A NOVEL TETRANUCLEAR NICKEL(II) SALAMO-BASED COMPLEX ADOPTING TWO OPEN CUBIC STRUCTURES: SYNTHESIS,CHRACTERIZATION, DFT CALCULATION,HIRSHFELD ANALYSIS,AND FLUORESCENT PROPERTIES

Journal of Structural Chemistry - A novel tetranuclear Ni(II) complex [Ni4(L)2(N3)4Cl(MeOH)3]·CH3COCH3 is synthesized via a symmetrical salamo-based ligand H2L, NiCl2·6H2O, and NaN3. The...     

Nickel(II) and cobalt(II) complexes with 4,5-dichloro-isothiazole-3-carboxylic acid and 1,10-phenanthroline: synthesis,crystal structures and cytotoxicity

Transition Metal Chemistry - In this study, Ni(II) and Co(II) complexes [Co(H2O)2L2] (1), [Ni(H2O)2L2] (2), [Co(phen)L2] (3), [Ni(phen)L2]·2H2O·EtOH (4·2H2O), and...     

Insight into new mono- and tri-nuclear nickel(II)-based complexes supported by structural variation of salamo-like ligands

Transition Metal Chemistry - New mono- and tri-nuclear Ni(II)-based complexes, [Ni(L1)2] (1) and [{Ni(L2)(DMF)(μ-OAc)}2Ni]·2EtOH·2CH2Cl2 (2), supported by half-salamo- and...     

STRUCTURE OF COMPOUNDS DERIVED FROM [Au(Dien)Cl]Cl2 AND PLATINUM CHLORIDE COMPLEXES

Journal of Structural Chemistry - Double complex salts [Au(Dien)Cl][PtCl4]·H2O (1) and [Au2(Dien*)Cl4]2[PtCl6]·2H2O (2), where Dien* is diethylenetriamine with a deprotonated imino group,...     

Molecular Magnets Based on Mononuclear Aqua and Aqua-Chloro Lanthanide (Tb,Dy, Er,Yb) Complexes with Bipyridine

Russian Journal of Coordination Chemistry - The complexes [Tb(Bipy)2(H2O)2Cl2]Cl (I), [Ln(Bipy)(H2O)6]Cl3·2H2O·0.5Bipy (Ln = Dy (II), Yb (IV)), [Er(Bipy)2(H2O)3Cl]Cl2·2H2O (III), and...     

Syntheses, crystal structures and properties of two nickel(II) coordination polymers constructed from 5-(isonicotinamido)isophthalic acid

Two Ni(II) metal–organic frameworks, [Ni(INAIP)(DMF)]·0.5DMF and [Ni(INAIP)(H₂O)]·2H₂O, have been synthesized by the reaction of 5-(isonicotinamido)isophthalic acid (H₂INAIP) with NiSO₄·6H₂O using different reaction solvents. Single-crystal X-ray diffraction analysis indicates that [Ni(INAIP)(DMF)]·0.5DMF has a twofold interpenetrated three-dimensional (3D) framework with sra topology, while [Ni(INAIP)(H₂O)]·2H₂O has a two-dimensional (2D) network structure with a 4-connected (4³·6³) topology. In addition, the magnetic and adsorption properties of the complexes were explored.     

Synthesis,Crystal Structures,and Catalytic Oxidation of Olefins of Novel Oxomolybdenum(VI) Clusters

Russian Journal of Coordination Chemistry - Two Mo(VI) clusters, (H2L)3[Mo7O12(μ2-O)8(μ3-O)4] · 3H2O (I) and (H2L)2[Mo8O14(μ2-O)6(μ3-O)4(μ5-O)2] · 4DMF (II),...     

Synthesis,crystal structure and properties of di-μ2-alkoxo bridged binuclear manganese(III) Schiff base complexes

Transition Metal Chemistry - Preparation and isolation of the dimeric manganese(III) complex, [Mn2(Salpa)2(H2O)2Cl2] · 2DMF, (1), was accomplished by air oxidation of a solution containing...     

Synthesis and crystal structures of four three-dimensional hybrid materials based on polyoxovanadate bridging macrocyclic copper/nickel complexes

Transition Metal Chemistry - In this research, four hybrid materials, namely [Ni(MC)]3[VO3]6·12.25H2O (1), [Cu(MC)]3[VO3]6 (2), [Ni(PC)]3[VO3]6·2H2O (3), and [Cu(PC)]3[VO3]6·2H2O (4)...     

