5-烃基-2,3-二甲基吡嗪N-单氧化物的合成

一烃基或二烃基吡嗪的N-单氧化物可以进行氯化、乙酰氧基化等反应,它是重要的有机合成中间体.据报道二烃基吡嗪与30％过氧化氢在醋酸中进行N-氧化反应,当二烃基吡嗪:30％过氧化氢:醋酸的摩尔比为1:2:5、反应温度70～80℃、反应时间8h时,产物是N-单氧化物;当摩尔比为1:4:10、反应温度95℃、反应时间8～24h时,产物是N-二氧     

5,6-二甲基-2,3-吡嗪二甲酰胺-铜配合物的合成及其抗菌活性

以2,3-二甲基-5,6-二氰基吡嗪为原料,稀碱条件下不完全氧化得到配体5,6-二甲基-2,3-吡嗪二甲酰胺,再与醋酸铜在弱碱条件下合成5,6-二甲基-2,3-吡嗪二甲酰胺-铜配合物;采用牛津杯法预试验及试管二倍稀释法研究配体5,6-二甲基-2,3-吡嗪二甲酰胺及其配合物的抗菌活性。 对合成的配合物通过紫外光谱、红外光谱、差热-热重分析进行确证表征。 该配合物表现出较好的抑菌和杀菌作用,对大肠埃希菌的MIC和MBC均为50 mg/L,对金黄色葡萄球菌的MIC和MBC均为25 mg/L,而配体没有明显的抑菌杀菌作用,从而为临床疾病的治疗和食品添加剂的研发提供参考。     

2-吡嗪羧酸铜配合物的合成及其结构表征

Solvothermal reaction of 2-pyrazinic acid with Cu(SO₄)₂·5H₂O yields the title complex {[Cu₂(Pyz)₂(H₂O)₄]·SO₄}_n(1), which was characterized by elemental analysis, IR and single crystal X-ray diffraction structural analysis. The complex 1 crystallizes in Monoclinic system, space group P2₁/c, with lattice parameters a=1.126 87(6) nm, b=0.073 511(4) nm, c=1.185 06(7) nm, β=95.070(2)°, and V=0.977 83(9) nm³, Z=4, D_c=2.172 Mg·m^-3. CCDC: 692347.     

含2,3-吡嗪二羧酸的镉配位聚合物的合成、晶体结构和荧光性质

在水溶液中合成了含2,3-吡嗪二羧酸配体的3个镉配位聚合物,{[Cd(pzdc)(2,2′-bpy)]·H₂O}_n(1),{[Cd(pzdc)(2,2′-bpy)]2H₂O}_n (2)和{[Cd(pzdc)(H₂O)₂]·2H₂O}_n (3)。配合物1属单斜晶系,P2₁/c空间群;配合物2为单斜晶系,P2₁/n空间群;配合物3为单斜晶系,P2₁/c空间群。每个pzdc配体通过4个配位原子与3个金属Cd配位,在配合物1和2中形成了具有(4,8²)网格状的二维平面构型,而在配合物3中得到了一维链状和氢键3D网络结构。尽管配合物1和2的分子只是结晶水分子数目存在差异,且具有相同的(4,8²)网格状二维平面构型,但是他们的分子结构趋向存在很大差别。配合物1和3的荧光光谱均在415 nm处出现较强的发射峰。     

一价铜配位聚合物[Cu(2-mpac)]n的合成与结构

近年来,配位聚合物由于在光学,电学,磁学,催化,分离.吸附等方面具有潜在的功能性,已成为当前最具挑战力的热点研究领域之一 [1～9].因此,进一步合成具有特定结构和功能的配合物具有非常重要的意义和价值.2-甲基吡嗪-5-羧酸(2-mpac)是一类非常好的有机配体,由于结合了吡嗪和羧基二者的配位特点,从而呈现丰富的配位模式,所以常常用来合成具有不同结构和性质的配合物 [10～15].     

