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1.
Gao En-Qing Yang Guang-Ming Liao Dai-Zheng Jiang Zong-Hui Yan Shi-Ping Wang Geng-Lin Kou Hui-Zhong 《Transition Metal Chemistry》1999,24(2):244-246
Four new complexes of [14]N4 macrocyclic oxamides, namely [CuL1], [CuL2], [(CuL1)3Mn](ClO4)3 and [(CuL2)3 Mn](ClO4)3 [L1 and L2 are the dianions of 2,3-dioxo-5,6: 3,14-dibenzo-7,12-bis(ethoxycarbonyl)-1,4,8,11-tetraazacyclotetradeca-7,11-diene (H2L1) and 2,3-dioxo-5,6:13,14-dibenzo-9-methyl-7,12-bis(ethoxycarbonyl)-1,4,8,11-tetraazacyclo-tetradeca-7,11-diene (H2L2), respectively], have been prepared and characterized. The observed magnetic susceptibilities of the [(CuL1)3Mn] (ClO4)3 complex over the ca. 2–300 K range have been fitted to theoretical equations based on the Heisenberg spin Hamiltonian =–2JMn(Cu1+ Cu2+Cu3) and molecular field approximation. The results indicated that both the intramolecular and intermolecular magnetic interactions are antiferromagnetic with JCuMn= –19.8cm–1 and zJ=–1.41cm–1. 相似文献
2.
En-Qing Gao Guang-Ming Yang Jin-Kui Tang Dai-Zheng Liao Zong-Hui Jiang Shi-Ping Yan 《Polyhedron》1999,18(27):648-3646
Four novel tetranuclear macrocyclic complexes of the formula [(CuLi)3Fe](ClO4)3·3H2O (i=1–4, Li are the dianions of the [14]N4 and [15]N4 macrocyclic oxamides, namely 2,3-dioxo-5,6:13,14-dibenzo-7,12-bis(ethoxycarbonyl)-1,4,8,11-tetraazacyclotetradeca-7,11-diene, 2,3-dioxo-5,6:13,14-dibenzo-9-methyl-7,12-bis(ethoxycarbonyl)-1,4,8,11-tetraazacyclotetradeca-7,11-diene and 2,3-dioxo-5,6:14,15-dibenzo-7,13-bis(ethoxycarbonyl)-1,4,8,12-tetraazacyclotetradeca-7,12-diene] have been prepared and characterized. These complexes are the first examples of oxamido-bridged Cu(II)–Fe(III) heterometallic species. Cryomagnetic studies on [(CuL1)3Fe](ClO4)3·3H2O (1) and [(CuL3)3Fe](ClO4)3·3H2O (3) (77–300 K) revealed that the Cu(II) and Fe(III) ions interact antiferromagnetically through the oxamido bridge, with the exchange integral J=−30.8 cm−1 for 1 and J=−28.7 cm−1 for 3 based on
. The interaction parameters have been compared with that of the related [Cu3Mn] compound. 相似文献
3.
《Journal of Coordination Chemistry》2012,65(14):1169-1176
A new oxamido-bridged trinuclear copper(II) complex [(CuL)2Cu](ClO4)2·0.5H2O (L?=?the dianion of 2,3-dioxo-5,6,14,15-dibenzo-7,13-bis(ethoxycarbonyl)-1,4,8,12-tetraazacyclotetradeca-7,12-diene) has been synthesized by self-assembly and characterized. X-ray diffraction analysis reveals that the title complex is monoclinic, space group P21, with a?=?16.213(5), b?=?9.811(3), c?=?18.802(6)?Å, β?=?96.790(5)°. The central copper(II) ion lies in a distorted octahedral environment. Terminal coppers have square pyramidal coordination geometry. Magnetic measurements show there is strong antiferromagnetic interaction between the central and the terminal Cu(II) ions. 相似文献
4.
Yuan-Fang Wang Rong-Fang Li Qing-Lun Wang Li-Hua Yu Guang-ming Yang Dai-Zheng Liao 《Transition Metal Chemistry》2004,29(7):728-731
Two compounds, [Co(bpy)2(NiL)](ClO4)2
(1)and {[Co(phen)3](NiL)}(ClO4)2
(2), have been synthesized: (H2L=2,3-dioxo-5,6,14,15-dibenzo-1,4,8,12-tetraazacylotetradeca-7,12-diene, bpy=2,2-bypyridine and phen = 1,10-phenanthroline). Compound (1) contains a discrete binuclear [Co(bpy)2(NiL)]2+ cation, while compound (2) is composed of [Co(phen)3]2+ cations and NiL neutral fragments. The magnetic properties of compound (1) have been dealt with by isotropic one-ion approximation of the CoII ion with a spin--orbit coupling in an Oh symmetry environment. The electronic spectra of these two compounds have also been discussed. 相似文献
5.
