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.

scholarly journals Crystal structure ofcatena-poly[[[tetraaquairon(II)]-trans-μ-1,2-bis(pyridin-4-yl)ethene-κ2N:N′] bis(p-toluenesulfonate) methanol disolvate]

2017 ◽  
Vol 73 (12) ◽  
pp. 1977-1980
Author(s):  
Volodymyr M. Hiiuk ◽  
Diana D. Barakhty ◽  
Sergiu Shova ◽  
Ruslan A. Polunin ◽  
Il'ya A. Gural'skiy
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Distorted Octahedral Geometry ◽  
Water Molecules ◽  
Supramolecular Network ◽  
Polymeric Complex ◽  
Distorted Octahedral ◽  
Polymeric Chains ◽  
Coordinated Water

In the title polymeric complex, {[Fe(C12H10N2)2(H2O)4](CH3C6H4SO3)2·2CH3OH}n, the FeIIcation, located on an inversion centre, is coordinated by four water molecules in the equatorial positions and two 1,2-bis(pyridin-4-yl)ethene molecules in the axial positions. This results in a distorted octahedral geometry for the [N2O4] coordination polyhedron. The 1,2-bis(pyridin-4-yl)ethene molecules bridge the FeIIcations, forming polymeric chains running along thea-axis direction. Stabilization of the crystal structure is provided by O—H...O hydrogen bonds; these are formed by coordinated water molecules as donors towards the O atoms of the methanol molecules and tosylate anions as acceptors of protons, leading to the formation of a three-dimensional supramolecular network. Weak C—H...O hydrogen bonds are also observed in the crystal.

Synthesis, Crystal Structure, and DNA-Binding Studies of a Ni(II) Complex with the Tris(N-methylbenzimidazol-2-ylmethyl)amine Ligand

2010 ◽  
Vol 65 (11) ◽  
pp. 1341-1348 ◽  
Author(s):  
Huilu Wu ◽  
Ke Li ◽  
Tao Sun ◽  
Bin Liu ◽  
Fei Jia ◽  
...  
Keyword(s):  
Dna Binding ◽  
Binding Mode ◽  
Distorted Octahedral Geometry ◽  
X Ray Diffraction ◽  
Binding Studies ◽  
Binding Properties ◽  
Distorted Octahedral ◽  
Elemental Analyses ◽  
Dna Binding Studies ◽  
Dna Binding Properties

A tripod ligand tris(N-methylbenzimidazol-2-ylmethyl)amine (Mentb) and its nickel(II) picrate (pic) complex, with composition [Ni(Mentb)(DMF)(H2O)](pic)2, have been synthesized and characterized on the basis of elemental analyses, molar conductivities, IR spectra, and UV/Vis measurements. Single-crystal X-ray diffraction revealed that the Ni atom is six-coordinated in a distorted octahedral geometry. In addition, the DNA-binding properties of the ligand Mentb and its Ni(II) complex have been investigated by electronic absorption, fluorescence and viscosity measurements. The experimental results suggest that the ligand and its Ni(II) complex bind to DNA via an intercalation binding mode, and their binding affinity to DNA follows the order of complex>ligand.

Synthesis and Crystal Structure of Bis(L-α-N-(2-Pyridylmethy)phenylalaninato-N, N', O)-Zinc(II) Trihydrate

2011 ◽  
Vol 233-235 ◽  
pp. 2460-2463
Author(s):  
Qi You ◽  
Yu Cui ◽  
Guo Xin Sun ◽  
Yu Lan Yang
Keyword(s):  
Methyl Ester ◽  
Free Water ◽  
Distorted Octahedral Geometry ◽  
Water Molecules ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
Synthesis And Crystal Structure ◽  
Distorted Octahedral ◽  
Network Of Hydrogen Bonds ◽  
Phenylalanine Methyl Ester

