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1.
E. V. Lider V. N. Elokhina L. G. Lavrenova Yu. G. Shvedenkov L. A. Sheludyakova E. V. Peresypkina 《Russian Journal of Coordination Chemistry》2007,33(1):37-44
Novel oligonuclear complexes of Co(II), Ni(II), and Cu(II) with 4-(3,4-dichlorophenyl)-1,2,4-triazole (L) of the composition [M3L10(H2O)2](NO3)6 (M = Co(II), Ni(II)), [Ni3L6(H2O)6]Hal6 (Hal = Cl?, Br?), and [Cu5L16(H2O)2](NO3)10 · 2H2O were synthesized and studied by magnetic susceptibility, electronic and IR spectroscopy, and powder X-ray diffraction methods. All the above complexes are X-ray amorphous. Antifer-romagnetic exchange interactions between the M2+ ions were discovered in the [Co3L10(H2O)2](NO3)6 and [Ni3L10(H2O)2](NO3)6 complexes, whereas ferromagnetic exchange interactions were observed in the complexes [Ni3L6(H2O)6]Cl6, [Ni3L6(H2O)6]Br6, and [Cu5L16(H2O)2](NO3)10 · 2H2O. 相似文献
2.
《Journal of Coordination Chemistry》2012,65(3):199-215
New heteronuclear complexes containing oxorhenium(V), Cu(II), Ni(II), Fe(III), UO2(VI) and Th(IV) ions were prepared by the reaction of the complex ligand, [ReO(H4L)Cl]Cl2, where H4L = 8,17-dimethyl-6,15-dioxo-5,7,14,16-tetrahydrodibenzo[a,h][14]annulene-2,11-dicarboxylic acid, with the previous transition and actinide salts. Three heteronuclear Cu(II) complexes were isolated depending on the ratio of [ReO(H4L)Cl]Cl2?:?Cu(II) ion. When the ratios were 1?:?0.5, 1?:?1 and 1?:?2, the heteronuclear complexes {[ReO(H3L)Cl]2CuCl2(OH2)2}SO4 · H2O (I), [ReO(H3L)Cl2Cu(OH2)2(SO4)] (II) and {ReO(H2L)Cl[Cu(OH2)3 SO4]2} (III) were obtained, respectively. Heteronuclear complexes of the other metal cations were obtained by mixing [ReO(H4L)Cl]Cl2 with the metal salt in the ratio 1?:?1 to obtain the heteronuclear complexes [ReO(H3L)Cl2Ni(OH2)2](NO3)2 (IV), [ReO(H3L)Cl3Fe(OH2)3](NO3)2 (V), [ReO(H3L)ClUO2(NO3)2 (OH2)]Cl (VI) and [ReO(H3L)Cl3Th(NO3)2(OH2)]NO3 · 2H2O (VII). The complex ligand coordinates with the heterometal ion via the carboxylate group, and the infrared bands νas COO and νs COO indicate that the carboxylate acts as a unidentate ligand to the heterometal cations. Cu(II) and Fe(III) cations in the heteronuclear complexes have octahedral geometry, while Ni(II) is square planar. Thermal studies explored the possibility of obtaining new heteronuclear complexes pyrolytically in the solid state from the corresponding mother complexes. The structures of the complexes were elucidated by conductance, IR and electronic spectra, magnetic moments, 1H NMR and TG-DSC measurements as well as by mass spectroscopy. 相似文献
3.
Shakirova O. G. Lavrenova L. G. Shvedenkov Yu. G. Berezovskii G. A. Naumov D. Yu. Sheludyakova L. A. Dolgushin G. V. Larionov S. V. 《Russian Journal of Coordination Chemistry》2004,30(7):473-479
New complexes of iron(II), cobalt(II), and nickel(II) with 4-(2-pyridyl)-1,2,4-triazole (PyTrz), [Fe3(PyTrz)8(H2O)4]A6 (A = NO3
-, ClO4
-, Br-) and [M3(PyTrz)8(H2O)4](NO3)6 (M = Co, Ni), were synthesized and studied by X-ray diffraction, magnetochemical method, and electronic and IR spectroscopy. The complex [Fe3(PyTrz)8(H2O)4](NO3)6) was also studied by adiabatic calorimetry. The Fe(II), Co(II), and Ni(II) nitrate complexes were shown to be isostructural to the previously synthesized linear trinuclear [Cu3(PyTrz)8H2O)4](NO3)6 complex. In all compounds, antiferromagnetic exchange interactions between M2+ ions were detected. The complex [Fe3(PyTrz)8(H2O)4](NO3)6 undergoes the 1
A
1 5
T
2 spin transition. 相似文献
4.