6.
7.
Jingmin Shi Peng Cheng Mingming Miao Yongjiang Liu Daizheng Liao Zonghui Jiang Genglin Wang 《Transition Metal Chemistry》1996,21(6):512-514
Summary Three new CuII trinuclear complexes, namely [Cu3(BZT)(phen)3(ClO4)3]·6H2O (1), [Cu3(BZT)(Nphen)3 (ClO4)3]·6H2O (2) and [Cu3(BZT)(bipy)3 (ClO4)3]·3H2O (3) (BZT) = 1,3,5-benzenetricarboxylato, phen = 1,10-phenanthroline, Nphen = 5-nitro-1,10-phenanthroline, bipy = 2,2-bipyridyl, have been synthesized, with 1,3,5-benzenetricarboxylato as the bridged ligand, and characterized by elemental analysis, and i.r. and electronic reflection spectra. We propose that the complexes have an extended 1,3,5-benzenetricarboxylatobridged structure containing three CuII atoms. The variable-temperature magnetic susceptibilities of the complexes were measured in the 77–300 K range. The magnetic coupling parameters are consistent with an antiferromagnetic exchange model based on the Hamiltonian operator [=–2J(
1
2+
1
3+
2
3, where S
1=S
2=S
3=1/2, giving the antiferromagnetic coupling parameters of 2J = – 18.6 cm-1 for (1)–(3). 相似文献
8.
Three novel -oxalato-bridged Cu
3
II
CrIII-type heterotetranuclear complexes described by the overall formula [Cu3Cr(ox)3L3](ClO4)3, where ox represents the oxalato dianions, L stands for diaminoethane (en), 1,3-diaminopropane (pn), and 1,2-diaminopropane (ap) respectively, have been synthesized and characterized by elemental analyses, molar conductivity and magnetic moment (room-temperature) measurements, i.r., e.s.r. and electronic spectral studies. It is proposed that these complexes have oxalato-bridged structures consisting of three copper(II) ions and a chromium(III) ion, in which the chromium(III) ion has an octahedral environment and the three copper(II) ions have square-planar environments. Variable temperature magnetic susceptibility (4.2–300 K) measurements and studies of complexes [Cu3Cr(ox)3(en)3](ClO4)3
(1) and [Cu3Cr(ox)3(pn)3](ClO4)3
(2) revealed the occurrence of an intramolecular ferromagnetic interaction between the copper(II) and chromium(III) ions through the oxalato-bridge within each molecule. The magnetic data have been used also to deduce the indicated -oxalato-bridges [Cu
3
II
CrIII] heterotetranuclear structure. On the basis of the spin Hamiltonian operator,
, the magnetic analyses were carried out for the two CuII—CrIII heterotetranuclear complexes and the spin-coupling constants (J) were evaluated as +6.36 cm–1 for (1) and +7.02 cm–1 for (2). The results indicate that the bridging oxalato entity should be able to transmit ferromagnetic interactions in the strict orthogonality [Cu
3
II
CrIII] system. 相似文献
9.
Xian-Ru Sun Ming-Ming Miao Peng Cheng Dai-Zheng Liao Zong-Hui Jiang Gen-Lin Wang 《Transition Metal Chemistry》1996,21(3):270-272
Summary Two novel MnII-MnIII-MnII oxalato complexes have been synthesized and characterized, namely [Mn2Mn(ox)3(L)4](ClO4) [L = 1,10-phenanthroline (phen) or 5-nitro-1,10-phenanthroline (NO2-phen), respectively], where ox stands for the oxalate dianion. Based on i.r., elemental analyses and electronic spectra, these complexes are proposed to have extended oxalatobridged structures consisting of MnII and MnIII ions, in which MnIII and each MnII ion has a distorted octahedral environment. The temperature dependence of magnetic susceptibility for [Mn2Mn(ox)3(phen)4] (ClO4) was measured over the 4.1–300 K range and the observed data were successfully simulated by an equation based on the spin-Hamiltonian operator ( = -2J(
1
2 +
2
3)), giving the exchange integral J = -1.57cm–1. This indicates weak antiferromagnetic spin exchange interaction between MnII and MnIII ions. 相似文献
10.