N-(2-pyridylmethyl)-L-phenylalanine methyl ester was synthesized in our laboratory，and the title compound was synthesized by the reaction of N-(2-pyridylmethyl)-L-phenylalanine methyl ester and Zinc acetate dehydrate. Bis(L-α-N-(2-pyridylmethy)phenylalaninato-N, N', O)-Zinc(II) trihydrate was prepared and structurally characterized by X-ray diffraction. It crystallizes in orthorhombic, space group P21212 with a= 15.0928 (8), b = 16.4209 (6), c = 5.9930 (3) Å, V = 1485.29 (12) Å3, Z = 2, Mr= 630.00, Dx = 1.409 g/cm3, μ = 0.88 mm-1, F(000) = 660, Rint = 0.0205, R = 0.028 and wR = 0.059 for 2943 observed reflections with I > 2σ(I). It is a mononuclear discrete structure. The zinc atom coordinates with two oxygen and four nitrogen atoms from two ligands in a distorted octahedral geometry, with the oxygen atom from the carboxylate, two of nitrogen atoms from NH parts and the other two nitrogen atoms from the pyridine ring. With three free water molecules, the present structure has a network of hydrogen bonds.

A Rare Example of a Dinuclear Cobalt(II) Complex with Dipicolinate and Bridging 2-Aminopyrazine Ligands. Preparation, Structural, Spectroscopic and Thermal Characterization

2011 ◽  
Vol 66 (8) ◽  
pp. 813-818 ◽  
Author(s):  
Masoumeh Tabatabaee ◽  
Boris-Marko Kukovec ◽  
Vajieh Razavimahmoudabadi
Keyword(s):  
Dipicolinic Acid ◽  
3D Structure ◽  
Thermal Characterization ◽  
Water Molecules ◽  
X Ray Diffraction ◽  
Coordination Environment ◽  
Distorted Octahedral ◽  
Elemental Analyses ◽  
Coordinated Water ◽  
Oxygen Atoms

A dinuclear cobalt(II) complex, [Co2(H2O)4(dipic)2(μ-apyz)] (dipicH2 = pyridine-2,6-dicarboxylic (dipicolinic) acid, apyz = 2-aminopyrazine) (1), has been hydrothermally synthesized and characterized by elemental analyses, spectroscopic methods (IR, UV/Vis), thermal analysis as well as by X-ray diffraction studies. The dinuclear complex is composed of two cobalt(II) ions bridged by a 2-aminopyrazine molecule. Each cobalt(II) ion is coordinated by one nitrogen and two oxygen atoms of the tridentate dipicolinate anion, one heterocyclic nitrogen atom of the 2-aminopyrazine and two oxygen atoms of coordinated water molecules. The resulting geometry for the CoN2O4 coordination environment can be described as distorted octahedral. Various hydrogen bonds of the type O-H···O and N-H···O are also present in the crystal structure. This arrangement leads to the formation of a 3D structure.

Syntheses, crystal structures, and characterization of two Mn(II) coordination polymers with bis(4-(1H-imidazol-1-yl)phenyl)methanone ligands

2016 ◽  
Vol 71 (8) ◽  
pp. 869-874 ◽  
Author(s):  
Gao-Feng Wang ◽  
Xiao Zhang ◽  
Shu-Wen Sun ◽  
Hong Sun ◽  
Xia Yang ◽  
...  
Keyword(s):  
Ir Spectroscopy ◽  
Single Crystal ◽  
Coordination Polymers ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
X Ray Diffraction ◽  
X Ray ◽  
Distorted Octahedral ◽  
Elemental Analyses

AbstractTwo Mn(II) complexes, {[Mn(BIPMO)2Cl2] · 2(H2O)}n (1) and {[Mn(BIPMO)2(SCN)2] · 2(CH3OH)}n (2) (BIPMO = bis(4-(1H-imidazol-1-yl)phenyl)methanone) with V-shaped BIPMO ligands, were synthesized and characterized by IR spectroscopy and elemental analyses along with their single-crystal X-ray diffraction analyses. The Mn(II) ions in 1 and 2 are both six-coordinated to four nitrogen atoms of four BIPMO ligands and two anions (Cl− for 1, and SCN− for 2) to form a distorted octahedral geometry.

