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1.
微波辐射固相法合成缩二脲铜配合物   总被引:5,自引:0,他引:5  
The copper(Ⅱ) complexes of biuret have been synthesized by solid phase reaction with microwave irradiation. The compositions and structures of the complexes are characterized by elemental analysis, molar conductance, in-frared spectra, electronic spectra, magnetic susceptibility, thermogravimetric and differential thermal analysis, X-ray powder diffraction. The two complexes have the compositions of [Cu(bi)2]Cl2(A) and [Cu(bi)2](NO3)2(B)(bi=NH2CONHCONH2) and the molecular formulae of CuC4H10O4N6Cl2 and CuC4H10O10N8, respectively. The molar conductance data show that the complexes are 1∶2 electrolyte. Infrared spectra of the complexes show oxygen atoms have been coordinated with divalent copper ion. The thermal decomposition processes of the complexes show that the final residues are all cupper oxide. The results of indexes to the X-ray powder diffraction data indicate that the crystal structure of the complexes belong to monoclinic system, the lattice parameters are: a=0.6976nm,b=1.1546 nm,c=2.1689nm,β=96.80°,V=1.7346nm3 for A; and a=0.7096nm,b=1.1359 nm,c=2.1002 nm,β=97.05°,V=1.6800nm3 for B, respectively.  相似文献   

2.
硒是人体内唯一受基因调控的必需微量元素。硒杂环化合物是有机硒化合物中的一个大家族,它在新型功能材料、高效的分析试剂和新型药物等方面均具有巨大开发潜力[1-3]。Cu也是人体内必须的微量元素之一,且Cu属亲硫亲硒元素,在生物体内的代谢过程中Cu与S、Se将产生一系列复杂的相  相似文献   

3.
本文报道室温固-固相化学反应一步法合成氨基酸铜配合物.trans-Cu(Gly)_2·H_2O、cis-Cu(Gly)_2·H_2O、trans-Cu(DL-Ala)_2、trans-Cu(DL-Ala)_2·H_2O、trans-Cu(DL-Val)和trans-Cu(DL-Leu)_2,经元素分析、IR、XRD、DTA测定,确定了配合物的组成及几何构型.并初步讨论了室温固相反应合成机理.  相似文献   

4.
采用室温固相反应法合成了甘氨酸锑和苯丙氨酸锑双核配合物 ,用元素分析、远红外光谱、热重差热分析及X射线粉末衍射进行了表征 .两种配合物Sb2 L5X·2 5H2 O(L =gly ,phe;X =Cl或I)的晶体结构均属于单斜晶系 ,甘氨酸锑配合物的晶胞参数为 :a =0 6 5 2 6nm ,b =1.2 2 2 7nm ,c=1.3877nm ,β=97.88°,V =1.0 96 8nm3 ,苯丙氨酸锑配合物的晶胞参数为 :a =1.0 6 17nm ,b =0 .7839nm ,c =1.5 72 5nm ,β =92 .32°,V =1.30 77nm3 .远红外光谱表明O ,N ,Cl或I原子参与配位  相似文献   

5.
我们在无水乙醇中,合成了除钜以外的十四种镧系元素硝酸盐与缩二脲的固体配合物。并用元素分析、DTA—TG、X—射线粉末衍射、红外光谱以及电导等手段研究了这些配合物的组成和性质。基于元素分析结果,红外光谱中M—O键、配位NO_3~-及游离NO_3~-的伸缩振动的存在,以及摩尔电导值,可建议它们的化学式分别为: [LnB_3(NO_3)_2]·NO_3 (Ln=La—Sm,B—缩二脲) [LnB_4(NO_3)_2)·NO_3 (Ln=Eu—Lu)  相似文献   

6.
7.
固相配位化学反应研究(LⅪ)   总被引:1,自引:0,他引:1  
  相似文献   

8.
多金属氧酸盐是一类纳米级金属-氧多核配合物,可通过变换抗衡阳离子、杂原子、配原子等方法从原子、分子水平上进行物理或化学修饰,与不同的有机分子结合后可以获得具有特定功能和性质的化合物.  相似文献   

9.
苯并咪唑双铜配合物合成表征和生物活性   总被引:1,自引:1,他引:1  
本文报道三种新的N-羟乙基-N,N′,N′-三苯并咪唑甲基乙二胺双配合物合成和表征。变温磁化率分析结果表明配合和双铜离子间存在弱的反铁相互作用。ESR结果示配合物中Cu-N键具部分共价性。对配合物儿茶酚酶活性,体外抗癌活性及农药活性测定结果表明配合物具一定催化活性和生物活性。  相似文献   

10.
镧与8—羟基喹啉配合物固相化学合成与表征   总被引:2,自引:0,他引:2  
  相似文献   

11.
All-Union Research Institute for Chemical Reagents and High-Purity Chemicals. Translated from Zhurnal Strukturnoi Khimii, Vol. 31, No. 5, pp. 140–143, September–October, 1990.  相似文献   