Shu-Lin Ma Zong-Hui Jiang Dai-Zheng Liao Shi-Ping Yan Geng-Lin Wang 《Transition Metal Chemistry》1994,19(5):531-533
Summary Two novel trinuclear complexes were prepared, namely [Cu2(oxae)2(H2O)2M] (ClO4)2, [oxae = N,N-bis(2-aminoethyl) oxamido dianion; M = Co and Ni]. Based on elemental analyses, conductivity measurements and i.r. spectra, the complexes are proposed to have extended oxamidobridged structures. The magnetic susceptibility of [Cu2-(oxae) 2(H2O)2Co](ClO4)2 were measured over the 4–300 K range and the observed data were successfully simulated by an equation based on the spin Hamiltonian, =–2J(1·2·2·3). The exchange integral, J, was found to be equal to –29.2 cm–1, indicating an antiferromagnetic spin-exchange interaction between the adjacent metal ions. 相似文献
11.
Yan-Hong Zhang Xue-Qiao Jia Gui-Ru Deng Qing-Lun Wang Guang-Ming Yang Dai-Zheng Liao 《Structural chemistry》2008,19(3):451-457
By using the macrocyclic oxamido-copper complex CuL (H2L = 2,3-dioxo-5,6:13,14-dibenzo-9,10-(O)cyclohexyl-1,4,8,11-tetraazacyclo-tetradeca-7,12-diene) as precursor, two new trinuclear
complexes with the formulas [(CuL)2Mn(ClO4)2] (1) and [(CuL)2Co(ClO4)2] (2) have been synthesized and structurally characterized. H-bonds are found between the molecules, which link adjacent trinuclear
units together to form a unique one-dimensional structure. The temperature dependence of the magnetic susceptibility for the
complexes was analyzed by means of the Hamiltonian
leading to J = −14.66 cm−1 and J = −22.9 cm−1 for 1 and 2, respectively.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献
12.
Wang Shi-bin Yang Guang-ming Yu Li-hua Wang Qing-lun Liao Dai-zheng 《Transition Metal Chemistry》2003,28(6):632-634
A dinuclear copper(II) [(LCu)(MeOH)Cu(phen)(MeOH)]ClO4·NO3 macrocyclic complex (where H2L = 2,3-dioxo-5,6:15,16-dibenzo-1,4,8,13-tetraazacyclo-pentadeca-7,13-diene; phen = 1,10-phenanthroline) has been synthesized and characterized by means of elemental analysis and its i.r. spectrum. Its crystal structure has been determined by single-crystal X-ray diffraction. In the complex, both the copper ions are penta-coordinated and have a distorted square pyramid configuration. Magnetic susceptibility measurements show antiferromagnetic exchange interactions (J = –207.64 cm–1) between the copper(II) ions. 相似文献
13.
Yan-Tuan Li Zong-Hui Jiang Shu-Lin Ma Xiao-Ying Li Dai-Zheng Liao Shi-Ping Yan Geng-Lin Wang 《Transition Metal Chemistry》1994,19(4):432-434
Summary Seven novel -oxamido hetero-metal binuclear complexes have been prepared and characterized, namely [Cu(oxae)-Ln(NO2-phen)2 (ClO4)](ClO4)2, where oxae denotes the N,N-bis(2-aminoethyl)oxamido dianion, NO2-phen denotes 5-nitro-1,10-phenanthroline and Ln is Nd, Eu, Gd, Tb, Dy, Ho or Er. The magnetic susceptibility of [Cu(oxae)Gd(NO2-phen)2(ClO4)](ClO4)2 was measured over a 4–300 K temperature range and the observed data were successfully simulated by an equation based on the spin Hamiltonian operator = -2J
1·2, giving the exchange integral for GdIII
J
(Cu-Gd) = -1.52cm-1. This indicated a weak antiferromagnetic interaction between the CuII and CdIII ions.Visiting scholar: Qufu Normal University.Visiting scholar: Tianjin Second Medical College. 相似文献
14.
