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1.
Jin-Zhong Gu Dong-Yu Lv Zhu-Qing Gao Jian-Zhao Liu Wei Dou 《Transition Metal Chemistry》2011,36(1):53-58
Three Co(II) and Ni(II) complexes, namely [Co(bpdc)(H2O)2] (1), [Ni(bpdc)(H2O)2] (2), and [Co2(bpdc)2(prz)0.5(H2O)3]·0.5H2O (3) (H2bpdc = 2,2′-bipyridine-6,6′-dicarboxylic acid and prz = piperazine), have been synthesized from H2bpdc and the corresponding metal salts under hydrothermal conditions. The complexes were characterized by physico-chemical
and spectroscopic methods, as well as by X-ray crystallography. Compounds 1 and 2 both consist of neutral mononuclear molecules, of [Co(bpdc)(H2O)2] and [Ni(bpdc)(H2O)2], respectively. Compound 3 consists of a mononuclear molecule of [Co(bpdc)(H2O)2] and a binuclear molecule of [Co2(bpdc)2prz (H2O)2]. The discrete neutral complexes 1–3 further extend their structures into three-dimensional supramolecular architectures by intermolecular O–H⋯O and C–H⋯O hydrogen
bonds as well as π–π stacking interactions. Magnetic susceptibility measurements show that complex 3 exhibits weak ferromagnetic interactions between the two Co(II) ions bridged by the prz ligand, with C = 5.41 cm3 mol−1 K and θ = +27.6 K, respectively. 相似文献
2.
Danuta Czakis-Sulikowska Joanna Radwańska-Doczekalska Bożena Kuźnik Anna Malinowska 《Transition Metal Chemistry》1995,20(2):203-207
Summary Complexes of empirical formulae [ML2Cl2(OH2)2], [CoL2Br2(OH2)2]L·4H2O, [NiL2Br2(OH2)2]L2·2H2O, [ML2(OH2)4]L2(NO3)2 and [ML4(OH2)2](ClO4)2·2H2O (M = CoII, NiII, L = 2,4-bipyridyl) were synthesized and characterized by elemental and spectral analyses. The thermal decomposition of the complexes was also investigated.Author to whom all correspondence should be directed. 相似文献
3.
Summary New potential tetradentate ligands, N-benzoyl-N-thiobenzohydrazide (H2BTBH) and N-salicyl-N-thiobenzohydrazide (H2SBTH) have been prepared and characterized. Their complexes with CoII, NiII and ZnII have been prepared and characterized on the basis of elemental analyses, magnetic susceptibility measurements, and u.v.-vis., i.r. and 1H-n.m.r. spectral studies. The bonding and stereochemistries of the complexes are discussed. H2BTBH, H2SBTH and the complexes have been screened towards a number of bacteria. 相似文献
4.
Reaction of 6,6′dideoxy-6,6′di-iodo-1′,2,3,3′,4,4′-hexa-O-benzylsucrose with triethyl phosphite afforded the corresponding 6,6′-diphosphonate. Selective phosphonylation either at the C-6 or 6-6′ position was also possible providing the corresponding sucrose mono-phosphonates. Reaction of 6,6′-dichloro-hexa-O-benzylsucrose with diphenylphoshine anion afforded the 6,6′-diphosphinosucrose. 相似文献
5.
《Journal of Coordination Chemistry》2012,65(23):4144-4162
Reactions of anhydrous CoX2 (X?=?Br?, SCN?) and Ni(ClO4)2 with N,N,N′,N′-tetraisobutylpyridine-2,6-dithiocarboxamides (S-dbpt), N,N,N′,N′-tetraisopropyl pyridine-2,6-dithiocarboxamides (S-dppt), and N,N,N′,N′-tetraethylpyridine-2,6-dithiocarboxamides (S-dept) lead to the formation of [Co(S-dbpt)Br2] (1), [Co(S-dppt)(SCN)2] (2), and [Ni(S-dept)2]·(ClO4)2·H2O (3), respectively. The X-ray crystal structures of the three S-dapt ligands and three complexes along with spectroscopic analyzes are presented. The molecular structure investigations of the S-dapt ligands show that the thiamide planes are twisted with respect to the pyridine ring, which is more in the case of phenyl groups. The structures of the Co(II) complexes reveal that an increase in steric crowding on the amide side arms of the ligands has no substantial effect on the geometry adopted by the corresponding complexes. The Co(II) gives only 1?:?1 five-coordinate, ion-paired complexes with a distorted square pyramidal geometry. Ni(II), on the other hand, prefers an octahedral geometry with 1?:?2 metal–ligand ratio. The coordination behavior of S-dapt has been compared to the analogous oxo(O-daap) ligands. Lesser propensity of S atom to get involved in H-bonding interactions ensures an S-N-S type of tridentate coordination by S-dapt. 相似文献
6.
