Synthesis, Crystal Structure and Antitumor Study of a Zinc Complex of the 2-Benzoylpyridine Thiosemicarbazone Ligand

2008 ◽  
Vol 63 (3) ◽  
pp. 280-284 ◽  
Author(s):  
Ming Xue Li ◽  
Jing Zhou ◽  
Chun Ling Chen ◽  
Jing Ping Wang
Keyword(s):  
Zinc Complex ◽  
Free Ligand ◽  
Chain Structure ◽  
Distorted Octahedral Geometry ◽  
Activity Measurement ◽  
X Ray Diffraction ◽  
Thiosemicarbazone Ligand ◽  
Distorted Octahedral ◽  
Lung Cancer A549 Cell ◽  
Solvate Molecule

A zinc complex of the 2-benzoylpyridine thiosemicarbazone (Hbpt) ligand, Zn(bpt)2 · DMF, has been synthesized and characterized by elemental analysis, IR spectra and single crystal X-ray diffraction. The molecular structure has a Zn2+ cation bonded to two perpendicular bpt ligands in a distorted octahedral geometry through two sulfur and four nitrogen atoms. The crystal contains a disordered DMF solvate molecule. Adjacent molecules are interconnected by means of hydrogen bonding generating a 1-D chain structure. The cytotoxic activity measurement indicates that the complex exhibits higher antitumor activity against lung cancer A549 cell lines than the free ligand.

Synthesis and Crystal Structure of a New Copper(II) Coordination Polymer [CuC16 H18 N4O4S]n*

2012 ◽  
Vol 554-556 ◽  
pp. 268-272
Author(s):  
Jia Gui Li ◽  
Wan Ren Zhu ◽  
Shu Hong Ding ◽  
Yuan Chen ◽  
Yu Lin Zhu ◽  
...  
Keyword(s):  
Self Assembly ◽  
Chain Structure ◽  
Distorted Octahedral Geometry ◽  
Polymeric Chain ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Synthesis And Crystal Structure ◽  
One Dimensional ◽  
Cell Parameters ◽  
Distorted Octahedral

A new one-dimensional [CuC16H18N4O4S]n(1) was synthesized by the self-assembly of a ligand 2,5-thiophenediformates, 3,5-dimethylpyrazole and copper(II), and characterized by elemental analysis, IR and single-crystal X-ray diffraction. 1 crystallizes in monoclinic, space group C2/c with unit cell parameters, a=18.6156(4), b=5.96110(10), c= 18.1598(4)Å, =115.467(2)°, Z=4, V=1819.37(7)Å3, Mr = 425.94, Dc = 1.555g/cm3, μ=1.345mm-1, and F(000)= 876. The final R and wR are 0.0328 and 0.0816 for 7611 observed reflections with I>2σ(I). 1 shows an infinite 1-D polymeric chain structure based on the repeated basic units Cu(II)(3,5-dimethylpyrazole)2(2,5-thiophene diformate). The Cu(II)center acts as the joint of the unit, and is coordinated in a slightly distorted octahedral geometry comprised of four O atoms from two different 2,5-thiophenediformate ligands and two N atoms of two trans 3,5-dimethylpyrazole ligands.

Structure and Fluorescence Properties of a Novel Supramolecular Zinc Complex

2008 ◽  
Vol 63 (12) ◽  
pp. 1357-1360 ◽  
Author(s):  
Gang Chen
Keyword(s):  
Hydrothermal Reaction ◽  
Three Dimensional ◽  
Free Ligand ◽  
Distorted Octahedral Geometry ◽  
Monoclinic Space Group ◽  
Ligand Complex ◽  
Complex Molecules ◽  
Hydrogen Bonding Interactions ◽  
Distorted Octahedral ◽  
Cell Dimensions

Hydrothermal reaction of Zn(NO3)2 · 6H2O and 2-hydroxypyridine-3-carboxylic acid afforded a novel supramolecular complex, [Zn(C6H4NO3)2(H2O)2] (1). The complex has been characterized by macroanalysis, IR spectra, and thermogravimetric and differential thermal analysis (TG/DTA). Single crystal X-ray analysis shows that complex 1 crystallizes in the monoclinic space group P21/c with the cell dimensions a = 7.534(6), b = 12.289(1), c = 7.534(6) Å, β = 100.51°, V = 685.85(1) Å3, and Z = 2. The six-coordinated Zn atom is in a severely distorted octahedral geometry. The complex molecules are assembled via strong O-H· · ·O and N-H· · ·O hydrogen bonding interactions into a three-dimensional supramolecular framework. Compared with the free ligand, complex 1 exhibits strong fluorescence in the solid state at room temperature.

