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1.
Ming-Ming Miao Dai-Zheng Liao Zong-Hui Jiang Geng-Lin Wang 《Transition Metal Chemistry》1995,20(5):445-447
Summary Four novel trinuclear copper(II) complexes have been synthesized, namely {[Cu(pbaOH)][Cu(L)]2}(ClO4)2, where pbaOH = 2-hydroxy-1,3-propanediylbis(oxamato) and L is 1,10-phenanthroline (phen), 5-nitro-1,10-phenanthroline (NO2-phen), 2,2-bipyridyl (bipy) or 4,4-dimethyl-2,2-bipyridyl (Me2bipy). Based on i.r. and electronic spectra, elemental analyses, and conductivity measurements oxamato-bridged structures consisting of three copper(II) ions, in which each copper(II) ion has a square-planar environment, are proposed. The temperature-dependent magnetic susceptibility of {[Cu-(pbaOH)][Cu(phen)]2}(ClO4) 2 has been studied in the 4.2–300 K range, giving the exchange integral J=- 111.9cm–1. The result revealed the operation of an antiferromagnetic spin-exchange interaction between adjacent copper ions. 相似文献
2.
Miao Ming-Ming Cheng Peng Liao Dai-Zheng Jiang Zong-Hui Wang Geng-Lin 《Transition Metal Chemistry》1997,22(4):330-332
Four new heterotrinuclear complexes have been prepared and characterized, namely {[Co(L)2]2[Cu (opba)]}(ClO4)2, where opba=o-phenylenebis(oxamato) and L=1,10-phenanthroline (phen), 5-nitro-1,10-phenanthroline (NO2-phen), 2,2-bipyridyl (bpy) and 4,4-dimethyl-2,2-bipyridyl (Me2bpy). The temperature dependence of the magnetic susceptibility of {[Co(phen)2]2[Cu(opba)]}(ClO4)2 has been studied in the 4–300K range, the MT versus T plot exhibits a minimum at ca. 131K, but abnormal magnetic behaviour below 83K. 相似文献
3.
Ming-Ming Miao Dia-Zheng Liao Zong-Hui Jiang Geng-Lin Wang 《Transition Metal Chemistry》1995,20(4):399-401
Summary Four novel MnII binuclear complexes have been prepared and characterized, namely: [Mn2(TBPHTA)(L)4](ClO4)2 [L = 2,2-bipyridyl (bipy), 1,10-phenanthroline (phen), 4,4-dimethyl-2,2-bipyridyl (Me2bipy) and 5-nitro-1,10-phenanthroline (NO2-phen), respectively], and TBPHTA = the tetrabromophthalate dianion. Based on i.r. spectra, elemental analyses and conductivity measurements, extended tetrabromophthalato-bridged structures consisting of two MnII ions, in which each MnII ion has a distorted octahedral environment, are proposed for these complexes. The temperature dependence of the magnetic susceptibility for [Mn2(TBPHTA)(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 integral J = -1.22 cm–1. This result indicates a weak antiferromagnetic spin exchange interaction between the metal ions. 相似文献
4.
State Miao Ming-Ming Liao Dai-Zheng Jiang Zong-Hui Cheng Peng Wang Geng-Lin 《中国化学》1996,14(4):326-330
Four new heterotrinuclear complexes have been synthesized and characterized, namely {[Ni(L)2]2[Cu(opba)]}(ClO4)2, where opba denotes o-phenylenebis(oxamato) and L stands for 1,10-phenanthroline(phen) (1), 5-nitro-l,10-phenanthroline(NO2-phen) (2), 2,2′-bipyridyl(bpy) (S) and 4,4′-dimethyl-2,2′-bipyridyl(Me2bpy) (4). The temperature dependence of the magnetic susceptibility of {[Ni(phen)2]2[Cu(opba)]}(ClO4)23H2O has been studied in the 4–300 K range, giving the exchange integral J—109 cm?1. The HMT vs. T plot exhibits a minimum at about 100 K, characteristic of this kind of coupled polymetallic complex with an irregular spin-state structure. 相似文献
5.