J. Radwańska-Doczekalska D. Czakis-Sulikowska M. Markiewicz 《Journal of Thermal Analysis and Calorimetry》1997,48(4):865-875
2,4-Bipyridyl (2,4-bipy orL) complexes with cobalt(II), nickel(II) and copper(II) of the formulae M(2,4-bipy)2(CH3COO)2·2H2O (M(II) = Co, Ni, Cu), Co(2,4-bipy)2SO4·3H2O or Ni(2,4-bipy)2SO4·4H2O have been prepared and their IR and electronic (VIS) spectra are discussed. The thermal behaviour of the obtained compounds has also been studied. The intermediate products of decomposition at different temperatures have been characterized by chemical analysis and X-ray diffraction.We thank dr. A. Malinowska for performing VIS spectra. This work was supported by the KBN project No. PB 0636/P3/93/04. 相似文献
7.
8.
S. V. Kochnev E. V. Peresypkina A. V. Virovets T. G. Cherkasova 《Russian Journal of Inorganic Chemistry》2012,57(8):1067-1072
The possibility of ?-caprolactam (CPL) to coordinate to manganese(II), cobalt(II), and nickel(II) rhodanides has been investigated. New complexes trans-[M(CPL)4(NCS)2], where M = Mn (I), Co (II), and Ni (III), have been synthesized. The complexes have been studied by chemical analysis and IR spectroscopy. According to X-ray diffraction, complexes are isostructural to each other and crystallize in monoclinic space group P21/c, Z = 2. For I: a = 6.9457(2) ?, b = 17.7751(6) 0A, c = 12.8999(4) 0A, ?? = 104.2670(10)°, V = 1543.51(8) ?3, ??calc = 1.342 g/cm3, R 1 = 0.0426. For II: a = 6.8925(2) ?, b = 17.8189(8) ?, c = 12.7278(6) ?, ?? = 104.421(2)°, V = 1513.93(11) ?3, ??calc = 1.377 g/cm3, R 1 = 0.0280. For III: a = 6.7804(2) ?, b = 18.4631(4) ?, c = 12.4841(3) ?, ?? = 105.2950(10)°, V = 1507.49(7) ?3, ??calc = 1.382 g/cm3, R 1 = 0.0273. Structures I?CIII are molecular; the metal atom in each of them coordinates four CPL molecules and two NCS groups via oxygen and nitrogen atoms, respectively. 相似文献
9.
JIANG Zong-Hu DENG Chao-Li LIAO Dai-ZhengYAN Shi-Ping WANG Geng-Lin Department of Chemistry Nankai University Tianjin China 《中国化学》1994,12(3):231-236
Four binuclear Co(Ⅱ), Ni(Ⅱ) and Cu(Ⅱ) complexes bridged by oxamidate (oxd) group have been synthesized, namely Co2(byp)2(oxd)(ClO4)2 (1), Co2(Me2bpy)2(oxd)(ClO4)2.H2O (2), Ni2(bpy)2(oxd)(ClO4)2.2H2O (3) and Cu2(Me2bpy)2(oxd)(NO3)2 (4). (bpy=2,2'-bipyridyl, Me2-bpy=4,4'-dimethylbipyridyl, oxd=oxamidate) The complexes are characterized by IR, UV spectra, EPR and variable-temperature magnetic susceptibility (4-300 K). The susceptibility data for. complexes 1 and 3 were least-squares fit to the susceptibility equation derived from the spin Hamiltonian H=-2J . S1 . S2. The exchange integral, J, was found to be equal to -3.62 cm-1 in 1 and -1.82 cm-1 in 3. This indicates a weak antiferromagnetic spin exchange interaction between the metal ions. 相似文献
10.
