三元混配配合物[Ni(PMBP-sal)(py)]的合成、表征与晶体结构

合成了混配配合物[Ni(PMBP-sal)(py)]，(PMBP：1-苯基-3-甲基-4-苯亚甲基吡唑啉酮-5，sal：水杨酰肼，py：吡啶)，并用元素分析，IR光谱，紫外可见吸收光谱，循环伏安和单晶X-射线衍射进行表征。结构分析表明N-(1-苯基-3-甲基-4-苯亚甲基吡唑啉酮-5)-水杨酰肼和吡啶与Ni(Ⅱ)配位形成略微畸变的平面正方形化合物。     

Synthesis and structure analysis of diammonium 3,5-dinitro-1,2,4-cyclopentanetrione

A new energetic ionic compound, diammonium 3,5-dinitro-1,2,4-cyclopentanetrione (DDCP), has been synthesized. It has been characterized by elemental analysis, IR, and single-crystal X-ray diffraction. The compound crystallizes in triclinic system, space group P1, a=4.485(1) ?, b=7.527(1) ?, c=13.367(1) ?, α=94.15(1)°, β=92.73(1)°, γ=101.75(1)°, V=439.72(11) ?³, Z=2, and D _calc=1.784 Mg m⁻³; R=0.0331, R _w=0.0892 for 1643 reflections with I>2σ(I). The entities of two ammonium cations and 3,5-dinitro-1,2,4-cyclopentanetrione anions are held by electrostatic forces and intermolecular hydrogen bonds. The bivalent anion exists as all kinds of resonance structures, which is in favor of stability of the anion. The thermal decomposition of title compound is studied by using DSC and TG-DTG techniques. The results show that the title compound has a higher enthalpy change and can evolve abundant gas products.     

［Cd(CHZ)3］(ClO4)2的制备和分子结构研究

本文报道了高氯酸三碳酰肼合镉(Ⅱ)的制备方法和分子结构。该配合物结构式为［Cd(CHZ)₃］(ClO₄)₂。晶体属单斜晶系,P2₁/n空间群。晶体学参数为：a=1.0281(1) nm, b=0.8617(1) nm, c=2.1360(1) nm,β=100.53°, V=1.8604(3) nm³; Z=4, Dc=2.076 g·cm^-3, μ(Mo, K_α)=15.43 cm^-1。经全矩最小二乘法对非氢原子坐标和温度因子进行修正。最终偏离因子R=0.0296。在该配合物中,碳酰肼(CHZ)分子作为双齿配体,由羰基氧原子和1位氮原子与Cd配位,形成五员平面螯合环,配合物分子中共有三个这样的螯合环,中心离子为六配位八面体构型;配合物的外界是两个高氯酸根离子,通过库仑力与内界结合在一起。     

新型一维麻花状超分子配合物的合成与结构

具有特殊结构及性能的超分子化合物由于其结构上的新颖性及潜在的应用价值而成为人们关注的热点 .以一个苯环为间隔基两端含两个吡啶基团的配体 L1与 Pd( ) ,Pt( )形成 2 -索烃 [1 ] ,与Cd( NO3) 2 则形成具有一维平面结构的聚合物 [2 ] .以联苯为间隔基的配体 L2在 4 ,4′-二联吡啶共同作用下与 Pd( )形成 2 -索烃 [3] .同样以一个苯环为间隔基两端含两个咪唑基团的配体 L3与 Zn( NO3) 2 ,Ag NO3反应得到新型多聚轮烷配合物 [4,5 ] .研究结果表明 ,配体或配位金属离子等的微小差别即导致形成结构不同的超分子化合物 .但这些超分子…     

[Ni(CHZ)3](TNR).5H2O的制备、晶体结构和热分解机理

用2,4,6-三硝基间苯二酚(斯蒂芬酸, TNR)镍的水溶液和碳酰肼(CHZ, NH2NHCONHNH2)水溶液反应, 制备出配合物[Ni(CHZ)3](TNR).5H2O, 测定了其晶体结构, 并用 TG-DTG, DSC 和 IR技术研究了其热分解机理. 该晶体属三斜晶系, P空间群, 晶胞参数a＝1.045 40(10) nm, b＝1.167 1(2) nm, c＝1.227 8(2) nm, α＝109.190(10)°, β＝121.168(12)°, γ＝99.700(10)°, V＝1.261 3(3) nm3, Z＝2, Dc＝1.744 g/cm3, μ(Mo,Kα)＝0.873 mm-1, F(000)＝688, R＝0.041 9, Rw＝0.105 3. 在该配合物分子中, 碳酰肼为双齿配体, 由羰基O原子和1位N原子与Ni2+离子配位, 分子中共形成3个五元平面螯合环, 中心离子为六配位八面体结构. 该配合物在程序升温条件下, 分两步脱去所含结晶水, 第一步失去4个结晶水, 第二步失去1个结晶水, 在500 ℃时的最终分解产物为Ni2O3.     