scholarly journals Poly[[tetra-μ-cyanido-κ8C:N-dodeca-cyanido-κ12C-tris(N,N-dimethylformamide-κO)tris(methanol-κO)tris(3,4,7,8-tetramethyl-1,10-phenanthroline-κ2N,N′)trimanganese(II)ditungstate(V)] dihydrate]

2014 ◽  
Vol 70 (5) ◽  
pp. m170-m171
Author(s):  
Fei-Lin Yang ◽  
Dan Yang
Keyword(s):  
Water Molecule ◽  
Title Compound ◽  
Chain Structure ◽  
Octahedral Geometry ◽  
The Other ◽  
Distorted Octahedral Geometry ◽  
Water Molecules ◽  
Asymmetric Unit ◽  
Π Interactions ◽  
Distorted Octahedral

The asymmetric unit of the title compound, {[Mn3{W(CN)8}2(C16H16N2)3(C3H7NO)3(CH3OH)3]·2H2O}n, consists of three [Mn(N,N-dimethylformamide)(methanol)(3,4,7,8-tetramethyl-1,10-phenanthroline)]2+cations, two [W(CN)8]3−anions and two water molecules. Each water molecule is disordered over three sets of sites, with a refined occupancy ratio of 0.310 (9):0.275 (9):0.415 (9) for one molecule and 0.335 (9):0.288 (9):0.377 (9) for the other molecule. The MnIIatoms exhibit a distorted octahedral geometry, while the WVatoms adopt a distorted square-antiprismatic geometry. The MnIIand WVatoms are linked alternatively through cyanide groups, forming a tetranuclear 12-atom rhombic metallacycle. Adjacent metallacycles are further connected by μ2-bridging cyanide anions, generating a 3,2-chain structure running parallel to [101]. Interchain π–π interactions are observed [centroid–centroid distances = 3.763 (3) and 3.620 (2) Å].

Reaction of 2-[(2-aminoethyl)amino]ethanol with pyridine-2-carbaldehyde and complexation of the products with CuII and CdII along with docking studies

2019 ◽  
Vol 75 (7) ◽  
pp. 951-959 ◽  
Author(s):  
Zahra Mardani ◽  
Mohammad Hakimi ◽  
Keyvan Moeini ◽  
Fabian Mohr
Keyword(s):  
Crystal Packing ◽  
Docking Studies ◽  
Molar Ratio ◽  
Distorted Octahedral Geometry ◽  
X Ray Diffraction ◽  
Donor Ligand ◽  
X Ray ◽  
H Nmr ◽  
Distorted Octahedral ◽  
Ft Ir

The reaction between 2-[2-(aminoethyl)amino]ethanol and pyridine-2-carbaldehyde in a 1:2 molar ratio affords a mixture containing 2-({2-[(pyridin-2-ylmethylidene)amino]ethyl}amino)ethanol (PMAE) and 2-[2-(pyridin-2-yl)oxazolidin-3-yl]-N-(pyridin-2-ylmethylidene)ethanamine (POPME). Treatment of this mixture with copper(II) chloride or cadmium(II) chloride gave trichlorido[(2-hydroxyethyl)({2-[(pyridin-2-ylmethylidene)amino]ethyl})azanium]copper(II) monohydrate, [Cu(C10H16N3O)Cl3]·H2O or [Cu(HPMAE)Cl3]·H2O, 1, and dichlorido{2-[2-(pyridin-2-yl)oxazolidin-3-yl]-N-(pyridin-2-ylmethylidene)ethanamine}cadmium(II), [CdCl2(C16H18N4O)] or [CdCl2(POPME)], 2, which were characterized by elemental analysis, FT–IR, Raman and 1H NMR spectroscopy and single-crystal X-ray diffraction. PMAE is potentially a tetradentate N3O-donor ligand but coordinates to copper here as an N2 donor. In the structure of 1, the geometry around the Cu atom is distorted square pyramidal. In 2, the Cd atom has a distorted octahedral geometry. In addition to the hydrogen bonds, there are π–π stacking interactions between the pyridine rings in the crystal packing of 1 and 2. The ability of PMAE, POPME and 1 to interact with ten selected biomolecules (BRAF kinase, CatB, DNA gyrase, HDAC7, rHA, RNR, TrxR, TS, Top II and B-DNA) was investigated by docking studies and compared with doxorubicin.