4,4-Bis(chloroacetyl)diphenylmethane has been prepared from ClCH2COCl and Ph2CH2. 4,4-Methylenebis(phenylglyoxylohydroximoyl chloride has also been obtained. Four new substituted 4,4-bis(alkylaminoisonitrosoacetyl)diphenylmethanes (ligands) have been prepared from 4,4-methylenebis(phenylglyoxylohydroximoyl chloride) and the corresponding amines. The NiII, CuII and CoII complexes of these ligands were prepared and their structures were identified using AAS, i.r., 1H-n.m.r. spectral data, elemental analyses and magnetic susceptibility measurements. 相似文献
11.
L. A. Antina N. A. Dudin M. B. Berezin G. B. Guseva E. V. Antina 《Russian Journal of General Chemistry》2011,81(3):591-593
The influence of the nature of the complexing metal on the optical properties of coordination compounds of bis(dipyrrolilmethenes) was studied. 相似文献
12.
The crystal structure of Ni(Ⅱ) complex with 3-hydroxyl-1, 5-diazacycloheptane-N, N'-diacetate was determined by X-ray diffraction method. Crystal data for Ni2 (C9H14N2O5)2·2H2O: monoclinic, space group P21/n, a = 1.1717(5), b = 0.9794(3), c = 1.2971(2) nm, β= 96.62(3), V= 1.4786(7) nm3, Dc = 1.377 g/cm3, Z = 2,μ=13.321 cm-1 (Mo-Kα), F(000)=640. The final R and Rw are 0.075 and 0.089 respectively. The Ni(Ⅱ) ion forms 2:2 complex with ligand. Two ligands are bridged by two Ni(Ⅱ) atoms which are bridged by two O atoms. Every Ni(Ⅱ) is coordinated by two N atoms and four 0 atoms. The coordination polyhedron of the Ni(Ⅱ) ion is a distorted octahedron. 相似文献
13.
Transition Metal Chemistry - The Fe(III) complex [FeIII(bpdc)(Hbpdc)] (1) (bpdc?=?2,2′-bipyridyl-6,6′-dicarboxylate and... 相似文献
14.
5,5′-Dialkyl-6,6′-dichloro-2,2′-bipyridines were synthesized starting from 3-substituted 2-chloro-6-iodopyridines using Pd-catalyzed coupling conditions. 6-Alkyl-3,5-dichloro-2H-1,4-oxazin-2-ones were excellent precursors for the synthesis of these functionalized 2-iodo-6-chloropyridines. 相似文献
15.
《Journal of Coordination Chemistry》2012,65(15):2631-2638
The adducts of bis(O,O′-dialkylmonoselenophosphato)cobalt(II) complexes, Co{O(Se)P(OR)2}2(L)4 (where R?=?n-Pr, i-Pr; L?=?C5H5N, NC5H4Me-2, NC5H4Me-3), were synthesized by in situ reactions of CoCl2?·?6H2O, Lewis base, and NaO(Se)P(OR)2. The single crystal structure of Co{O(Se)P(OiPr)2}2(C5H5N)4 shows distorted octahedral geometry around cobalt(II) and monoselenophosphates are trans. The CoN4 forms a square plane. These bis(O,O′-dialkylmonoselenophosphato)cobalt(II) adducts were characterized by elemental analyses, spectroscopic techniques (UV-Vis, infrared, 1H and 31P), and magnetic moment measurements. 相似文献
16.
Chizhova N. V. Konakova A. V. Mal’tseva O. V. Mamardashvili N. Zh. Koifman O. I. 《Russian Journal of Organic Chemistry》2017,53(7):1094-1098
Russian Journal of Organic Chemistry - Bromination of (5,10,15,20-tetraphenylporphyrinato)nickel(II) with N-bromosuccinimide in chloroform and chloroform–dimethylformamide mixture and... 相似文献
17.
