporin acylase from Pseudomonas sp. strain 130 was crystallized in two different forms suitable for structural studies. A tetragonal crystal form diffracted to 0.24 nm belonged to the space group P41212. There was one αβ heterodimer per asymmetric unit. A second crystal form diffracted to 0.21nm belonged to the space group P21. There was four αβ heterodimers per asymmetric unit. The tetragonal crystal structure of CA-130 was determined using the multiwavelength anomalous diffraction method and the P21 crystal structure was then determined using the molecular replacement method.     

榄钱两株附生真菌混合培养次级代谢产物研究

 通过混合培养2株附生于南海榄钱的真菌产生了2个抗菌次级代谢产物(A和B),其结构通过完整的波谱数据(主要是2D NMR数据)分别解析为新曲霉酸(A)和曲酸(B)。化合物B的结构进一步通过单晶X-射线衍射分析得到证实。当单独培养这2株真菌时未能得到化合物A。研究结果进一步表明,混合培养技术有助于从海洋微生物中发现更多独特的天然产物。     

一种新型Fe(Ⅱ)异烟肼配合物的合成与晶体结构

以异烟肼和硫酸亚铁为原料,在二甲基亚砜(DMSO)溶液中合成了一种新型的Fe(Ⅱ)配合物.该配合物的晶体结构通过单晶体X-射线衍射分析、红外光谱、热重分析进行了表征.晶体属于单斜晶系,P21/c空间群.晶胞参数:a=1.26047(12)nm,b=2.5607(2)nm,c=1.20134(10)nm,β=92.781(5)°,V=3.8730(6)nm3,Z=4,μ(MoKα)=0.932 mm-1,F(000)=1808.0,R1=0.0677,wR2=0.2575[I>2σ(Ⅰ)].每个Fe(Ⅱ)原子分别位于一变形的配位八面体中心.两个Fe(Ⅱ)原子通过两个SO24-桥连,形成双核结构,每个八面体的剩余4个配位点分别与两个异烟肼的端基N原子和羰基O原子配位.     

1,6,7,12,13,18-六氮杂三萘撑的一种新晶型研究:菱形主体通道与客体溶剂分子包结

采用低温X-射线单晶衍射技术测定了化合物1,6,7,12,13,18-六氮杂三萘撑的一种新晶型.研究结果表明,标题化合物1·2CH3OH·2H2O处于正交晶系,Pccn空间群,晶胞参数为a=2.3797(4)nm,b=0.38404(7)nm,c=2.3242(5)nm,V=2.1241(7)nm3,Z=4.每个主体分子1同时与2个甲醇和2个水溶剂客体分子结晶,主体分子之间存在显著的芳环堆积作用,在晶胞中呈平行排列并形成大的菱形通道,客体分子位于此通道中.此外,客体分子之间存在O-H…O氢键相互作用,进一步稳定了此三维超分子结构.     

吡唑-3-甲酸银、铅配位聚合物的合成、晶体结构和荧光性质

用水热法合成了吡唑-3-甲酸的两个配合物{[Ag(Py-3-CA)]n(1)和[Pb2(Py-3-CA)4]n(2)}(Py-3-CA=吡唑-3-甲酸),用X射线单晶衍射仪测定了配合物的晶体结构,并对其进行了红外光谱、元素分析、X射线粉末衍射、荧光等性质的表征.结果表明:配合物1属于单斜晶体,P21/c空间群,晶胞参数a=0.859 97(4)nm,b=0.576 70(2)nm,c=1.012 87(4)nm,β=97.673(4)°,V=0.497 83(4)nm3,Z=4;晶体2属于单斜晶体,P21/c空间群,晶胞参数a=1.107 64(3)nm,b=2.366 60(6)nm,c=0.863 20(2)nm,β=110.313(3)°,V=2.122 02(10)nm3,Z=4.配合物中的氢键作用使其自组装成稳定的三维立体结构.荧光测试结果表明,配合物1和2具有荧光性质.     