Synthesis, Characterization, and Ethylene Oligomerization and Polymerization by 2-Quinoxalinyl-6-iminopyridine Chromium Chlorides

2008 ◽  
Vol 61 (5) ◽  
pp. 397 ◽  
Author(s):  
Saliu A. Amolegbe ◽  
Maliha Asma ◽  
Min Zhang ◽  
Gang Li ◽  
Wen-Hua Sun
Keyword(s):  
High Selectivity ◽  
Ethylene Oligomerization ◽  
Distorted Octahedral Geometry ◽  
Electronic Effects ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
Co Catalyst ◽  
X Ray ◽  
Catalytic Activities ◽  
Distorted Octahedral

A series of chromium(iii) complexes ligated by N^N^N tridentate 2-quinoxalinyl-6-iminopyridine were synthesized and characterized by elemental analysis and infrared spectroscopy. Single-crystal X-ray diffraction analysis for the structure of complex C3 reveals a distorted octahedral geometry. When methylaluminoxane was employed as the co-catalyst, the chromium complexes showed high activities for ethylene oligomerization and polymerization. The distribution of oligomers obtained followed Schulz–Flory rules with high selectivity for α-olefins. Both steric and electronic effects of coordinated ligands affected the catalytic activities as well as the properties of the catalytic products. The parameters of the reaction conditions were also investigated to explore the optimum catalytic potentials of these complexes.

scholarly journals Hydrothermal Synthesis, Structural Characterization, and Interaction Mechanism with DNA of Copper(II) Complex Containing 2,2′-Bipyridine

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Ting Liu ◽  
Yi-An Wang ◽  
Qing Zang ◽  
Guo-Qing Zhong
Keyword(s):  
Fluorescence Probe ◽  
Interaction Mechanism ◽  
Distorted Octahedral Geometry ◽  
Water Molecules ◽  
Binding Modes ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Distorted Octahedral ◽  
Elemental Analyses ◽  
Polymeric Chains

A Cu(II) complex [Cu(bipy)(H2O)2(SO4)]n (bipy = 2,2′-bipyridine) was synthesized by hydrothermal method and characterized structurally by elemental analyses, single crystal X-ray diffraction, infrared spectra, and thermogravimetry and differential scanning calorimetry. The Cu(II) was hexacoordinated by two N atoms from bipy, two O atoms from different sulfate radical anions, and two O atoms from two water molecules, forming a slightly distorted octahedral geometry, and bridged by sulfato groups into polymeric chains. Under the condition of physiological pH, the interaction mechanism between the complex and hsDNA was explored with acridine orange as a fluorescence probe by spectroscopic methods. The binding modes between the complex and hsDNA were the electrostatic and embedded modes.

Synthesis, crystal structure and fluorescence spectrum of a cadmium(II) sulfaquinoxaline complex

2013 ◽  
Vol 69 (11) ◽  
pp. 1332-1335 ◽  
Author(s):  
Xiu-Hua Zhao ◽  
Ya-Yun Zhao ◽  
Jie Zhang ◽  
Jian-Guo Pan ◽  
Xing Li
Keyword(s):  
Thermal Analysis ◽  
Single Crystal ◽  
Fluorescence Spectrum ◽  
Chain Structure ◽  
Zigzag Chain ◽  
X Ray Diffraction ◽  
One Dimensional ◽  
X Ray ◽  
Distorted Octahedral Coordination Geometry ◽  
Distorted Octahedral

catena-Poly[[[4-amino-N-(quinoxalin-2-yl)benzenesulfonamidato]aquacadmium(II)]-μ-4-amino-N-(quinoxalin-2-yl)benzenesulfonamidato], [Cd(C14H11N4O2S)2(H2O)], has been synthesized hydrothermally and characterized by single-crystal X-ray diffraction, elemental analysis, fluorescence, IR and thermal analysis. Single-crystal X-ray analysis reveals that the complex is a one-dimensional zigzag chain structure, and the CdIIcation has a distorted octahedral coordination geometry formed by five N atoms from three different sulfaquinoxaline ligands and one O atom from a water molecule. The fluorescence spectrum reveals that the complex emits strong blue fluorescence and thermal analysis shows that the complex has high thermal stability.