Synthetic analogues of the active site of the A-cluster of acetyl coenzyme A synthase/CO dehydrogenase: syntheses, structures, and reactions with CO

Two metallosynthons, namely (Et4N)2[Ni(NpPepS)] (1) and (Et4N)2[Ni(PhPepS)] (2) containing carboxamido-N and thiolato-S as donors have been used to model the bimetallic M(p)-Ni(d) subsite of the A-cluster of the enzyme acetyl coenzyme A synthase/CO dehydrogenase. A series of sulfur-bridged Ni/Cu dinuclear and trinuclear complexes (3-10) have been synthesized to explore their redox properties and affinity of the metal centers toward CO. The structures of (Et4N)2[Ni(PhPepS)] (2), (Et4N)[Cu(neo)Ni(NpPepS)] x 0.5 Et2O x 0.5 H2O (3 x 0.5 Et2O x 0.5 H2O), (Et4N)[Cu(neo)Ni(PhPepS)] x H2O (4 x H2O), (Et4N)2[Ni{Ni(NpPepS)}2] x DMF (5 x DMF), (Et4N)2[Ni(DMF)2{Ni(NpPepS)}2] x 3 DMF (6 x 3 DMF), (Et4N)2[Ni(DMF)2{Ni(PhPepS)}2] (8), and [Ni(dppe)Ni(PhPepS)] x CH2Cl2 (10 x CH2Cl2) have been determined by crystallography. The Ni(d) mimics 1 and 2 resist reduction and exhibit no affinity toward CO. In contrast, the sulfur-bridged Ni center (designated Ni(C)) in the trinuclear models 5-8 are amenable to reduction and binds CO in the Ni(I) state. Also, the sulfur-bridged Ni(C) center can be removed from the trimers (5-8) by treatment with 1,10-phenanthroline much like the "labile Ni" from the enzyme. The dinuclear Ni-Ni models 9 and 10 resemble the Ni(p)-Ni(d) subsite of the A-cluster more closely, and only the modeled Ni(p) site of the dimers can be reduced. The Ni(I)-Ni(II) species display EPR spectra typical of a Ni(I) center in distorted trigonal bipyramidal and distorted tetrahedral geometries for 9(red) and 10(red), respectively. Both species bind CO, and the CO-adducts 9(red)-CO and 10(red)-CO display strong nu(co) at 2044 and 1997 cm(-1), respectively. The reduction of 10 is reversible. The CO-affinity of 10 in the reduced state and the nu(co) value of 10(red)-CO closely resemble the CO-bound reduced A-cluster (nu(co) = 1996 cm(-1)).     

Application of differential scanning calorimetry to freeze-dried milk and milk fractions

Journal of Thermal Analysis and Calorimetry - Four ionic cobalt hexacyanidoferrate(II) complexes with formulae [Co(NH3)6]4[Fe(CN)6]3·12H2O (1) [Co(NH3)6]2Cl2[Fe(CN)6]·4H2O (2),...     

Synthesis and structure of manganese(ii) coordination polymers with 1,4-diazabicyclo[2.2.2]octane N,N′-dioxide: solvent and template effects

Russian Chemical Bulletin - New metal-organic frameworks [Mn(DMF)2(odabco)2](ClO4)2 · H2O (1), [Mn(H2O)2? (HCOO)2] · odabco (2), and [Mn(Hodabco)2(odabco)3](NO3)4 (3) were...     

Two solvent directed zinc(II) coordination polymers with 1-D single-zigzag chain and 1-D double-zigzag chains

Two coordination polymers, {[Zn(NiL)(DMA)(H₂O)₂] (DMA)(H₂O)} _n (1) (DMA?=?N,N-dimethylacetamide) and {[Zn₂(NiL)₂(DMF)(H₂O)₄]?·?3DMF} _n (2) (DMF?=?N,N-dimethylformamide), have been prepared by reactions of Zn(NO₃)₂?·?6H₂O and NiL in CH₂Cl₂-DMA–H₂O and CH₂Cl₂-DMF–H₂O, respectively. H₂L denotes dimethyl 5,6,7,8,15,16-hexahydro-6,7-dioxodibenzo-9,10-benzo-[1,4,8,11]tetraazacyclotetradecine-13,18-dicarboxylate. Single-crystal X-ray diffraction analyses reveal that coordination geometries around Ni(II) are identical with slightly distorted square planar and all Ni–N bonds are very short. Complex 1 shows 1-D zigzag chain structure, while 2 has 1-D double-zigzag chains. The chains, which are packed parallel in 1 and 2, are interconnected by lattice solvent through O–H···O and C–H···O hydrogen bonds to form 3-D supramolecular networks. We discuss solvent effects on assembly of the two coordination polymers. The results reveal that coordinated solvent has influence on the assembly procedure.     

