共查询到20条相似文献,搜索用时 15 毫秒
1.
G. X. Zheng Q. F. Wang S. G. Luo 《Journal of Radioanalytical and Nuclear Chemistry》2003,258(3):693-696
Four new complexes of UO2(II) and Th(IV) with bis-Schiff bases, derived from N,N'-bis[(l-phenyl-3-methyl-5-oxo-4-pyrazolinyl)-a-furylmethylidyne]-1,2-propylenediimine [1,2-BPMOPFP-H2] and N,N'- bis[(l-phenyl-3-methyl-5-oxo-4-pyrazolinyl)-a-furylmethylidyne]-1,3-propylenediimine [1,3-BPMOPFP-H2], were synthesized and characterized by elemental analysis, IR, UV, 1HNMR spectroscopy, and molar conductivity. The general formula of the complexes was confirmed to be [UO2(BPMOPFP)], [Th(BPMOPFP)(NO3)]NO3. A possible structure for the complexes have been proposed. 相似文献
2.
YANG Rui-Na XUE Bao-Yu WANG Dong-Mei JIN Dou-Man Henan Institute of Chemistry Zhengzhou Henan ChinaCHEN Jun LI Ming-Xing Department of Chemistry Fudan University Shanghai China 《中国化学》1997,15(1):76-83
At room temperature, dibenzoyl peroxide undergoes oxidative addition reaction with metallic copper powder and pyridine N-oxide (triphenylphosphine oxide or 2,9-dimethyl-4,7-diphenyl-1,10-phenanthrolin) which affords the last products as binuclear copper(II) complexes, [Cu(C5H5NO)-(C6H5COO)2]2(1), [Cu(OPPh3)(C6H5COO)2]2(2) and [Cu(C6H5COO)(C26H2oN2)](3, C26H2oN2 is 2,9-dimethyl-4,7-diphenyl-1,10-phenanthrolin). The structure of the complexes were characterized by elemental analyses, IR spectra, TG-DTA and magnetic property. Crystals(1) are triclinic, space group P1,a=0.92617(36),b=1.06973(17), c=1.08813(29) nm, a=59.60(2)°, β=74.83(3)°,γ=72.80(2)°, V=0.880 nm3, Dc=1.520 g/cm3, Z=1, R=0.044, Rw=0.048, Mr=805.78, 3477 reflections with I > 3σ(I). Each copper(Ⅱ) ion is coordinated by two bridging bidentate benzoate ligands and one pyridine N-oxide or triphenylphosphine oxide to form dimeric binuclear molecules. The structure of the compound(1) shows a clear centre of symmetry. 相似文献
3.
《Journal of Coordination Chemistry》2012,65(1):90-98
The bidentate benzimidazolic hpbm (1), [2-(2-hydroxyphenyl)-1H-benzimidazole], was obtained under mild conditions, and its corresponding metal complexes, di-µ-oxo dimanganese(IV,IV) [Mn2O2(hpbm)4 · 2Py · 5H2O] (2), and mononuclear complex [Co(hpbm)2] (3), were prepared and characterized. The crystal structures of 2 and 3 have been established by X-ray diffraction. Complex 2 consists of two six-coordinate manganese(IV) coordinated to two hpbm ligands and bridged by two O2? with a Mn–Mn distance of 2.777 Å. For 3, a Co(II) is coordinated to two deprotonated hpbm in a nearly tetrahedral environment. Hydrogen bonds play pivotal roles in constructing the dimensional structures of both the compounds. 相似文献
4.
Vimal K. Jain 《Transition Metal Chemistry》1996,21(6):494-497
Summary Binuclear PdII and PtII complexes of the type [M2Cl2(-Opy)2(PR3)2] [M = Pd or Pt; Opy = 2-OC5H4N (2-hydroxypyridinate ion); PR3 = PEt3, Pn-Bu3, PMe2Ph or PMePh2] were synthesized and characterized by elemental analysis, 1H- and 31P-n.m.r. spectroscopies. The Pd complexes exist in the sym trans form, whereas the corresponding Pt complexes were generated as different isomers. 相似文献
5.
Tameryn Stringer Prinessa Chellan Bruno Therrien Nelusha Shunmoogam-Gounden Denver T. Hendricks Gregory S. Smith 《Polyhedron》2009,28(14):2839-2846
A series of binuclear palladium(II) salicylaldiminato dithiosemicarbazone complexes have been synthesized and characterized. The palladium complexes were obtained by the reaction of various ethylene- and phenylene-bridged dithiosemicarbazones with Pd(PPh3)2Cl2. The free salicylaldimine ligands and their palladium complexes were characterized by NMR and IR spectroscopies, ESI-mass spectrometry, elemental analyses and for two representative complexes also by X-ray diffraction. In both metal complexes, the solid-state structures show the two palladium centers to be coordinated in a slightly distorted square-planar geometry, which gives rise in each case to five- and six-membered chelate rings. The salicylaldimine thiosemicarbazone ligands coordinate to palladium in a tridentate manner, through the phenolic oxygen, imine nitrogen and thiolate sulfur atoms. 相似文献
6.