《Journal of Coordination Chemistry》2012,65(22):3887-3899
The complexes [NiCl2(PyTn)2]?·?2H2O (1), [Ni(H2O)2(PyTn)2](NO3)2 (2), [Ni(H2O)2(PzTz)2]Cl2 (3) and [Ni(H2O)2(PzTz)2](NO3)2 (4) [PyTn?=?2-(1-pyrazolyl)-2-thiazoline; PzTz?=?2-(1-pyrazolyl)-1,3-thiazine] have been prepared and characterized by elemental analysis, electronic spectroscopy, IR spectroscopy and single crystal X-ray diffraction to determine if the size of the S,N-heterocycle influences coordination to Ni(II). The four complexes are six coordinate as a distorted octahedron. The disposition of chlorides and water is trans in 1 and 2, whereas 3 and 4 are cis, as a consequence of the steric strain induced by the larger S,N-ring. 相似文献
5.
Norah Barba-Behrens America Vázquez-Olmos Silvia E. Castillo-Blum Germund Höjer Sara Meza-Höjer Rosa María Hernández María de Jesús Rosales-Hoz Ramón Vicente Albert Escuer 《Transition Metal Chemistry》1996,21(1):31-37
Summary The following coordination compounds derived from 2-guanidinobenzimidazole (2GB) (1); [Ni(2GB)2]Cl2· H2O, (2); [Ni(2GB)2]Br2·3H2O, (3); [Ni(2GB)2-(NO3)2, (4); [Ni(2GB)2](OAc)2, (5); [Cu(2GB)Cl2], (6); [Cu(2GB)Br2], (7); [Cu(2GB)2]Br2·2H2O, (8); [Cu(2GB)2](NO3)2·H2O, (9); [Cu(2GB)2](OAc)2· H2O, (10); [Zn(2GB)Cl2]·H2O, (11); [Zn(2GB)Br2]·H2O, (12); [Co(2GB)Cl2(H2O)2]·5H2O, (13); [Co-(2GB)2Cl2]·3H2O, (14); [Co(2GB)2(H2O)2](NO3)2· 4H2O, (15); and [Co(2GB)2(H2O)2](OAc)2, (16) have been synthesized and characterized by i.r. and electronic spectroscopy. In addition (6)–(10) were analysed by e.p.r. The X-ray diffraction structure of compound (4) was obtained. It crystallizes in the monoclinic system, C2/c (a = 22.511(7), b = 6.735(6) and c= 15.345(5)Å, =115.31(3)°, Z = 4, final R = 0.0360 and R
w = 0.0388 for 1167 observed independent reflections). The nickel(II) atom coordinates two ligands in a square-planar geometry through the imidazolic N(3) and the guanidino N(12).The probable ligand isomers involved in the coordination were determined by theoretical calculations, and the possible structures of the coordination compounds were investigated in order to verify that the experimentally proposed structures were stable. Two different types of coordination compounds were found. One, where the ligand is chelating through the imidazolic N(3) and the guanidino N(12), which is the case for most of the complexes [(2)–(13)]. With only one ligand in the coordination sphere, the structure was either tetrahedral (copper and zinc chloride and bromide complexes) or octahedral (cobalt). With two chelating 2GB units a square-planar geometry was stabilized [(2)–(5) and (8)–(10)]. The second type of coordination behaviour was observed in the cobalt compounds [(14)–(16)]. Here the ligand coordinates monodentate through the imidazolic N(3); the structure is tetrahedral. 相似文献
6.