A helical coordination polymer of zinc(II), 4-hydroxybenzohydrazide and sulfate ions

2013 ◽  
Vol 69 (3) ◽  
pp. 229-231
Author(s):  
Halina Zasłona ◽  
Piotr Drożdżewski ◽  
Maciej Barys
Keyword(s):  
Coordination Polymer ◽  
Zinc Complex ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
Water Molecules ◽  
The Novel ◽  
Sulfate Ions ◽  
Counter Ions ◽  
Distorted Octahedral ◽  
Polymeric Chains

In the structure of the novel zinc complexcatena-poly[[diaqua(4-hydroxybenzohydrazide)zinc(II)]-μ-sulfato], [Zn(SO4)(C7H8N2O2)(H2O)2]n, the complex cations are linked by sulfate counter-ions into helical polymeric chains extending along thebaxis. Each helix is stabilized by six intrachain hydrogen bonds involving stronger O—H...O (1.83–2.06 Å) and weaker N—H...O (2.20–2.49 Å) interactions. The ZnIIatom displays a distorted octahedral geometry formed by the 4-hydroxybenzohydrazide ligand, two water molecules and two SO42−ions, which is very similar to the metal-atom environment in a previously reported CoIIcomplex [Zasłona, Drożdżewski & Kubiak (2010).J. Mol. Struct.982, 1–8], especially the Zn—O and Zn—N bond lengths of 2.0453 (12)–2.1602 (9) and 2.1118 (12) Å, respectively.

scholarly journals Crystal structure of bis[(1-ammonio-1-phosphonoethyl)phosphonato]tetraaquacadmium dihydrate: a powder X-ray diffraction study

2015 ◽  
Vol 71 (4) ◽  
pp. 342-345 ◽  
Author(s):  
Mwaffak Rukiah ◽  
Thaer Assaad
Keyword(s):  
Complex Molecule ◽  
Three Dimensional ◽  
Distorted Octahedral Geometry ◽  
Water Molecules ◽  
X Ray Diffraction ◽  
Complex Molecules ◽  
Lattice Water ◽  
Dimensional Network ◽  
Distorted Octahedral ◽  
Ring Motif

In the title compound, [CdL2(H2O)4]·2H2O [L= (1-ammonio-1-phosphonoethyl)phosphonate, C2H8NO6P2−], the CdIIion is situated on an inversion centre being coordinated by four aqua molecules in the equatorial plane and two phosphonate O atoms from two deprotonatedLligands in the axial positions in a distorted octahedral geometry. The asymmetric unit contains one-half of the complex molecule and one lattice water molecule. The ligandLexists in a zwitterionic form, with a positive charge on the NH3group and a negative charge on the O atom of the non-coordinating phosphonate group, and with an intramolecular O—H...O interaction forming anS(6) ring motif and two intramolecular N—H...O interactions each generating anS(5) ring motif. In the crystal, N—H...O and O—H...O hydrogen bonds link the complex molecules into a three-dimensional network in which the voids of 38 Å3are filled with ordered lattice water molecules, which are also involved in O—H...O hydrogen bonding.

Synthesis and structural characterization of Mn(II) and Cu(II) complexes with bis(4-(1H-imidazol-1-yl)phenyl)methanone ligands

2017 ◽  
Vol 72 (1) ◽  
pp. 83-87 ◽  
Author(s):  
Gao-Feng Wang ◽  
Xiao Zhang ◽  
Zhao-Rong Liu ◽  
Yu-Chun Wang ◽  
Hong-Shi Jiang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Octahedral Geometry ◽  
Helical Chain ◽  
Distorted Octahedral Geometry ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bridging Ligand ◽  
Distorted Octahedral ◽  
Elemental Analyses

AbstractTwo complexes, {Mn(hfac)2(BIPMO)}n (1), {Cu(hfac)2(BIPMO)}n (2) [hfac=1,1,1,5,5,5-hexafluoro-pentane-2,4-dionato(–), BIPMO=bis(4-(1H-imidazol-1-yl)phenyl)methanone], with the V-shaped ligands were synthesized and characterized by infrared spectroscopy, elemental analyses, along with single-crystal X-ray diffraction analyses. The X-ray diffraction studies have shown that the metal ions in 1 and 2 are both six-coordinated to two nitrogen atoms of two BIPMO ligands and four oxygen atoms of two hfac ligands to form a distorted octahedral geometry. Each BIPMO ligand acts as a bridging ligand to link two adjacent metal(II) atoms to form a helical chain in the crystal structure.