Miao Ming-Ming Liao Dai-Zheng Jiang Zong-Hui Cheng Peng Shi Jing-Min Wang Geng-Lin 《Transition Metal Chemistry》1997,22(1):39-41
Six new binuclear nickel (II) complexes have been synth-esized and characterized, namely: [Ni2(4X-TP-HA)(L)4](ClO4)2 [L = 1,10-phenanthroline (phen), 5-nitro-1,10-phenanthroline (NO2-phen) or 2,2-bipyridyl (bipy)], where 4X-TPHA is the tetrabromoterephthalate dianion (X = Br) or the tetraiodoterephthalate dianion (X = I). Based on i.r. spectra, elemental analyses and conductivity measurements, these complexes are proposed to have terephthalato-bridged structures containing two NiII ions, each in a distorted octahedral environment. The temperature dependences of the magnetic susceptibility for [Ni2(4Br-TPHA)(phen)4]- (ClO4)2·H2O (1) and [Ni2(4I-TPHA)(phen)4]-(ClO4)2·- 2H2O (4) were measured over the 4–300K range and the observed data indicate weak antiferromagnetic spin exchange interaction between the metal ions. 相似文献
7.
S. Hussain I. U. Khan M. Akkurt S. Ahmad M. N. Tahir 《Russian Journal of Coordination Chemistry》2014,40(9):686-694
Two novel homobinuclear ytterbium(III) complexes, [Yb2(2AMB)6(H2O)4] · 2C2H6O (I) and Yb2(3AMB)6(H2O)4] · 3H2O (II) (2AMB = 2-aminobenzoic acid, 3AMB = 3-aminobenzoic acid) have been synthesized and characterized by elemental analysis, infrared spectroscopy, thermogravimetric analysis and X-ray crystallography (CIF files CCDC nos. 950103 (I), 921652 (II)). Complex I crystallizes in triclinic space group \(P\bar 1\) and complex II crystallizes in monoclinic space group P21/n. X-ray analysis shows that both complexes (I, II) have the dinuclear structure. The central Yb3+ ions in both complexes are eight-coordinated adopting distorted YbO8 dodecahedral geometry. Each Yb3+ ion is coordinated to two O atoms from bridging carboxylate, four O atoms from the chelating carboxylate ligands and two O atoms of water molecules. The crystal structure of I and II are stabilized by N-H…O, O-H…O, O-H…N, and C-H…O hydrogen bonds, C-H…π interactions and weak π-π stacking interactions. 相似文献
8.
9.
The stoichiometry of the reaction between ferrocyanide and thorium, neodymium, uranyl ion and mercury(II) has been investigated. The first three give single products irrespective of the order of addition of the reagents, but the last does not. If mercury(II) is added to ferrocyanide Hg(2)Fe(CN)(6) is obtained, but if ferrocyanide is added to mercury(II) various cyanide complexes of mercury are formed. The K(sp) values for the precipitates are reported. 相似文献
10.
Peng Cheng Shiping Yan Lingjun Bai Daizheng Liao Zonghui Jiang Genglin Wang 《Transition Metal Chemistry》1992,17(6):560-562
Three binuclear complexes, (VO)2(L)OMe (1), Co2(L)OEt·3/2H2O (2) and Zn2(L)OMe·H2O (3) have been prepared, where H3L is the binucleating ligand, 2,6-diformyl-4-methylphenol di(benzoylhydrazone). The magnetic susceptibilities of (1) and (2) were measured over the 4.2–300 K range and the observed data were fitted to the Bleaney-Bowers equation by the least-squares
method, giving the exchange integral 2J = −358.5cm−1 for (1) and 2J = −6.6cm−1 for (2). This procedure indicates the existence of an antiferromagnetic interaction between the metals.
TMC 2699 相似文献
11.
Six new μ-phthalato binuclear oxovanadium(IV) complexes, namely [(VO)2(PHTH)-(L)2]SO4 (L denotes 2,2′-bipyridine (bpy); 1,10-phenanthroline (phen); 4,4′-dimethyl-2,2′-bipyridine (Me2 bpy); 5-nitro-1,10-phenanthroline (NO2-phen); 5-chloro-1,10-phenanthroline (Cl-phen) and 5-methyl-1,10-phenanthroline (CH3-phen), where PHTH is the phthalate dianion), have been synthesized and characterized by elemental analyses, IR, electronic spectra, magnetic moments at room temperature and molar conductivity measurements. The temperature dependence of the magnetic susceptibility of complexes [(VO)2(PHTH)(phen)2]SO4 (1) and [(VO)2(PHTH)(CH3-phen)2]SO4 (2) was measured in 4—300 K range and the observed data were successfully simulated by the equation based on the spin Hamiltonian operator, ?=?2J?1·?2, giving the exchange integrals J=?12.8 cm?1 for 1 and J=?7.9 cm?l for 2. This indicates an antiferromagnetic spin-exchange interaction between the metal ions within each molecule. 相似文献
12.
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
13.
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
14.