《Journal of Coordination Chemistry》2012,65(18):1555-1566
Reaction of the N-(2-pyridyl)carbonylaniline ligand (L) with Cu(NO3)2, Cu(ClO4)2, Zn(ClO4)2, Ni(NO3)2 and PdCl2 gives complexes with stoichiometry [Cu(L)2(H2O)2](NO3)2, [Cu(L)2(H2O)2](ClO4)2, [Zn(L)2(H2O)2] (ClO4)2, [Ni(L)2(H2O)Cl](NO3) and PdLCl2. The new complexes were characterized by elemental analyses and infrared spectra. The crystal structures of [Cu(L)2(H2O)2](NO3)2, [Cu(L)2(H2O)2](ClO4)2, and [Zn(L)2(H2O)2](ClO4)2 were determined by X-ray crystallography. The cation complexes [M(L)2(H2O)2] contain copper(II) and zinc(II) with distorted octahedral geometry with two N-(2-pyridyl)carbonylaniline (L) ligands occupying the equatorial sites. The hexa-coordinated metal atoms are bonded to two pyridinic nitrogens, two carbonyl oxygens and two water molecules occupying the axial sites. Both the coordinated water molecules and uncoordinated amide NH groups of the N-(2-pyridyl)carbonylaniline (L) ligands are involved in hydrogen bonding, resulting in infinite hydrogen-bonded chains running in one and two-dimensions. 相似文献
7.
Synthesis and structural studies of Co(II) and Ni(II) complexes of glutaric- and adipic dihydrazides
Glutaric dihydrazide (GDH) and adipic dihydrazide (ADH) have been found to react with Co(II) chloride and Ni(II) chloride and nitrate in ethanolic solution to form complexes of the general empirical compositionsMLCl2,ML
2Cl2 and [NiL
2(H2O)2] (NO3)2 whereM=Co(II), Ni(II) andL=GDH,ADH. Tetrahedral geometry has been proposed for 11 complexes of Co(II) and octahedral geometry for the remaining complexes based on measurements of molar conductance, magnetic susceptibility, electronic and ir spectra.
Synthese und Struktur von Co(II)- und Ni(II)-Komplexen von Glutarsäure- und Adipinsäuredihydraziden
Zusammenfassung Glutarsäuredihydrazid (GDH) und Adipinsäuredihydrazid (ADH) bilden mit Co(II)-Chlorid und Ni(II)-Chlorid bzw.-Nitrat in ethanolischer Lösung Komplexe der generellen ZusammensetzungenMLCl2,ML 2Cl2 und [NiL(H2O)2] (NO3)2, mitM=Co(II), Ni(II) undL=GDH,ADH. Für 11-Komplexe von Co(II) wird eine tetragonale Geometrie, für alle anderen Komplexe eine oktaedrische Geometrie vorgeschlagen. Die Basis dazu lieferten Messungen der molaren Leitfähigkeit, der magnetischen Suszeptibilität und der UV- bzw. IR-Spektren.相似文献
8.
E. V. Lider E. V. Peresypkina L. G. Lavrenova L. A. Sheludyakova A. I. Smolentsev V. N. Ikorskii T. I. Yaroshenko V. N. Elokhina 《Russian Journal of Coordination Chemistry》2010,36(5):337-346
New Co(II), Ni(II), and Cu(II) complexes with 4-(3-hydroxyphenyl)-1,2,4-triazole (L) with the compositions [Co3L6(H2O)5(C2H5OH)](NO3)6 · 2H2O · C2H5OH (I), [Ni3L6(H2O)6](NO3)6 · 2H2O (II), and [M3L6(H2O)6](ClO4)6 · nH2O (M = Co2+, n = 2 (III); Ni2+, n = 2 (IV); Cu2+, n = 0 (V)) are synthesized. The complexes are studied by X-ray structure analysis, X-ray diffraction analysis, UV and IR spectroscopy,
and the statistical magnetic susceptibility method. All compounds have the linear trinuclear structure. Ligand L is coordinated
to the metal ions by the N(1) and N(2) atoms of the heterocycle according to the bidentate bridging mode. In all compounds
the coordination polyhedron of the metal atom is a distorted octahedron. The molecular and crystal structures of compound
I, [Co3L6(H2O)6](ClO4)6 · 8C2H5OH (IIIa), and [Ni3L6(H2O)6](ClO4)6 · 8C2H5OH (IVa) are determined. 相似文献
9.