scholarly journals Crystal structure ofcatena-poly[[cadmium(II)-di-μ2-bromido-μ2-L-proline-κ2O:O′] monohydrate]

2015 ◽  
Vol 71 (2) ◽  
pp. 217-219 ◽  
Author(s):  
S. Sathiskumar ◽  
T. Balakrishnan ◽  
K. Ramamurthi ◽  
S. Thamotharan
Keyword(s):  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Octahedral Geometry ◽  
Dimensional Structure ◽  
Distorted Octahedral Geometry ◽  
Water Molecules ◽  
Zwitterionic Form ◽  
Carboxylate Oxygen ◽  
Distorted Octahedral ◽  
Polymeric Chains

In the title coordination polymer, {[CdBr2(C5H9NO2)]·H2O}n, the CdIIion is coordinated by four bromido ligands and two carboxylate oxygen atoms of two symmetry-related proline ligands, which exist in a zwitterionic form, in a distorted octahedral geometry. There is an intramolecular N—H...O hydrogen bond between the amino group and the carboxylate fragment. Each coordinating ligand bridges two CdIIatoms, thus forming polymeric chains running along thec-axis direction. The water molecules of crystallization serve as donors for the weak intermolecular O—H...O and O—H...Br hydrogen bonds that link adjacent polymeric chains, thus forming a three-dimensional structure. N—H...O and N—H...Br hydrogen bonds also occur.

Magnetic properties of anhydrous and hydrated dimethylphosphinates of manganese(II). The crystal and molecular structure of poly-bis(μ-dimethylphosphinato)diaquomanganese(II)

1985 ◽  
Vol 63 (5) ◽  
pp. 1055-1062 ◽  
Author(s):  
Walter V. Cicha ◽  
John S. Haynes ◽  
Katherine W. Oliver ◽  
Steven J. Rettig ◽  
Robert C. Thompson ◽  
...  
Keyword(s):  
Heavy Atom ◽  
Indirect Evidence ◽  
Theoretical Models ◽  
Water Molecules ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Magnetic Exchange ◽  
Distorted Octahedral ◽  
Anhydrous Compound ◽  
Manganese Compounds

The dimethylphosphinate of manganese(II), Mn[(CH3)2PO2]2, and its dihydrate have been prepared and studied using magnetic susceptibility, differential scanning calorimetry, and electronic and vibrational spectroscopic methods. The dihydrate was obtained in crystalline form and a single crystal X-ray diffraction study revealed a polymeric structure.Crystals of poly-bis(μ-dimethylphosphinato)diaquomanganese(II) are monoclinic, a = 20.722(3), b = 4.8652(2), c = 11.0689(14) Å, β = 102.209(7)°, Z = 4, space group C2/c. The structure was solved by conventional heavy-atom methods and was refined by full-matrix least-squares procedures to R = 0.030 and Rw = 0.033 for 983 reflections with I ≥ 3σ(I). The structure consists of infinite centrosymmetric chains of Mn(II) atoms linked by double phosphinate bridges and extending along the crystallographic b axis. The water molecules are involved in both interchain and bifurcated intrachain hydrogen bonding [Formula: see text], 2.899(3) and 3.120(3) Å). The coordination about Mn is slightly distorted octahedral with libration-corrected bond lengths Mn—O(phosphinato) = 2.156(2) and 2.212(2), Mn—OH2 = 2.247(2) Å.Magnetic susceptibility studies on the dihydrate from 300 to 4.2 K reveal a magnetic moment of ~5.9 BM over most of the range and give no evidence for significant magnetic exchange. The anhydrous compound, which is considered on the basis of indirect evidence to retain the double phosphinate bridged structure exhibited by the dihydrate, shows relatively strong antiferromagnetic behaviour. The data have been analyzed according to two theoretical models both of which employ the isotropic Heinsenberg Hamiltonian. The scaling model of Wagner and Friedberg gives J = −2.94 cm−1 and g = 2.02 and the interpolation scheme of Weng gives J = −2.69 cm−1 and g = 2.01. The magnitude of the exchange coupling is considered in relation to that observed in related manganese compounds and possible reasons for the observed damping of the exchange on hydration are discussed.

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