铜配位聚合物[Cu(C5H6S5)(SCN)]∞的合成和结构研究(英)

The Copper(Ⅰ) supramolecular complexes of 4,5-bis(methylthio)-1,3-dithiole-2-thione (C₅H₆S₅), [Cu(C₅H₆S₅)(SCN)]_∞ 1 and [Cu(C₅H₆S₅)I]_∞ 2, have been prepared and characterized. X-ray structure analysis for complex 1 reveals that the infinite chain structure with polymeric stairs of different lengths is formed through the coordination mode (μ₃) of the thiocyanate bridges. The shorter interchain S…S contacts give rise to a three-dimensional network structure. CCDC: 215668.     

两个含5-甲基吡嗪-2-羧酸主族配合物的合成和晶体结构

本文以5-甲基吡嗪-2-羧酸(Hmpca)同Pb(NO₃)₂和Sr(NO₃)₂水热反应得到了2个配合物{[Pb₂(mpca)₄]·H₂O}_n (1)和{[Sr₂(mpca)₄(H₂O)₂]·H₂O}_n (2),并用元素分析,FTIR和X-射线单晶结构分析进行了表征。X-射线单晶结构分析表明配合物1和2均属于单斜晶系,空间群分别是P2₁/n和P2₁。在配合物1中,Pb(Ⅱ)的配位环境为扭曲的四方锥构型;在配合物2中,每个Sr(Ⅱ)与5个羧基氧,1个水分子和2个氮原子配位形成八配位的多面体构型,配合物1和2均是一维链状结构的化合物。在配合物1中游离的水分子与羧基氧之间的氢键作用将相邻的2条链连接成双链结构。配合物2中配位水和游离水分子与未配位的羧基氧以及配体中的氮原子之间的氢键作用将链连接成二维平面结构。     

锰的两种配位聚合物的合成和晶体结构

用水热法合成2个新的三维配位聚合物：[Mn₂(Pyzca)₂Cl₂]_n (1)和[Mn₂(Pyzca)₂Br₂]_n (PyzcaH=2-Pyrazinecarboxylic acid) (2)，并对这2个聚合物进行了元素分析、红外光谱、X-射线单晶等表征。配合物1和2的晶体都属于三斜晶系，P1空间群。配合物1和2分别通过环和分子间氢键连接无限延伸形成三维网格状结构。     

2,3-吡啶二羧酸铜(Ⅰ)配合物的合成与结构

铜配合物具有多变的配位结构,可活化小分子,可用于氧转移、氧化加成、新陈代谢、均相催化等许多领域。还可以用作金属酶的化学模拟和配合物结构及反应性能研究方面[1-3]。本文以2,3 二羧酸 吡啶为辅助配体及[(PPh3)2Cu(BH4)]作为起始原料,室温下,通过取代反应合成了单核铜(Ⅰ)配合物[(PPh3)2Cu(C7H4NO4)],经元素分析、电导、光电子能谱、红外光谱及单晶XRD方法对配合物进行了表征。1　实验部分1 1　仪器和试剂意大利ERBA 1106元素分析仪,JA96 970等离子光谱仪,Nicolet170SX分析仪(CsI压片),AV 300Bruker分析仪(CDCl3溶剂,8…     

新型2,4-二氨基-6-(2’-吡嗪)-均三嗪铜配合物的合成及其热稳定性

以2,4-二氨基-6-(2’-吡嗪)-均三嗪(PZTA)为配体,与CuCl2[n(PZTA)∶n(CuCl2)=1∶1]反应合成了一种新的铜配合物{[Cu(PZTA)2Cl]Cl(1)},其结构经IR,元素分析和X-射线单晶衍射表征。1属单斜晶系,空间群C2/c,晶胞参数a=11.600(2),b=12.700(3),c=14.600(3),β=102.80(3)°,V=2 097.423,Z=4,Dc=1.624 g·cm-3,μ=1.331 mm-1,F(000)=1 036.0,S=1.106,Rint=0.036,R1=0.034 2,wR2=0.088 6。1由一个Cu(Ⅱ),两个PZTA,一个配位Cl和一个游离Cl-构成。1通过弱相互作用和氢键作用堆积成二维层状结构和三维堆积结构。1的初始分解温度为300℃。     

Synthesis,Structure and Optical Properties of Cupro-8-thioquinoline Coordination Polymer,[Cu^I(C9H6NS)]n