Synthesis, Structure, and Magnetic Properties of One Polyoxometalate (W/Mo) Compound: H_8K{[Ni(H_2O)_5]_2(H_2Mo_(1.80)W_(10.20)O_(42))}Cl_3·16H_2O

One new polyoxometalate compound connected via nickel/potassium cations, H8K{[Ni(H2O)5]2(H2Mo1.80W10.20O42)}Cl3·16H2O 1, was prepared and characterized by elemental analysis and IR spectroscopy. Single-crystal X-ray diffraction analysis results reveal that clusters of [Ni(H2O)5]2(H2Mo1.80W10.20O42)}6-in compound 1 are linked by potassium cations to form one- dimiensional chains, based on which a three-dimensional network is further constructed via the hydrogen bonds of O…O and O…Cl. Magnetic measurements show that compound 1 has para- magnetic properties. Crystal data: H62Cl3KMo1.80Ni2O68W10.20, Mr = 3461.33, monoclinic, space group C2/c, a = 18.9291(19), b = 16.6758(17), c = 19.1064(19), β = 106.6880(10)°, V = 5777.1(10)3, Z = 4, Dc = 3.980 g/cm3, F(000) = 6250, μ = 21.574 mm?1, R = 0.0579 and wR = 0.1623 (I > 2σ(I)).     

Treatment activity of 0D/2D coordination complexes on gastric carcinoma by inhibiting the cancer cell viability

In the present study, via reaction of Ni(NO₃)₂·6H₂O with two flexible dicarboxylic ligands under the solvothermal reaction conditions, two new Ni(II)-containing coordination complexes with the chemical formulae of [Ni4(L1)₄(DMF)₄·2DMF]_n (1) and [Ni(L2)(DMF)]_n (2) (H2L1= 2,2'-(1,4-phenylenebis(methylene))bis(sulfanediyl)dinicotinic acid and H2L2 ?= ?2,2'-(1,2-phenylenebis(methylene))bis(sulfanediyl)dinicotinic acid) have been prepared. For the treatment of the gastric carcinoma, the Cell Counting Kit-8 kit was carried out for the detection of the gastric carcinoma cells viability after compound treatment. Additionally, the Annexin V-FITC/PI apoptosis assay was also conducted and the apoptosis levels of the gastric carcinoma cells were determined after compound exposure.     

含大环配体tacn的Co、Ni双金属配合物[Ni(tacn)_2]_2·[Co(dmg)_2Cl_2]_4·4H_2O的合成及晶体结构

标题化合物[Ni（tacn）2]2·[Co（dmg）2Cl2]4·4H2O（C56H112Cl8Co4N28Ni2O20）是由NiCl2·6H2O、CoCl2·6H2O、tacn·3HCl和dmg（丁二酮肟）在甲醇溶液中反应而得。结构通过经石墨单色器单色化的MoKα射线（λ=0.71073A）衍射法测定,共收集到16173个衍射点,其中独立衍射点14816个。解析结果表明,晶体属于三斜晶系,空间群为P1,晶胞参数为a=14.771（4）,b=18.297（5）,c=19.214（5）A,α=118.035（4）,β=97.545（5）,γ=91.273（5）°,V=4523（2）A3,Z=2。Mr=2102.48,Dc=1.544g/cm3,μ（MoKα）=1.435mm-1,F（000）=2176。晶体用直接法解出,经过最小二乘法对原子参数进行修正,最终的偏离因子为R=0.0884,wR=0.2239。分子中[Ni（tacn）2]2+阳离子和[Co（dmg）2Cl2]-阴离子间是通过静电才互作用结合在一起的。     

Synthesis, Crystal Structure and Properties of a Novel Tetranuclear Nickel（II） Complex with Azo-enolic-2-hydroxybenzamide