Two-dimensional crystallization and preliminary electron crystallographic result of partially purified Fo from porcine mitochondria

After removal of cytoplasmic sector F1 from submitochondrial particles of FoF1-ATP synthase complex with guanidine hydrochloride, the transmembrane sector Fo was specifically extracted from the stripped membranes in the presence of detergent CHAPS and partially purified.Two-dimensional crystals were produced by the reconstitution of the partially purified Fo into asolectin and microdialysis. The obtained crystals are able to diffract to 2 nm. The projection map of the negatively stained crystal shows that the crystal has p4212 symmetry, lattice constant, a = b = 14.4nm. A unit cell contains four Fo molecules.     

2-苯基4-硒唑甲酸铜配合物的合成及其与DNA的作用

在水溶液中,由硝酸铜和2一苯基4-硒唑甲酸（HL）合成了配合物NH4[Cu2L5]HL·6H20;用元素分析、红外光谱、摩尔电导率和热重分析方法对配合物进行了表征,用单晶X-射线衍射方法测定了配合物的晶体结构．该配合物C60H53Cu2N70188Se6属于三斜晶系,空间群P-1,a=1．36868（9）nm,b=1．50696（9）nm,c=1．82897（12）nm,a=103．200（4）°,β=100．264（4）°,γ=111．054（4）°,V=3．2839（4）nm^3,Z=2,M,=1760．94,F（000）：1736,De=1．781g·cm^3,p（MoKa）=4．048mm^-1．用溴化乙锭荧光探针法测试了配合物与DNA的作用．     

二维层状超分子配合物[ VO( acac)2(H2O)].(C9H11N3OS)的合成、晶体结构及性质

甲醇和水混合溶剂中,邻羟基苯乙酮缩氨基硫脲(L=C9H11N3OS)和乙酰丙酮氧钒VO(acac)2,在醋酸钠存在下反应,得到一种新颖的二维层状超分子配合物[ vO(acac)2(H2O)]·(C9H11 N3OS).通过红外光谱和X-射线单晶衍射对其进行结构表征.该晶体属三斜晶系,P1空间群,晶胞参数为:α=0.78...     

一维链状锌配合物的合成与结构表征

在乙醇溶剂中,在马尿酸和4,4＇-联吡啶2种配体共存的情况下,合成了一个未见文献报道的具有一维链状结构的锌（Ⅱ）配合物,用元素分析、红外光谱对其进行了表征。并用X-射线单晶衍射方法对其进行了晶体结构解析。结果表明,该化合物为单斜晶系,晶胞为Pc,晶胞参数：a=1.39761（14）nm,b=2.3998（2）nm,c=1.12395（12）nm,V=3.5007（6）nm3,Z=2,Mr=1552.18,Dc=1.473 g/cm3,T=298（2）K,F（000）=1620,μ（Mo Kα）=0.772cm-1,R=0.1734 andωR=0.0409,化合物分子通过分子间氢键和吡啶环的π-π堆积作用形成了一维链状结构。     

Preparation, crystal structure and quantum chemical investigation of [Li(NTO) (H_2O)_2]

[Li(NTO)(H2O)2] was prepared by mixing the aqueous solution of 3-nitro-1, 2, 4-triazol-5-one (NTO) and lithium hydroxide. The crystal structure of [Li(NTO)(H2O)2] was determined by single crystal diffraction analysis. The crystal is monoclinic, space group P21/n with crystal parameters of a = 0.742 0(2) nm, b = 0.344 9(1) nm, c = 2.490 6(3) nm, β = 94.89(1)° Z = 4, Dc= 1.799 g· cm-3, V = 0.635 nm3,μ = 1.591 cm-1, F(000) =392. The final R is 0.051. The MNDO MO calculation shows that the coordinate bonds of title compound possess certain extent of covalent character. O2 atom of NTO anion is bonded to Li atom; the nitro group will be lost first when NTO is decomposed.     