Three new binudear cobalt (II) complexes with extended te-tracarboxylato- bridge have been synthesized and characterized, namely [Co2 (PMTA) (bpy)4] (1), [Co2(PMTA)-(phen)4] (2) and [Co2(PMTA) (NO2phen)4] (3), where PMTA represents the tetraanion of pyroniellitic acid, and bpy, phen, NO2-phen denote 2,2'-bipyridine, 1,10-phenan-throline; 5-nirto-1, 10-plienanthroline, respectively. Based on elemental analyses, molar conductivity measurements, IR and electronic spectra studies, it is proposed that these complexes have PMTA-bridged structures and consist of two cobalt (II) ions, each in a distorted octahedral environment. These complexes were further characterized by variable temperature magnetic susceptibility measurements (4-300 K) and the observed data were successfully simulated by the equation based on the spin Hamiltonian operator, giving the exchange integral J = - 1.02 cm-1 for 1, J = -1.21 cm-1 for 2 and J = - 1.18 cm-1 for 3, respectively. These results revealed the operation of antiferromagneti 相似文献
15.
《Journal of Coordination Chemistry》2012,65(19):3395-3402
The reaction of 2-thiazoline-2-thione (TZDSH) with SnR2Cl2 (R=Ph 1, Me 2, Bu 3) in dry ethanol in the presence of sodium ethoxide leads to [SnR2(C3H4NS2)2] (1, 2, and 3), respectively. Reaction between TZDSH and SnPh2Cl2 in dichloromethane and dry ethanol in an inert atmosphere produces [SnPh2Cl2(C3H5NS2)2] (4). The yields of the products were over 80%. These new complexes have been characterized by IR, UV-Vis, multinuclear (1H, 13C, and 119Sn) NMR spectroscopy, and mass spectrometry, as well as elemental analysis. 相似文献
16.
Summary Binuclear NiII and CoII complexes derived from 2,6-diformyl-4-methylphenol and various aromatic monoamines have been prepared and investigated. The NiII complexes have Ni2LCl3 composition while the CoII complexes have Co2L2Cl2 composition, where L represents the organic ligand. The complexes are active catalysts in the oxidation of 3,5-di-t-butylcatechol (3,5-DTBC) by dioxygen, but less so than their Cu analogues. This result is attributed to the absence of antiferromagnetic coupling between the metal centres. 相似文献
17.
Summary Two binuclear AgI complexes, [{Ag(dppp)}2](NO3)2 (1) and [{Ag(dppb)}2(NO3)]2 (2) (dppp = Ph2P(CH2)3PPh2, dppb = Ph2P(CH2)4PPh2], were synthesized and characterized by elemental analysis, t.g., i.r. and 31P-n.m.r. spectra. Single crystals of complex (2) were obtained from MeOH-CHCl3. The X-ray crystal structure shows that the dppb ligand is bidentate, with two ligands bridging two metal ions to form a centrosymmetric dimer. 相似文献
18.
Yang Ruina Lin Kunhua Hou Yimin Wang Dongmei Jin Douman Luo Baosheng Chen Liaorong 《Transition Metal Chemistry》1997,22(3):254-258
Binuclear copper(I) complexes [Cu(dppm)(NO3)]2 (1), dppm=Ph2PCH2PPh2, [Cu(dppm)(2,9-Me2Phen)]2(NO3)2 (2), [Cu(dppm)(I)]2 (3) and [Cu(dppm)(py)]2(NO3)2 (4), (py=pyridine) have been synthesized by ligand reduction of cupric nitrate with dppm in EtOH and characterized by elemental analyses, molecular weight determination, t.g.a., 31P-n.m.r spectra; their electronic conductivities and c.v. waves have also been measured. The results show that dppm coordinates as a bridging bidentate ligand to the CuI atoms, and that NO3 behaves as a monodentate ligand or free ion in the newly prepared complexes. 相似文献
19.
《Journal of Coordination Chemistry》2012,65(17):1921-1928
2-Butenedioic acid (Z)-monophenyl ester and its complexes with tetravalent thorium and cerium have been synthesized and characterized by means of elemental analysis, TG-DTA, IR, 1H NMR and 13C NMR spectra. Chemical analysis and TG-DTA analysis indicated that the complexes possess the formula: ML2(OH)2 (M?=?Th or Ce; L?=?(Z)-monophenyl ester-2-butenedioate ion). The spectroscopic studies showed that besides the bidentate carboxylate bonded to the central tetravalent metal ions, the ethereal oxygen also coordinated. This was indicated by a higher wave number shift of νC=O in the complexes than that of free ligand and its sodium salt, and a remarkable upfield chemical shift of carbon atom (C-8) in the p-position of ethereal oxygen substituted phenyl. 相似文献
20.
Summary Mixed ligand complexes of the type [VOLA]ClO4 where L=5-bromosalicylaldehyde (L) or 5-nitrosalicylaldehyde (L) and A=2, 2-dipyridyl (A) or 1, 10-phenanthroline (A) have been prepared. Treatment of the mononuclear complexes, [VOLA]ClO4, withp-phenylenediamine (ppd) orm-phenylenediamine (mpd) yielded homobinuclear [VOLA-NC6H4N-LAVO](ClO4)2, complexes, which were characterised by elemental analyses, spectra, magnetic susceptibility and molar conductance measurements. 相似文献