Synthesis, Structural Characterization and Photoluminescence of Six-Coordinated Zn(II) Complex Material

2011 ◽  
Vol 321 ◽  
pp. 63-66
Author(s):  
Li Hua Wang
Keyword(s):  
Crystal Packing ◽  
Fluorescence Emission ◽  
Chain Structure ◽  
X Ray Diffraction ◽  
Coordination Environment ◽  
Complex Material ◽  
One Dimensional ◽  
Distorted Octahedral ◽  
Pyrazinecarboxylic Acid ◽  
Distorted Octahedral Coordination Environment

Six-coordinated Zn (II) complex material {bis[5-methyl-2-pyrazinecarboxylic acid] Zinc(II)} was synthesized and determined by single-crystal X-ray diffraction, The results of crystal structure show that Zn (II) complex material crystallizes in a triclinic system, the Zn2+ ion is in a distorted octahedral coordination environment. In the crystal packing, the molecules form a one-dimensional chain structure by O-H•••O hydrogen bonds and π-π interaction of pyrazine rings. The photoluminescence of the Zn(II) complex material was tested, the result shows that the complex displays a fluorescence emission maximum at 525 nm.

scholarly journals Crystal structure of μ-cyanido-1:2κ2N:C-dicyanido-1κC,2κC-bis(quinolin-8-amine-1κ2N,N′)-2-silver(I)-1-silver(II): rare occurrence of a mixed-valence AgI,IIcompound

2015 ◽  
Vol 71 (6) ◽  
pp. 698-701 ◽  
Author(s):  
Zouaoui Setifi ◽  
Sylvain Bernès ◽  
Olivier Pérez ◽  
Fatima Setifi ◽  
Djamil-Azzeddine Rouag
Keyword(s):  
Molecular Complex ◽  
Mixed Valence ◽  
Distorted Octahedral Geometry ◽  
X Ray Diffraction ◽  
Dimensional Network ◽  
Distorted Octahedral ◽  
Class 1 ◽  
Mixed Valence Compound ◽  
Amine Ligands ◽  
Cyanide Ligands

The title dinuclear complex, [Ag2(CN)3(C9H8N2)2], may be considered as an AgIIcompound with the corresponding metal site coordinated by two bidentate quinolin-8-amine molecules, one cyanide group and one dicyanidoargentate(I) anion, [Ag(CN)2]−. Since this latter ligand contains an AgIatom, the complex should be a class 1 or class 2 mixed-valence compound, according to the Robin–Day classification. The AgIIatom is six-coordinated in a highly distorted octahedral geometry, while the AgIatom displays the expected linear geometry. In the crystal, the amino groups of the quinolin-8-amine ligands form N—H...N hydrogen bonds with the N atoms of the non-bridging cyanide ligands, forming a two-dimensional network parallel to (102). The terminal cyanide ligands are not engaged in polymeric bonds and the title compound is an authentic molecular complex. The title molecule is thus a rare example of a stable AgI,IIcomplex, and the first mixed-valence AgI,IImolecular complex characterized by X-ray diffraction.

scholarly journals Preparation and Structures of Ternary Copper(II) Complexes of ADP and ATP Models for Enzyme-Metal Ion-Nucleoside Polyphosphate Complexes

1982 ◽  
Vol 37 (7) ◽  
pp. 863-871 ◽  
Author(s):  
William S. Sheldrick
Keyword(s):  
Metal Ion ◽  
Basic Structure ◽  
Axial Position ◽  
Distorted Octahedral Geometry ◽  
X Ray Diffraction ◽  
Bidentate Coordination ◽  
X Ray ◽  
Ph Values ◽  
Distorted Octahedral ◽  
The Third Terminal

AbstractThe stable ternary copper(II) complexes of ATP and ADP, [Cu(H2ATP)(phen)]2 · 7 H2O (2) and [Cu4(HADP)2(bipy)4(H2O)2(NO3)2] · 2 NO3 (3), have been isolated from aqueous solution at respective pH values of 2.8 and 4.0. Their structures have been established by single crystal X-ray diffraction. Tridentate coordination of each of the Cu atoms by ono α-, one β- and one γ-phosphate O atom of one ATP molecule is observed in 2. The binding Oα atoms occupy axial positions in a distorted octahedral geometry at Cu and the Cu- Oα interactions are weak. The other axial position is occupied by a γ-phosphate O atom of the second ATP molecule, leading to a dimeric structure. The basic structure of 3 is similar with, in this case, bidentate coordination of each of the central Cu atoms by one α- and one β-phosphate O atom of ono ADP molecule. In this case, however, the third terminal β-phosphate O atoms each bind a further Cu atom. All four Cu atoms in 3 display square pyramidal coordination. The structures of 2 and 3 are stabilised by intramolecular stacking of adenine and phenanthroline/bipyridyl systems. The significance of these structures as models for enzyme-metal ion-nucleoside polyphosphate complexes is discussed.

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