Fan Yang Yan-Hong Zhang Qing-Lun Wang Guang-Ming Yang 《Transition Metal Chemistry》2009,34(7):809-813
Two novel oxamido-bridged macrocyclic complexes, [LCu(CH3OH)Co(phen)2](ClO4)2·CH3OH (1) and [LCu(CH3OH) Cu(phen)2](ClO4)2·CH3OH (2) (where H2L = 2,3-dioxo-5,6:13,14-dibenzo-7,10,12-trimethyl-1,4,8,11-tetraazacyclo-tetradeca-7,12-diene, phen = 1,10-phenanthroline),
have been prepared by stepwise synthesis and characterized. In both complexes, each Cu(II) atom from the precursor ligand
CuL is connected to a Co(II) (or Cu(II)) atom via the exo–cis oxygen atoms, resulting in a binuclear subunit. Magnetic susceptibility measurements in the 2–300 K temperature range have
been taken for the two complexes. 相似文献
15.
Danuta Czakis-Sulikowska Joanna Radwańska-Doczekalska Bożena Kuźnik Anna Malinowska 《Transition Metal Chemistry》1996,21(1):19-22
Summary AgI and CuII complexes with 2,4-bipyridyl (2,4-bipy or L) with the general formulae AgL2X (where X = NO
inf3
sup–
or ClO4
-), CuL2X2·2H2O (X = Cl- or Br-), CuL4SO4·4H2O, CuL4(NO3)2·2H2O and CuL4(ClO4)2·H2O have been isolated pure and characterized by analytical, spectral and magnetic measurements. The thermal decomposition of these complexes was studied under non-isothermal conditions in air. 相似文献
16.
Based on the complex ligand CuL (H2L = 2,3-dioxo-5,6:14,15-dibenzo-7,13-diphenyl-1,4,8,12-tetraazacyclo-pentadeca-7,13-diene), two novel oxamido-bridged trinuclear
complexes have been prepared. They are of the formula Cu(CuL)2(ClO4)2 · 4C2H5OH (1) and [(CuL)2Zn(C2H5OH)2](ClO4)2 · 2C2H5OH (2). The crystal structures of the two complexes have been determined by X-ray crystallography. In complex (1), the central Cu is in a complete square-planar environment, bonding to four oxygen atoms of the oxamido macrocyclic ligand,
while in complex (2), the Zn center is six-coordinate in an octahedral geometry, the four oxygen donors from macrocyclic ligand form the basal
plane and the axial positions are occupied by other oxygen atoms from C2H5OH molecules. The spectroscopic properties have been investigated and the EPR spectra have been simulated by WINEPR and SimFonia
programs. 相似文献
17.
Three new -oxalato-bridged heterotrinuclear copper(II)–iron(III)–copper(II) complexes have been synthesized and identified: [Cu2Fe(ox)3L2]ClO4 [L = 5-nitro-1,10-phenanthroline (NO2phen); 2,9-dimethyl-1,10-phenanthroline (Me2phen) or 2,2-bipyridine (bpy), respectively]; ox = the oxalato dianions. Based on elemental analyses, molar conductivity and magnetic moment (at room-temperature) measurements, i.r. and electronic spectral studies, extended ox-bridged structures consisting of two copper(II) and an iron(III) ions, in which the central iron(III) ion has an octahedral environment and the end-capped two copper(II) ions a square-planar environment, are proposed for these complexes. The [Cu2Fe(ox)3(Me2phen)2]ClO4
(1) and [Cu2Fe(ox)3(bpy)2]ClO4
(2) complexes were characterized further by variable-temperature magnetic susceptibility (4.2–300 K) measurements and the observed data were simulated by the equation based on the spin Hamiltonian operator, = –2J1 · 2, giving the exchange integrals J = –12.85 cm–1 for (1) and J = –11.28 cm–1 for (2). The results indicate the presence of an antiferromagnetic spin-exchange interaction between the copper(II) and iron(III) ions through the oxalato-bridge in both complexes (1) and (2). 相似文献
18.