Yu-Zhang TongQing-Lun Wang Meng SiJing Qi Shi-Ping YanGuang-Ming Yang Peng ChengDai-Zheng Liao 《Polyhedron》2011,30(18):3151-3157
Four new complexes [Ni3(μ-L)6(H2O)6](NO3)6·6H2O (1), [Co3(μ-L)6(H2O)6](NO3)6·6H2O (2), [Ni3(μ-L)6(H2O)4(CH3OH)2](NO3)6·4H2O (3), [Co3(μ-L)6(H2O)4(CH3OH)2](NO3)6·4H2O (4) (L = 4-amino-3,5-dimethanyl-1,2,4-triazole) were synthesized and structurally characterized by X-ray single-crystal diffraction. The structural analyses show that complex 1 and 2 are isomorphous; complex 3 and 4 are isomorphous. Four complexes all consist of the linear trinuclear cations ([M3(μ-L)6(H2O)6]6+ (M = Ni,Co) for 1 and 2; [M3(μ-L)6(H2O)4(CH3OH)2]6+ (M = Ni,Co) for 3 and 4), NO3− anions and crystallized water molecules. In the trinuclear cations, the central M(II) ions and two terminal M(II) ions are bridged by three triazole ligands. Other eleven solid solution compounds which are isomorphous with complex 3 and 4 were obtained by using different ratio of Ni(II) and Co(II) ions as reactants and ICP result indicates that ligand L has higher selectivity of Ni(II) ions than that of Co(II) ions. The magnetic analysis was carried out by using the isotropic spin Hamiltonian ? = −2J(?1?2 + ?2?3) (for complexes 1 and 3) and simultaneously considering the temperature dependent g factor (for complexes 2 and 4). Both the UV-Vis spectra and the magnetic properties of the solid solutions can be altered systematically by adjusting the Co(II)/Ni(II) ratio. 相似文献
10.
Four Co(II) complexes, [Co(HL)2](OAc)2, [Co(HL)2Cl2], [Co(HL)2(MeOH)2](NO3)2, and [Co2(HL)4(SO4)2] (HL = acetone-N(4)-phenylsemicarbazone) were synthesized and characterized by physicochemical and spectroscopic methods. The magnetic susceptibility
measurements indicate that the complexes are paramagnetic with three unpaired electrons. In all the complexes, the semicarbazone
is coordinated as a neutral bidentate ligand. The structure of [Co(HL)2(MeOH)2](NO3)2 was confirmed by single crystal X-ray crystallography. The ligand is neutral and bidentate, being coordinated to the cobalt
atom through the carbonyl oxygen and the azomethine nitrogen. Intermolecular hydrogen bonding and C–H···π interactions combine
to stabilize the crystal structure. The ligand and its two complexes [Co(HL)2Cl2] and [Co(HL)2(MeOH)2](NO3)2 were screened for their antibacterial and antifungal activities using disk diffusion methods. 相似文献
11.
Agnieszka Dziewulska-Kułaczkowska 《Journal of Thermal Analysis and Calorimetry》2010,101(3):1019-1026
The complexes Mn(II), Co(II), Ni(II) and Zn(II) with 4-oxo-4H-1-benzopyran-3-carboxaldehyde were synthesized and characterized
by elemental analysis, infrared and UV spectroscopy, X-ray diffraction patterns, magnetic susceptibility, thermal gravimetric
analysis, conductivity and also solubility measurements in water, methanol and DMF solution at 298 K. They are polycrystalline
compounds with various formula and different ratio of metal ion:ligand. Their formula are following: [MnL2(H2O)](NO3)2·2H2O, [CoL2](NO3)2·3H2O, [NiL2](NO3)2·3H2O, [CuL2](NO3)2·H2O and [ZnL3](NO3)2, where L = C10H6O3. The coordination of metal ions is through oxygen atoms present in 4-position of γ-pyrone ring and of aldehyde group of ligand.
Chelates of Mn(II), Co(II), Ni(II) and Cu(II) obey Curie–Weiss law and they are high-spin complexes with the weak ligand fields.
The thermal stability of analyzed complexes was studied in air at 293–1,173 K. On the basis of the thermoanalytical curves,
it appears that thermal stability of anhydrous analysed chelates changed following: Cu (423 K) < Zn (438 K) ~ Co (440 K) < Ni
(468 K). The gaseous products of thermal decomposition of those compounds in air atmosphere are following: CO2, CO, NO2, N2O, hydrocarbons and in case of hydrates also water. The molar conductance data confirm that the all studied complexes are
1:2 electrolytes in DMF solution. 相似文献
12.