Ming-Ming Miao Dai-Zheng Liao Zong-Hui Jiang Geng-Lin Wang 《Transition Metal Chemistry》1994,19(6):643-645
Summary Four novel heterotrinuclear complexes were prepared, namely {[Ni(L)2]2[Cu(pba)]}(ClO4)2, where pba = pro-pylene-1,3-bis(oxamato) and L = 1,10-phenanthroline (phen), 5-nitro-1,10-phenanthroline (NO2-phen), 2,2-bipyridyl (bpy), 4,4-dimethyl-2,2-bipyridyl (Me2bpy). Based on i.r., elemental analyses, conductivity measurements and electronic spectra oxamato-bridged structures are proposed for these complexes, consisting of two nickel(II) ions, each in a distorted octahedral environment, and a copper(II) ion in a square planar environment, respectively. The temperature dependence of the magnetic susceptibility of {[Ni(phen)2]2[Cu(pba)]}(ClO4)2·H2O was studied in the 4–300 K range, giving the exchange integral J = - 106 cm–1. TheX
scm
T versusT plot exhibited a minimum at ca. 98 K, characteristic of this kind of coupled polymetallic complex with an irregular spin-state structure. E.s.r. spectra of these complexes clearly indicated a strong rhombicity withg
1 = 5.20,g
2 = 2.29 andg
3 = 2.02 (approximately), which agrees with an anisotropicS = ±1/2 Kramer doublet in the ground state. 相似文献
6.
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
7.
K. G. S. Murthy K. N. Mahendra N. M. N. Gowda G. K. N. Reddy 《Transition Metal Chemistry》1985,10(6):236-238
Summary Reactions of ruthenium carbonyl complexes of the type [RuX2(CO)(Ph2RAs)3] (X=Cl or Br; R=Me or Et) with 2,2-bipyridyl (bipy) and 1,10-phenanthroline (phen) in alcohol produce orange red cationic products of the formula [RuX(CO)(N-N)(Ph2RAs)2]ClO4 (N-N=bipy or phen). Likewise, the hydridocarbonyls of ruthenium and osmium of the type [MHX(CO)(Ph2RAs)3] (M=Ru or Os) react with bipy and phen to yield yellow cationic complexes of the composition [(MH(CO)(N-N)(Ph2RAs)2]ClO4. Structures have been assigned to all the complexes on the basis of i.r. and1 H n.m.r. spectral data. 相似文献
8.
Fátima Nunes Serralha José Madeira Lopes Francisco Lemos Duarte Prazeres Maria Aires-Barros Joo Rocha Joaquim Cabral Fernando Ramôa Ribeiro 《Reaction Kinetics and Catalysis Letters》2000,69(2):217-222
Novel [CrIII(amp)(bipy)(Cl)] (1) (H2amp = N-(hydroxyphenyl)salicyldimine; bipy = 2,2-bipyridyl) and [CrIII(app)(bipy)(Cl)]+ (2) (H2app = N-(hydroxyphenyl)pyridine-2-carboxaldimine; bipy = 2,2-bipyridyl) complexes have been synthesized and characterized by physico-chemical methods. Complexes 1 and 2 have been employed as catalysts in the oxidation of both saturated and unsaturated hydrocarbons using tert-butylhydroperoxide (t-BuOOH). The significance of the results with respect to oxo-functionalization of C-H bonds both in unsaturated and saturated hydrocarbons is noted. 相似文献
9.
Si-Wei Zhang Dai-Zheng Liao Zong-Hui Jian Shi-Ping Yan Geng-Lin Wang 《Transition Metal Chemistry》1995,20(1):72-75
Summary New three CuII-CuII-CuII homotrinuclear complexes have been synthesized, namely [Cu(dmg)2{CuL}2](ClO4)2 [L = 5-nitro-1,10-phenanthroline (5-NO2-phen), 4,4-dimethyl-2,2-bipyridiine (DMbpy), tetramethylenediamine (TMDA) and dimethylglyoximate ion (dmg)2-]. The magnetic susceptibilities of complexes (1) (L = 5-NO2-phen) and (2) (L = DMbpy) were measured in the 4.2–300 K range, giving the parameters,J = -335cm-1 (1) andJ= -327.5cm-1 (2). The results demonstrate a very strong antiferromagnetic exchange interaction between the adjacent copper(II) ions. 相似文献
10.
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
11.
Liu Jiacheng Song Zhigang Wang Liufang Zhuang Jinzhong You Xiaozeng Huang Xiaoying 《Transition Metal Chemistry》1999,24(5):499-502
A new benzimidazoyl ligand bis[(N-ethylbenzimidazol-2-yl)methyl]ether (EDGB) and CuII complexes [Cu(L1) (L2)](ClO4)·mEt2O·nH2O [L1 = bis[(benzimidazol-2-yl)methyl]ether (DGB) or EDGB, L2 = 2,2-bipyridine (bipy) or 1,10-phenanthroline (phen)] have been synthesized and characterized by elemental analyses and i.r. spectra. The single-crystal structure of the [Cu(phen)(DGB)(OClO3)]ClO4·Et2O·0.5H2O complex was determined by X-ray diffraction. The geometry around Cu is best described as a distorted octahedron with four nitrogen atoms from phen and DGB ligands forming the equatorial plane. The oxygen atoms of DGB and one perchlorate group are in the axial positions with semi-coordinated bonding modes. The electrochemical behavior of the complexes is described. 相似文献
12.