12.
13.
A new complex compound, bis(2,2,2-cryptand potassium) tetrakis(isocyanato)cuprate(II), 2[K(Crypt-222)]+ [Cu(NCS)4]2? was prepared and its crystal structure was studied by X-ray structural analysis. The structure includes one symmetrically independent complex cation [K(Crypt-222)]+ of a guest-host type and independent one half of [Cu(NCS)4]2? anion. Through the center of the anion passes crystallographic symmetry axis 2, the approximate point symmetry of the anion is D 2, while the approximate point symmetry of the complex cation is D 3. The coordination polyhedron of the [Cu(NCS)4]2? anion (four N atoms) conjugated with Cu2+ cation is a nonplanar square considerably screwed into a flattened tetrahedron. The K+ cation (coordination number 8) of the complex cation [K(Crypt-222)]+ is coordinated by all eight heteroatoms (6O + 2N) of the 2,2,2-cryptand ligand, and its coordination polyhedron can be described as bis-basecentered trigonal prism slightly screwed into an anti-prism.  相似文献   

14.
15.
Cobalt(II) bis(oxalato)cobaltate(II) tetrahydrate (Co[Co(C2O4)] · 4H2O) was synthesized and characterized on the basis of elemental and spectral analysis. The thermal decomposition of the complex was investigated in air and nitrogen media. In air, complete dehydration of the complex occured at 251°, followed by rapid decomposition to a mixture of CO2O3 and Co3O4 at 300°; in nitrogen, dehydration occurred at 206°, followed by decomposition to a mixture of Co and CoC2O4, and finally to Co + CoO, at 394° and 420°, respectively. The activation energies for the dehydration and decomposition reactions in nitrogen and air media were evaluated and a tentative reaction mechanism for the thermal decomposition of the complex was proposed.
Zusammenfassung Das Tetrahydrat von Kobalt(H)bisoxalatokobaltat(II) wurde dargestellt und mittels Elementar- und Spektralanalyse characterisiert. Die thermische Zersetzung der Komplexe wurde sowohl in Luft- als auch in Stickstoffatmosphäre untersucht. In Luft erfolgt bei 251 °C eine vollständige Dehydratierung, gefolgt von einer schnellen Zersetzung bei 300 °C in Co2O3 und Co3O4. In Stickstoff erfolgt die Dehydratierung bei 206 °C, gefolgt von einer Zersetzung bei zunächst 394 °C in Co und CoC2O4, anschliessend bei 420 °C in Co und CoO. Die Aktivierungsenergien für die Dehydratierung und Zersetzung in Stickstofo- und Luftatmosphäre wurden ermittelt und für die thermische Zersetzung der Komplexe ein Reaktionsmechanismus gegeben.

- -() ([(24)2]·42), - . 251 ° 23 34 300 °. 260 ° 24, , , 394 420 °. - , .


The authors thank the RSIC, CDRI, Lucknow for the C, H analyses and IR spectra: RSIC, IIT, Madras for the low-frequency IR spectra; RSIC, IIT, Bombay for the e.s.r. spectra; RSIC, Nagpur University for the TG and DTG measurements; and Dr. S. K. Datta of Forensic Science Laboratory, Gauhati, Assam for the DSC measurements.  相似文献   

16.
Imidazoliumm bis(oxalato)cuprate(II) has been synthesized and its structure determined by X-ray crystallography. Variable temperature magnetic susceptibility measurements, as well as EPR and UV-vis spectroscopic studies, have been carried out. The results show that in the solid state the compound exists in a chain-like structure, with an asymmetric one-atom weak oxalate bridge joining adjacent CuII centres. Of the two oxygen atoms of each coordinated oxalate only one participates in bridging; thus, each oxalate ultimately achieves three-point coordination. Each of the imidazolium ions participates in two hydrogen through the N—H moieties. The compound exhibits a weak antiferromagnetic interaction (J = −0.40 cm−1).EPR spectra reveal that the triplet state is appreciably populated at both room and liquid nitrogen temperatures.  相似文献   

17.
18.
The synthesis of a new charge-neutral, air- and moisture-stable fluorinated bis(phenoxyketimine) Pd(II) complex is presented. Its activity as a precatalyst in the Suzuki-Miyaura cross-coupling reaction of activated and unactivated bromides has been explored.  相似文献   

19.
20.
Potassium bis(malonato)borate C6H4BKO8 (I) was synthesized for the first time in an aqueous medium. Well-shaped single crystals were formed. Their X-ray diffraction structure (space group P \(\overline 1 \), a = 7.4073(2) Å, b = 7.9161(2) Å, c = 9.0755(2) Å, α 113.225(1)°, β = 91.553(1)°, γ = 104.760(2)°, Z = 2) was refined by the full-matrix least-squares method in the anisotropic (K, C, O, B) or isotropic (H) approximations to R1 = 0.394, wR2 = 0.1080, 2661 independent reflections (Bruker-Nonius KappaCCD, λMoK α radiation). The structure is formed by spirane-type complex anions and potassium cations. A complex anion consists of two malonic acid molecules coordinated in the bidentate mode to the same four-coordinate boron atom. The K+ coordination geometry is an irregular nine-vertex polyhedron formed by the oxygen atoms of seven complex anions. The structure of compound I is layered.  相似文献   

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