The thermal decompositions of crystalline Co(II), Ni(II) and Zn(II) complexes with thiosalicylic acid or ethylenediamine were investigated via the respective thermal curves. On the basis of the decomposition temperatures, the following sequences of stabilities of the studied compounds have been proposed: 1. [Co(SR)][Ni(SR)]<[Zn(SR)]; 2. [Zn(en)2](NO3)2·2H2O<[Co(en)2](NO3)2<[Ni(en)3](NO3)2. 相似文献
13.
I. E. Uflyand A. G. Starikov V. S. Savost'yanov A. D. Pomogailo 《Russian Chemical Bulletin》1990,39(6):1185-1189
We have investigated the spatial and electronic structure of the complexes [Co(AAm)4(H2O)2](NO3)2 and Co(AAm)4Cl2 by electronic spectroscopy. The complex of cobalt nitrate with acrylamide (AAm) has a pseudooctahedral structure in the crystalline state and in organic solvents, and the metal-ligand bonds are covalent to a significant degree. For the complex of cobalt chloride with AAm, a change in the spatial structure is characteristic upon going from the crystal (tegragonally distorted octahedron) to the solution (tetrahedron). For a Co(AAm)4Cl2 single crystal, we determined the sequence of the energy levels with the ground-state4A2g-term. The high values of the McClure parameters, taking into account the contributions of the ligands to the and bonds, are evidence for coordination of the acrylamide through the oxygen atom.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1319–1323, June, 1990. 相似文献
14.
Selvaraj Kuppusamy Narasimhan Manjula Mallika Jaganathan 《Transition Metal Chemistry》2001,26(1-2):224-227
Ten cobalt(II) nitrate complexes with variously substituted 2,6-diphenylpiperidin-4-ones (L1)–(L10) have been prepared and characterized by elemental analysis, molecular weight determination, molar conductance and magnetic, thermal, polarographic and spectral studies. The formula [Co(L)2(H2O)4](NO3)2 has been assigned to complexes (2–5), (7), (8) and (10) and [Co(L)2(H2O)2(NO3)]NO3 to complexes (1), (6) and (9). Although piperidin-4-ones have two coordinating sites, namely the ring nitrogen and the carbonyl group, i.r., and polarographic studies indicate that only the ring nitrogen is involved in coordination. Electronic spectral data reveal that these complexes have octahedral geometry. 相似文献
15.
Shuangxi Wang Shuyan Yu Qinhui Luo Qiuying Wang Jianqui Shi Qiangjin Wu 《Transition Metal Chemistry》1994,19(2):205-208
Summary The complexes Co(BBP)Cl2, Co(BBP)2SO4·H2O, Co(BBP)2(NO3)2·H2O, Co(BBP)2(ClO4)2 and Co(BBP−H)2· 2H2O, where BBP is 2,6-bis(benzimidazol-2′-yl) pyridine, were prepared and characterized by elemental analysis, electrical conductance, i.r. and electronic
spectra. The electrochemical behaviour of the complexes was recorded and the X-ray crystal structure of Co(BBP)Cl2(MeOH)2 was determined. The geometry about cobalt is a distorted octahedron. 相似文献
16.
O. G. Shakirova L. G. Lavrenova N. V. Kuratieva D. Yu. Naumov A. S. Bogomyakov L. A. Sheludyakova T. F. Mikhailovskaya S. F. Vasilevsky 《Russian Journal of Coordination Chemistry》2012,38(8):552-559
New cobalt(II), nickel(II), and copper(II) complexes based on 5-methoxycarbonyl-3-me-thylpyrazole (MePzCOOMe), [Co(MePzCOOMe)2(H2O)2](NO3)2 (I), [Ni(MePzCOOMe)2(H2O)2] (NO3)2 (II), and [Cu(MePzCOO)2(H2O)] · 3H2O (III), were synthesized. The compounds were studied by X-ray diffraction analysis, IR spectroscopy, and static magnetic susceptibility. The molecular and crystal structures of complexes I and III were determined by X-ray structure analysis. 相似文献
17.