Synthesis,structure and properties of an imidazolate bridged copper,zinc binuclear complex

A new imidazolate bridged Cu~(2+),Zn~(2+)binuclear complex[(dtma) CulmZn (dtma)]ClO_4·2.5H_2O taken as active site model for Cu,Zn-SOD has been synthesized and its crystal structuredetermined.All the bond lengths, bond angles and the distance between Cu and Zn atoms in Cu-Im-Zn core of the model complex are close to those in Cu,Zn-SOD.ESR parameters of the modelcomplex as a function of pH show that the imidazolate bridge is stable in pH range 10—12,and isbroken on Zn side at pH～9.With decreasing pH,the imidazole is released at pH～4 and the dtmaligand dissociates from the Cu containing fragment at pH～2.4.     

Synthesis and characterization of nitro-p-xylenes

In this paper we elected to nitrate p-xylene because this compound has only one mononitro- and trinitro- isomer. Trinitro-p-xylene was used as a starting material for the synthesis of other compounds in subsequent work. The mononitration of p-xylene can be easily carried out at 30 degrees C. Nitro-p-xylene is easily nitrated to dinitro-p-xylene at a temperature of 80 degrees C. The trinitro-p-xylene can be obtained at 120 degrees C. Single crystals of 2,3-dinitro-p-xylene and 2,3,5-trinitro-p-xylene were grown using the slow cooling method and we report the X-ray structure of the former. The thermal decomposition of the compounds was studied using differential scanning calorimetry (DSC) and thermogravimetry-derivative thermogravimetry (TG-DTG) techniques and FT-IR. The target compounds were also characterized by (1)H-NMR, (13)C-NMR and MS.     

Taibaihenryiin C的构型、构象及晶体结构

从太白山产的鄂西香茶菜中分离得到新骨架的二萜类化合物TaibaihenryiinC,对其进行X射线衍射晶体结构分析,确定其分子中各取代基的相对构型、环构象及晶体结构.研究表明,C-3位的羟基和C-11位的乙酰氧基以C-20位的甲基为参考均位于β位;分子中的A环为椅式构象,B,C环接近于船式构象,D环接近于信封式构象.特别是在D环中存在较大的扭转角,使D环中有内应力存在,这表明该化合物具有潜在的生理活性.TaibaihenryiinC的晶体结构属正交晶系,P2₁2₁2₁空间群,晶胞参数a=0.6162(1)nm,b=1.2730(1)nm,c=2.5193(3)nm,Z=4.在晶体中分子间通过C-3位的-OH氢与C-11位的乙酰氧基上的羰基氧形成分子间氢键,使分子在晶体中沿a轴呈螺旋结构排列.     

Crystal and molecular structure of main adduct of benzaldoxime dehydrodimer and styrene

Three 1:1 adducts have been obtained by heating benzaldoxime dehydrodimer with styrene. The main product possesses the structure of bis-nitrone type. A radical addition mechanism is proposed.     

含能配合物[Mn(DAT)6](ClO4)2的合成、晶体结构、热行为及感度性质

合成了新型含能配合物[Mn(DAT)6](ClO4)2(DAT=1,5-二氨基四唑), 用X射线单晶衍射法测定了其晶体结构. 该晶体属三方晶系, P3c1空间群, a=b=1.18435(17) nm, c=1.3081(3) nm, α=β=90°, γ=120°, V=1.5891(5) nm3, Z=2. 该配合物分子结构单元中有1个Mn2+离子、6个DAT分子和2个ClO4-离子. 由6个DAT分子中的6个N原子与中心Mn2+离子配位形成六配位、非中心对称的畸变八面体结构. 利用元素分析、差示扫描量热分析(DSC)、热重-微分热重分析(TG-DTG)等方法进行了表征, 研究了其感度性能. 研究结果表明, 该配合物对外界刺激具有很高的响应性和危险性.