Robin D. Rogers Lynn K. Kurihara Matthew M. Benning 《Journal of inclusion phenomena and macrocyclic chemistry》1987,5(5):645-658
The reaction of UO2(ClO4)·nH2O with 15-crown-5 and 18-crown-6 in acetonitrile yielded the title complexes. [UO2(OH2)5] [ClO4]2·3(15-crown-5)·CH3CN crystallizes in the triclinic space groupPT with (at–150°C)a=8.288(6),b=12.874(7),c=24.678(7) Å, =82.62(4), =76.06(5), =81.06(5)°, andD
calc=1.67 g cm–3 forZ=2 formula units. Least-squares refinement using 6248 independent observed reflections [F
o5(F
o)] led toR=0.111. [UO2(OH2)5] [ClO4]2·2(18-crown-6)·2CH3CN·H2O is orthorhombicP212121 with (at–150 °C)a=12.280(2),b=17.311(7),c=22.056(3) Å,D
calc=1.68 g cm–3,Z=4, andR=0.032 (3777 observed reflections). In each complex the crown ether molecules are hydrogen bonded to the water molecules of the pentagonal bipyramidal [UO2(OH2)5]2+ ions, each crown ether having exclusive use of two hydrogen atoms from one water molecule and one hydrogen from another water molecule. In the 15-crown-5 complex the remaining hydrogen bonding interaction is between one of the water molecules and one of the perchlorate anions. The solvent molecule has a close contact between the methyl group and a perchlorate anion suggesting a weak interaction. There are a total of three U-OH...OClO3 hydrogen bonds to the two perchlorate anions in [UO2(OH2)5] [ClO4]2·(18-crown-6)·2CH3CN ·H2O. The remaining coordinated water hydrogen bond is to the uncoordinated 2H2O molecule, which in turn is hydrogen bonded to a perchlorate oxygen atom and an acetonitrile nitrogen atom. One solvent methyl group interacts with an anion, the other with one of the 18-crown-6 molecules. Unlike the 15-crown-5 structure, the hydrogen bonding in this complex results in a polymeric network with formula units joined by hydrogen bonds from one of the solvent molecules and the uncoordinated water molecule.
Supplementary data relating to this article are deposited with the British Library as Supplementary Publication No. SUP 82051 (37 pages).For Part 10, see reference [1]. 相似文献
19.
Yu -Qing Qi Ming -Ming Miao Xian -Ru Sun Zong -Hui Jiang Dai -Zheng Liao Geng -Lin Wang 《Transition Metal Chemistry》1995,20(3):270-272
Summary Four novel manganese(II) binuclear complexes have been prepared and characterized, namely [Mn2(TCPHTA)(L)4]-(ClO4)2 [where L is 2,2-bipyridyl (bipy), 1,10-phenanthroline (phen), 4,4-dimethyl-2,2-bipyridyl (Me2bipy) or 5-nitro-1,10-phenanthroline (NO2-phen) and TCPHTA is the tetrachlorophthalate dianion]. Based on i.r. spectra, elemental analyses, conductivity measurements, extended tetrachlorophthalato-bridged structures consisting of two manganese(II) ions in which each manganese(II) ion has a distorted octahedral environment are proposed for these structures. The temperature dependence of the magnetic susceptibility for [Mn2(TCPHTA)(phen)4]-(ClO4)2·H2O was measured over the 4–300 K range and the observed data were successfully simulated by an equation based on the spin Hamiltonian operator ( = –2J
1·
2), giving the exchange integralJ = –1.05 cm–1. This result is indication of a weak antiferromagnetic spin exchange interaction between the metal ions. 相似文献
20.
Ten copper(II) complexes {[CuL1Cl] (1), [CuL1NO3]2 (2), [CuL1N3]2 · 2/3H2O (3), [CuL1]2(ClO4)2 · 2H2O (4), [CuL2Cl]2 (5), [CuL2N3] (6), [Cu(HL2)SO4]2 · 4H2O (7), [Cu(HL2)2] (ClO4)2 · 1/2EtOH (8), [CuL3Cl]2 (9), [CuL3NCS] · 1/2H2O (10)} of three NNS donor thiosemicarbazone ligands {pyridine-2-carbaldehyde-N(4)-p-methoxyphenyl thiosemicarbazone [HL1], pyridine-2-carbaldehyde-N(4)-2-phenethyl thiosemicarbazone [HL2] and pyridine-2-carbaldehyde N(4)-(methyl), N(4)-(phenyl) thiosemicarbazone [HL3]} were synthesized and physico-chemically characterized. The crystal structure of compound 9 has been determined by X-ray diffraction studies and is found that the dimer consists of two square pyramidal Cu(II) centers linked by two chlorine atoms. 相似文献