Summary Complexes of manganese(II) and iron(II) picrates with various bidentate (L) and monodentate (L) heterocyclic bases have been synthesised; their compositions have been established as [ML3]A2 (1), [ML2 · 2 H2O]A2 (2), [ML6]A2 (3) and [ML4 · 2 H2O]A2 (4), where M = FeII and MnII, L = 2,2-bipyridyl (bipy) and 1,10-phenanthroline (phen) in (1), A = picrate anion; M = MnII, L = bipy and phen in (2); M = FeII, L = pyridine (py), 4-picoline (4-pic) and 3-picoline (3-pic) in (3); M = MnII, L = py, 4-pic, quinoline (quin) and 2,6-lutidine (2,6-lut) in (4) and also M = FeII, L = quin and 2,6-lut. 相似文献
13.
Dai-Zheng Liao Qian-Hua Zhao Zhi-Young Zhang Gen-Lin Wang 《Transition Metal Chemistry》1991,16(2):209-211
Summary The binuclear metal complexes [Cu(sampn)Co(L)2] (L=bipy, phen), have been prepared by the reaction of sodiumN,N-1,2-propanedisalicylamidatocuprate(II) heptahydrate, Na2[Cu(sampn)] 7H2O, with a divalent metalion, and 2,2-bipyridine or 1, 10-phenathroline. The complexes were characterized by variable-temperature magnetic susceptibility measurements; the results indicate that a weak antiferromagnetic spin-exchange interaction operates between the metal ions. 相似文献
14.
Sun Xian-Ru Miao Ming-Ming Cheng Peng Liao Dai-Zheng Jiang Zong-Hui Wang Geng-Lin 《Transition Metal Chemistry》1997,22(3):302-303
Two novel CuII3MnIII2 pentanuclear oxalato complexes have been synthesized and characterized, namely [Cu(L)]3[Mn(ox)3]2 [L = 1,10-phenanthroline(phen) and 2,2-bipyridyl(bipy)] where ox is the oxalate dianion. Based on i.r., elemental analyses and electronic spectra, thesecomplexesareassignedtoextendedoxalato-bridged structures consisting of two manganese(III) ions and three copper(II) ions, in which each manganese(III) has a distorted octahedral environment and each copper(II) ion a distorted square pyramidal environment. The temperature dependance of the magnetic susceptibility for [Cu(phen)]3[Mn(ox)3]2·4H2O was measured over the 4.2–300K range and the observed data indicates antiferromagnetic spin exchange interaction between the CuII and MnIII ions. 相似文献
15.
Sun Xian-Ru Cheng Peng Cui Jian-Zhong Liao Dai-Zheng Jiang Zong-Hui Yan Shi-Ping Wang Geng-Lin 《Transition Metal Chemistry》1997,22(1):65-67
Three new cobalt(II) binuclear complexes have been prepared and characterized, namely [Co2(TCPHTA)(L)4](ClO4)2 [L=1,10-phenanthroline (phen), 5-nitro-1,10-phenanthroline(NO2-phen) and 2, 2-bipyridyl (bipy), respectively], where TCPHTA is the tetrachlorophthalate dianion. Based on i.r. spectra, elemental analyses and conductivity measurements, tetrachlorophthalato-bridged structures consisting of two cobalt(II) ions in which each cobalt(II) ion has a distorted octahedral environment are proposed for these complexes. The temperature dependence of the magnetic susceptibility for [Co2(TCPHTA)(L)4](ClO4)2·nH2O (L=phen, NO2-phen and bipy) has been measured over the 77–300 K range and the observed data successfully simulated by an equation based on the spin Hamiltonian operator (H=–2JS1S2), giving the exchange integral J=–2.92, –3.45, –4.03 cm–1, respectively. This result indicates the presence of a weak antiferromagnetic spin exchange interaction between the metal ions. 相似文献
16.
Zong-Hui Jiang Chao-Li Deng Dai-Zheng Liao Shi-Ping Yan Geng-Lin Wang 《Transition Metal Chemistry》1993,18(3):345-347
Summary Four new trinuclear copper(II) complexes, [Cu(phen)-(NBzIm)] (ClO4) (1), [Cu(bpy)(NBzIm)](ClO4) (2), [Cu-(Me2-bpy)(NBzIm)](Ac)·1/2H2O (3) and [Cu(Me2-bpy)-(Im)](ClO4)·1/2H2O (4) (phen = 1, 10-phenanthroline, bpy = 2,2-bipyridine, NBzIm = 6-nitrobenzimidazolate ion, Im=imidazolate ion) have been prepared and characterized by variable temperature magnetic susceptibility measurements. A weak antiferromagnetic spin exchange interaction operates between copper(II) ions, exchange integrals evaluated as J =-23.82 cm-1 for (1); and J=-21.91 cm-1 for (2). 相似文献
17.