《Journal of Coordination Chemistry》2012,65(14):2455-2464
Two transition metal complexes, [Cu2(bpdc)2H2O]·2H2O (1) and Zn(bpdc)(H2O)2 (2) (H2bpdc?=?2,2′-bipyridine-6,6′-dicarboxylic acid), were synthesized and characterized by elemental analysis, IR spectroscopy, and single-crystal X-ray diffraction. Complex 1 is dinuclear with two five-coordinate cupric ions and 2 is mononuclear with one six-coordinate zinc. Interactions of 1 and 2 with DNA have been investigated using UV–Vis absorption spectra. The cleavage reaction on DNA has been monitored by agarose gel electrophoresis. 相似文献
18.
TIAN Yan-Ni YANG PinInstitute of Coordination Chemistry The State Key Laboratory of Coordination Chemistry Nanjing University Nanjing Jiangsu ChinaLI Qing-Shan ZHAO Chun-GuiInstitute of Molecular Science Shanxi University Taiyuan Shanxi China 《中国化学》1996,14(5):428-436
New complexes,of bis(2,2'-diamino-4,4'-bithiazole)sulfate nickel(Ⅱ) and bis(2,2'-diami-no-4,4'-bithiazole)sulfate cobalt(Ⅱ),have been prepared.The complexes were characterized by infrared and UV-Vis spectroscopy,1H NMR,elemental analyses and molar conductivity.The effect of these complexes on the DNA synthesis of sarcoma 180 cells has been studied by the technique of isotopic liquid scintillation.The results indicated that complexes show ability to inhibit DNA synthesis of the tumor cells.In order to provide a molecular basis for understanding the biological effects,the probe,[trana-en2Os(η2-H2)](CF3SO3)2 (en,ethylenediamine) as a monitor was first used to explore interaction of the complexes with 2'-deoxyguanosine-5'-monophosphate (dGMP). 相似文献
19.
E. A. Chalaya A. G. Tyurin M. V. Vasekha A. I. Biryukov 《Russian Journal of General Chemistry》2016,86(7):1545-1551
Pourbaix diagrams of Cu–H2SO4–H2O and Ni–H2SO4–H2O systems have been refined, and stability regions of the sulfite phases have been determined. State diagrams of double copper(I)–copper(II) and copper(I)–nickel(II) sulfites have been constructed. Double copper(I)–nickel(II) sulfite has been isolated from aqueous solutions saturated with sulfur dioxide. The solutions at different ratios of the metals have been studied by spectrophotometry; the isolated double sulfite has been studied by X-ray diffraction, IR spectroscopy, dispersion analysis, and thermal analysis. Fundamentals of thermodynamic prognostication of the Cu2SO3·MSO3 double sulfites synthesis have been elaborated. 相似文献
20.
《Polyhedron》1999,18(20):2633-2640
Simple syntheses of the potentially tetradentate chelating ligands 6,6′-bis(3-pyrazolyl)-2,2′-bipyridine (H2L1), and 6,6′-bis(2-hydroxyphenyl)-2,2′-bipyridine (H2L2) are described: H2L1 is a new ligand, whereas H2L2 is known, but investigation of its coordination chemistry has been hampered by the lack of a simple synthesis. Complexes of both have been structurally characterised and reveal many interesting features. [Cu(HL1)(H2O)][PF6] is square pyramidal with an axial H2O ligand, but, in the solid state, forms a hydrogen-bonded dimer in which the peripheral pyrazolyl groups of HL1 (one protonated, one deprotonated) in one complex unit form a two-point ‘chelating’ hydrogen-bonding interaction with the axial water ligand of the second, and vice versa. In contrast, [Ag2(L1)2][BF4]2 is a dinuclear double helicate because of the preference of Ag(I) ions for a pseudo-tetrahedral geometry. [Cu(L2)] has a typical near-planar geometry with a N2O2 donor set, and monomeric units are associated into centrosymmetric dimers in the crystal via weak axial Cu⋯O(phenolate) interactions to give an asymmetric [Cu2(μ-phenolate)2] core. In {[Cu(L2)]2H}(PF6), the two monomeric [Cu(L2)] units are also associated via axial phenolate interactions to give a dimer with a [Cu2(μ-phenolate)2] core, but, in addition, the extra proton per dimer unit is located at the centre of a short, strong O⋯H⋯O hydrogen-bond that links a phenolate group from each of the two monomer units. The geometry of dimer formation is changed in order to allow the phenolate groups to approach one another closely enough for this hydrogen-bond to form. 相似文献