三苄基吗啉荒酸基锡的合成及晶体结构研究

以三苄基氯化锡和吗啉荒酸钠为原料,合成了三苄吗啉荒酸基锡.通过X-射线单晶衍射测定了它们的晶体结构.晶体结构为:三斜晶系,空间群P-1,a=0.984 17（16）nm,b=1.081 63（19）nm,c=1.378 8（2）nm,a=72.850（3）°,β=88.895（3）°,γ=64.231（3）°,Z=2,V=1.252 8（4）nm3,Dx=1.469 g/cm3,μ=1.204 mm-1,F（000）=564,R=0.032 8,wR=0.099 5（I≥2σ（I））,对配位中心锡原子而言,属于五配位的扭曲三角双锥结构.     

Rheological Phase Synthesis and Characterization of Copper Monosalicylate

A new structural copper (Ⅱ) monosalicylate, Cu(OC6 H4 CO2)·H2 O, was synthesized by the rheological phase reaction method from salicylic acid and copper oxide in 1:1 mole ratio. The structure was characterized by powder X-ray diffraction, IR and thermogravimetry. The Cu (OC6 H4 CO2)·H2O belongs to monoclinic system, with cell dimension: a = 2. 136 28(67), b=0.657 84(22), c=1.594 09(50) nm, β= 108.434(25) , V=2. 125 28(83) nm3 , Z=12, Dcalc = 2.041 kg·L-1 , Dobs = 2. 003 kg·L-1. The crystal water was lost at 96-250℃. The determined magnetic moment and magnetic susceptibility were 1. 947 B. M. and 6. 546×10-6 (287.20 K), respectively.     

Nd(Phen)2(NO3)3的合成及晶体结构

合成了一种新的稀土配合物Nd(Phen)2(NO3)3,化学式为C24H16N7NdO9,Mτ=690.68,晶体属于单斜晶系,Cc空间群,晶胞参数a=1.119 75(17)nm,b=1.807 3(3)nm,c=1.309 5(2)nm,β=100.584(3)°,V=2.605 1(7)nm3,Z=4,Dc=1.761 g/cm3,F(000)=1 364,μ=2.060 mm-1,λ(MoKa)=0.071 073 nm,R=0.018 7和wR=0.030 0,数据显示配位多面体为一个变形的反四方棱柱配合物,钕的配位数为十配位,4个氮原子和6个氧原子参与配位,4个Nd-N键长在0.258 4(4)nm到0.265 2 nm之间,6个Nd-O键长则在0.249 6(3)nm到0.260 3 nm之间.     

2-氨基-6-二茂铁基-4-(2,4-二氯苯基)吡啶-3-腈类化合物的微波合成和结构表征

标题化合物C24H20Cl2FeN2O2是由2,4-二氯苯甲醛、乙酰二茂铁、氰乙酸乙酯、醋酸铵在水相中微波辐射下反应制得。结构通过单晶X射线衍射法测定,其晶体属单斜晶系、空间群P21/n,a=0.749(3)nm,b=1.136(3)nm,c=2.577(3)nm,α=γ=90°,β=94.021(2)°,V=2.188(1)nm3,相对分子质量Mr=495.17,晶胞密度Dc=1.503g/cm3,Z=4,λ=0.071 073nm,吸收系数μ(Mo Kα)=0.958mm-1,F(000)=1 016,最终偏离因子R=0.079 7,wR=0.161 6。     

配合物［Cu(NPG)2(H2O)2］·CH3CH2OH的合成、晶体结构与磁性研究

用溶液法合成了配合物［Cu(NPG)₂(H₂O)₂］·CH₃CH₂OH (HNPG=邻苯二甲酰甘氨酸),对其进行了元素分析,红外光谱,热重分析,磁性和X射线单晶衍射实验.单晶结构分析表明该晶体属于三斜晶系,P-1空间群,晶胞系数a=0.476 74(12) nm,b=0.113 19(3)nm,c=0.11 614(3)nm,α=106.468(4)°,β =100.114(5)°,γ=94.358(5)°,V=0.586 4(3) nm³,Z=1.Cu(II)通过O-C-O构成一维链状结构,分子间氢键将一维链连接为平面结构,氢键对分子结构稳定起到重要作用;配合物存在弱的反铁磁性.