Summary Mixed-ligand complexes formed by reaction of Cu(ClO4)2 with 3-(2-pyridyl)-5,6-diphenyl-1,2,4-triazine (dppt) as primary ligand and 2,2-bipyridine (bipy), 1,10-phenanthroline (phen), 2,9-dimethyl-1,10-phenanthroline (dmp), N,N-bis(pyrid-2-ylmethyl)amine (dipica), N,N-bis(benzimidazol-2-ylmethyl)amine (bba), 1,3-bis(2-benzimidazolyl)-2-thiapropane (bbms) and 1,5-bis(benzimidazolyl)-3-thiapentane (bbes) as the secondary ligands have been isolated. They are of the type [Cu(dppt)L](ClO4)2·nH2O, where n = 0 or 2. All complexes exhibit only one ligand field band and their cryogenic solution e.p.r. spectra are axial, with vmax and g
values diagnostic of a square-based geometry. The spectral and redox data are consistent with facial coordination of the tridentate ligands. All the complexes exhibit a positive redox potential (versus n.h.e.). The weak -bonding of dppt, caused by the highly electron-withdrawing phenyl rings, the strong -back bonding involving phen and dmp, and interligand repulsions appear to be responsible for the relatively positive CuII/CuI redox potentials. 相似文献
18.
Summary Rhodium(I) and iridium(I) mixed complexes of the formulae [M(diolefin)LL]ClO4, [M(diolefin)L2L]ClO4, [(diolefin)LIr(-L)2IrL(diolefin)](ClO4)2, [(diolefin)LM(-L-L)ML'(diolefin)](ClO4)2, [(diolefin)Rh{-(L-L)}2Rh(PPh3)2](ClO4)2 and [(diolefin)LIr{-(L-L)}2IrL (diolefin)](C1O4)2, (L=monodentate sulphur ligand, L-L=bidentate sulphur ligand, L=group Vb ligand; M=Rh, diolefin=1,5-cyclooctadiene (COD) or 2,5-norbornadiene (NBD); M=Ir, diolefin=COD) are described.Author to whom all correspondence should be directed. 相似文献
19.
Summary Reactions of bis(1-oxopyridine-2-thione) NiII or CuII with 2,2-bipyridine (bipy) or 1,10-phenanthroline (phen) yield complexes of stoichiometry: Ni(C5H4NOS)2L {L = bipy, two isomers: (1) and (2), L = phen, one isomer (3)} and Cu(C5H4NOS)2(phen)·0.75CHCl3
(4). The spectroscopy (i.r., u.v.-vis., e.s.r.) and magnetism studies of the above complexes are described. On the basis of conductivity, the CuII-phen complex has been formulated as [Cu(C5H4NOS)(phen)2][Cu(C5H4NOS)3]·1.5CHCl3
(4). The vis. absorption spectra support similar octahedral structures for the minor bipy isomer (2) and for the NiII-phen complex [(3)], whereas the major isomer [(1)] has a different structure. The e.s.r. spectrum of the CuII-phen complex (4) is commensurate with an elongated octahedral structure. New methods for the preparation and spectroscopy of M(C5H4NOS)2 (M = Mn, Ni, Cu or Zn) compounds have been investigated. 相似文献
20.
Giovanni Coni Marcella Massacesi Gustavo Ponticelli Giovanna Puggioni Costantino Putzolu 《Transition Metal Chemistry》1987,12(4):379-381
Summary Palladium(II) and platinum(II) complexes [MLX2], where L=2-(4-methyl-2-pyridyl)benzimidazole (mpbi), 2-(4-methyl-2-pyridyl)benzoxazole (mpbo), 2-(4-methyl-2-quinolyl)benzoxazole (mpbo), 2-(4-methyl-8-quinolyl)benzoxazole (mq'bo), X=Cl. Br, together with M(mqbo)2Br2 and Pt2(mpbt)Cl4, where mpbt=2-(4-methyl-2-pyridyl)benzthiazole, have been synthesized and characterized by conductivity and magnetic measurements as well as by i.r. and electronic spectra. The ligands are bidentate chelates through the pyridine or quinoline and isoxazole or imidazole nitrogen atoms. The [MLX2] derivatives arecis, square planar. 相似文献