ＩｎｔｒｏｄｕｃｔｉｏｎＡｖａｒｉｅｔｙｏｆｆｕｎｃｔｉｏｎａｌｃｏｏｒｄｉｎａｔｉｏｎｐｏｌｙｍｅｒｓｗｅｒｅｓｙｎ ｔｈｅｓｉｚｅｄｉｎｒｅｃｅｎｔｙｅａｒｓｆｏｒｔｈｅｉｒｄｉｖｅｒｓｉｆｉｅｄｓｔｒｕｃｔｕｒｅｓ1ａｎｄｃｏｎｓｉｄｅｒａｂｌｅａｐｐｌｉｃａｔｉｏｎｓｉｎｔｈｅｆｉｅｌｄｓｓｕｃｈａｓｃａｔａｌｙｓｉｓ ,2 ｎｏｎ ｌｉｎｅａｒｏｐｔｉｃｓ,3 ｍｏｌｅｃｕｌａｒｍａｇｎｅｔｉｃｍａｔｅｒｉａｓ4 ａｎｄｅｌｅｃｔｒｉｃｃｏｎ ｄｕｃｔｏｒｓ .5Ｆｒａｍｅｗｏｒｋｓｏｆｃｏｏｒｄｉｎ…     

N-乙酰皮考林酰肼合铜的合成和晶体结构

N-乙酰皮考林酰肼(HL)与一水乙酸铜在甲醇溶剂中形成配合物Cu(Ⅱ)L2·0 5H2O(C16H17CuN6O4 5,Mr=428 90),晶体属单斜晶系,空间群为C2/c,a=2 8355(2)nm,b=0.90009(4)nm,c=1.49351(9)nm,β=107.974(2)°,V=3 6258(3)nm3,Z=8,F(000)=1760,μ(MoKα)=1 24mm-1,R=0 0338,wR=0 0955.Cu(Ⅱ)原子的配位介于六配位的严重扭曲的八面体和四配位的不规则多面体之间,其中Cu与O(羰基)距离为0 2653(2)和0 2591(7)nm.量子化学从头算方法计算结果表明,铜与羰基氧之间存在弱配键,晶体通过分子间氢键作用形成一维的无限链状结构     

A coordination polymer consisting of two different one‐dimensional copper(II) chains

The title compound, catena‐poly[[[diaqua(methanol‐κO)copper(II)]‐μ‐N‐(4‐methylpyrimidin‐2‐yl‐κN¹)pyrazin‐2‐amine‐κ²N¹:N⁴] [[aqua(aqua/methanol‐κO)(perchlorato‐κO)copper(II)]‐μ‐N‐(4‐methylpyrimidin‐2‐yl‐κN¹)pyrazin‐2‐amine‐κ²N¹:N⁴] tris(perchlorate) methanol monosolvate 1.419‐hydrate], {[Cu(C₉H₉N₅)(CH₃OH)(H₂O)₂][Cu(C₉H₉N₅)(ClO₄)(CH₃OH)_0.581(H₂O)_1.419](ClO₄)₃·CH₃OH·1.419H₂O}_n, is a one‐dimensional straight‐chain polymer of N‐(4‐methylpyrimidin‐2‐yl)pyrazin‐2‐amine (L) with Cu(ClO₄)₂. The complex consists of two crystallographically independent one‐dimensional chains in which the Cu^II atoms exhibit two different octahedral coordination geometries. The L ligand coordinates to two Cu^II centres in a tridentate manner, with the pyrazine ring acting as a bridge linking the Cu^II coordination units and building an infinite one‐dimensional chain. Extensive hydrogen bonding among perchlorate anions, water molecules and L ligands results in three‐dimensional networks.     