《Journal of Coordination Chemistry》2012,65(7):1067-1075
Three new mononuclear complexes [Co(2-Acpy)2(H2O)2](NO3)2 (1), [Ni(2-Acpy)2(H2O)2](NO3)2 (2) and [Cd(2-Acpy)2(NO3)2] (3) (2-Acpy = 2-acetylpyridine) have been synthesized and characterized by elemental analysis, IR and UV–Vis spectroscopy. The structures of 1 and 3 were accomplished by single crystal X-ray diffraction. Crystallographic investigation of 1 reveals monomeric, dicationic units in which the cobalt(II) ion is six-coordinate. The coordination sphere is formed by two N, O bidentate acetylpyridine ligands and two water molecules. The crystal structure of 3 consists of monomeric units in which the cadmium is eight-coordinate. Both the organic ligand and nitrate groups are bidentate chelators. The supramolecular solid-state architecture is sustained by π–π interactions. 相似文献
18.
《Journal of Coordination Chemistry》2012,65(9):953-959
Hydrothermal treatments of ciprofloxacin with Ni(NO3)2·6H2O and Mn(ClO4)2·6H2O yield two metal complexes: [Ni(H-cip)2(H2O)2](NO3)2·2H2O (1) and [Mn(H-cip)2(H2O)2] (ClO4)2·2H2O (2), confirmed by elemental analysis, IR and single crystal X-ray diffraction analyses. Complexes 1 and 2 were screened for antibacterial activity against Staphylococcus aureas, E. coli, Pseudomonas aeruginos and Candidaalbicans. 相似文献
19.
Furong Xiao Lu Chen Jide Wang Ronglan Wu Fan Yue Jing Li 《Frontiers of Chemistry in China》2007,2(2):169-173
Three new cobalt complexes were synthesized by solid-state reaction at room temperature and the resultant Co complexes reacted
with two equivalent oxygen molecules at room temperature to produce the oxygenated complexes [Co·(L1)2·(O2)2](NO3)2·2H2O (L1 = N, N’-bis(4-hydroxyl-3-methoxy-benzyl)-diethylenetriamine), [Co·(L2)2·(O2)2](NO3)2·2H2O (L2 = N, N’-bis(4-hydroxyl-3-methoxy-benzyl)-triethylenetetramine), and [Co·(L3)2·(O2)2](NO3)2·2H2O (L3 = N, N’-bis(4-hydroxyl-3-methoxy-benzyl-tetraethylenepentamine). The oxygenated complexes were characterized by elemental
analysis, IR (Infrared), 1H-NMR (Nuclear Magnetic Resonance), and UV-Vis (Ultraviolet Visual) spectrometry, and TG/DTA (Thermogravimetry/Differential
Thermal Analysis) analysis, and molar conductance. The coordinated oxygen contents in the oxygenated complexes were also determined
by weight method. It was supposed that only one O2 molecule coordinated to the Co ion forming a superoxo type oxygenated complex.
Translated from Acta Chimica Sinica, 2006, 64(15): 1517–1522 (in Chinese) 相似文献
20.
Ma del Carmen Fernández-Fernández Alejandro Macías Laura Valencia 《Journal of organometallic chemistry》2009,694(22):3608-3613
The coordination capability of the new tetrapyridyl pendant-armed azamacrocyclic ligand L, towards Co(II), Ni(II), Cu(II) and Cd(II) ions was studied. The ligand and the complexes were characterized by microanalysis, LSI mass spectrometry, IR, UV-Vis and NMR spectroscopy, magnetic studies and conductivity measurements. Crystal structures of [Co2L(CH3CN)2](ClO4)4·2CH3CN and [Cd2L(NO3)2](NO3)2·2H2O complexes have been determined. The X-ray studies show the presence of dinuclear endomacrocyclic complexes with the metal ion in a similar distorted octahedral environment, coordinated by one pyridyl bridgehead group, two amine nitrogen atoms and two pyridyl pendant-arms. The sixth coordination position around the metal ion is completed by one acetonitrile molecule in [Co2L(CH3CN)2](ClO4)4·2CH3CN and by one monodentate nitrate anion in [Cd2L(NO3)2](NO3)2·2H2O. Different sort of intramolecular non-classical hydrogen bonds were found in the crystal lattice of both structures. 相似文献