A novel tetranuclear nickel(Ⅱ) complex [Ni4L2(DMF)2(H2O)2·2DMF] (1,H4L=azo-enolic-2-hydroxybenzamide, DMF=N,N-dimethyl-formamide) has been synthesized and characterized by elemental analysis, UV, IR and X-ray single-crystal diffraction characterization. Complex 1 crystallizes in the monoclinic system, space group P21/n with a=8.8944(11), b=14.4583(18), c=18.097(2) , β=90.00(2)o, Z=2 , V=2327.2(5)3 , C40H48N12Ni4O14 , Mr=1155.66, Dc=1.649g/cm 3 , μ=1.672 mm-1 , F(000)=1192, R=0.0392 and wR=0.0958. The local coordination environment around the nickel ions exist a distorted octahedral and quadrangle geometry in the molecular structure. Complex 1 exhibits strong photoluminescent emission in the ultraviolet region at room temperature. The electrochemical studies reveal that redox of Ni 3+ /Ni 2+ in the complex is a quasi-reversible process.     

Hydrogen bonded networks based on Ni(II)-tetraazamacrocycle (tet-b) complexes: synthesis,isolation and structural characterization of α -[Ni(tet-b)(Cl)](ClO4) and α -[Ni(tet-b)(en)](ClO4)2

Five- and six-coordinate, α-[Ni(tet-b)(Cl)](ClO₄) (1) and α-[Ni(tet-b)(en)](ClO₄)₂ (2) (tet-b?= C-racemic-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane) complexes have been synthesized and isolated from the reactions of α-[Ni(tet-b)](ClO₄)₂, which has trans-V (1R,4R,8R,11R,7S,14S or 1S,4S,8S,11S,7R,14R) conformation, with t-Bu₄NCl and ethylenediamine (en), respectively. The complexes have been characterized by X-ray crystallography. The crystal structure of 1 shows a distorted trigonal bipyramidal (TBP) coordination geometry composed of four nitrogen atoms from tet-b and a chloro group with an N₄Cl chromophore about the nickel(II) ion. The complex cations of 1 are assembled by the perchlorate ions via N–H?···?O hydrogen bonding to form 1-D zigzag chains along the [001] direction. The chains are linked through intermolecular hydrogen bonding where the coordinated chloro group of the complex cation forms two-center double hydrogen bonds with the adjacent N–H groups of the macrocyclic ligand along the [100] direction, resulting in a two-dimensional α-network. The crystal structure of 2 shows a distorted octahedral coordination environment consisting of four nitrogen atoms from tet-b and two from en with an N₆ chromophore about nickel(II) ion. The crystal packing analysis shows that the complex cations, α-[Ni(tet-b)(en)]²⁺ are interconnected by perchlorate ions through conventional two-center (N)H?···?O, and bifurcated (N)H?···?O?···?H(N) hydrogen bonding.     

一种锰的超分子化合物的制备、结构及非线性光学 性质研究

用MnSO4·H2O,KSCN,六次甲基四胺(HMTA)制备出超分子化合物[Mn(NCS)2(H2O)2(HMTA)2][Mn(NCS)2(H2O)4](H2O)2,并测定了其晶体结构。该化合物由[Mn(NCS)2(H2O)2(HMTA)2],[Mn(NCS)2(H2O)4]和H2O三部分组成,每一个HMTA配体中仅有一个N原子与Mn原子配位,剩余的3个N分别与[Mn(NCS)2(H2O)4]中的H2O及结晶H2O之间形成氢键。[Mn(NCS)2(H2O)2(HMTA)2]和[Mn(NCS)2(H2O)4]之间通过N…H—O氢键边接成无限延伸的线性长链,链与链、以及链和结晶H2O之间通过七种形式的氢键构成三维结构的超分子。用Z-扫描法测定该化合物在DMF溶液中的三阶非线性光学性质,发现它具有自聚焦效应,三阶非线性折射系数n2=9.52×10^-9m^2·W^-1,非线性极化率χ^(3)=3.41×10^-12esu.     

Synthesis and Crystal Structure of an Ion- pair Compound: [HL]_2[Ni(CN)_4]·4H_2O (L = 4-(2- Hydroxyphenyl)-1,5, 9-triazacyclododecan-2-one)

1INTRODUCTIONCyclicpolyamineshaveoriginatedagreatdealofinterestowingtotheirbiologicalactivity[1～3]andalotofmetalcomplexeswithmacrocyclicpoly-amineligandssuchastriamine[12]aneN4,tetra-aminecyclen,cyclam,pentaamine[16]aneN5,theirderivativesandsoonhavebeens…