Synthesis and Crystal Structure of a 1-D Coordination Polymer {[Cu(NIT4py)_2(ip)]·6H_2O}_n

1 INTRODUCTION Pyridyl-substituted nitroxide radicals have at- tracted considerable attention in recent years due to the ability to coordinate with metal ions and act as magnetic couplers, giving rise to new functional ma- terials with particular magnetic and optical prope- rties as well as a variety of structural topologies[1~3]. Considerable efforts have been made in designing and preparing multi-dimensional materials with app- ropriate bridges, such as pseudohalide, dicyanide, dicyanoa…     

一维链状配位聚合物[M(H2bpb)(H2O)4](SO4)2·6H2O[M=Zn(Ⅱ)，Cu(Ⅱ)]的合成及晶体结构表征

设计并合成了一个含吡啶基团的柔性配体：N，N′-Bis(3-pyridylmethyl)-1，4-benzenedimethylamine(bpb)。通过bpb与硫酸锌及硫酸铜反应得到了两个新型具有一维链状结构的配位聚合物：[M(H₂bpb)(H₂O)₄](SO₄)₂·6H₂O[M=Zn(Ⅱ) 1，Cu(Ⅱ) 2]。X-射线晶体结构测定表明，这两个     

Hydrothermal Synthesis and Crystal Structure of a Cadmium(II) Polymer with One-dimensional Chain Structure: [Cd(bpy)(BDC)]_n·nbpy

A metal-organic coordination polymer [Cd(bpy)(BDC)]n·nbpy (bpy = 2,2-bipyri- dine, H2BDC = terephthalic acid) has been hydrothermally synthesized and structurally characteri- zed by elemental analysis, IR spectrum, TG and single-crystal X-ray diffraction. The complex crystallizes in monoclinic, space group C2/c with a = 15.723(5), b = 21.695(5), c = 7.576(5) , β = 116.171(7)o, V = 2319.3(18) 3, C28H20CdN4O4, Mr = 588.88, Dc = 1.686 g/cm3, μ(MoKα) = 0.987 mm-1, F(000) = 1184, Z = 4, the final R = 0.0464 and wR = 0.0831 for 1882 observed reflections (I > 2σ(I)). It exhibits a three-dimensional network with channels constructed from one-dimensional coordination chains via C–H···O hydrogen bonds and significant aromatic π-π stacking interactions.     

Synthesis,Crystal Structure and Electrochemical Properties of a One-dimensional Chain Coordination Polymer [Cu（phen）（2,4,6-TMBA）2（H2O）]n

A one-dimensional chain coordination polymer [Cu（phen）（2,4,6-TMBA）2（H2O）]n has been synthesized by reacting 2,4,6-trimethyl-benzoic acid, 1,10-phenanthroline and Cu（Ⅱ） perchlorate and its structure was characterized. Crystal data for this complex： tetragonal, space group I41, a = 2.0293（3）, b = 2.0293（3）, c = 1.3758（2） nm, α =β= γ = 90°, V= 5.6657（13） nm3, Dc= 1.379 g/cm3, Z = 8, μ（MoKa） = 0.815 mm-1, Mr = 588.14, F（000） = 2456, S = 1.047, R = 0.0459 and wR = 0.1053. The crystal structure shows that two neighboring Cu（Ⅱ） ions are linked together by one bridging-chelating 2,4,6-trimethyl-benzoic group, forming a one-dimensional chain structure. Each Cu（Ⅱ） ion is coordinated with two nitrogen atoms from one 1,10-phenanthroline molecule, three oxygen atoms from three 2,4,6-trimethyl-benzoic acid molecules and one oxygen atom from one water molecule, giving a six-coordinate distorted octahedral coordination geometry. The cyclic voltammetry behavior of the complex was also investigated.     

Synthesis, characterization, properties and crystal structure of heterometallic 1D coordination polymers{[CuLZn· CuLZn(H2O)]·H2O}n

Copper-zinc heterometallic 1D chain coordination polymer has been synthesized and characterized by elemental analysis, and IR spectra etc. The crystal structure was determined by single-crystal X-ray diffraction analyses. The title complex is 1 D chain coordination polymer with the chemical formula {[CuLZn·CuLZn(H2O)]·H2O}n, where H4L=N-(2-hydroxybenzamido)-N'-(3-carboxy-Isalicylidene)ethylenediamine. Its structural unit is comprosed of two tetranuclear cycles formed by two dissymmetrical tetranuclear units. These units polymerized each other to form 1D chain coordination polymer.