Synthesis, Structure and Antioxidant Activity of Mixed
Ruthenium(III) Benzoyl Pyridine Complex

A new ruthenium arsine complex was prepared by reacting equimolar ratio of [RuBr3(AsPh3)3] and 2-benzoyl pyridine. It was characterized by microanalysis, FT-IR and single crystal X-ray diffraction studies. X-ray diffraction data showed the distorted octahedral geometry of the complex. The pyridine nitrogen and carbonyl oxygen of the ligand coordinated with the metal center. Antioxidant activity of the complex was analyzed using different assays, which manifested significant activity. It has been found that a newly synthesized complex possessed better antioxidant activity than the ligand and precursor complex.

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

Acta Crystallographica Section C Structural Chemistry ◽

10.1107/s2053229619008258 ◽

2019 ◽

Vol 75 (7) ◽

pp. 951-959 ◽

Cited By ~ 1

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.

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

Australian Journal of Chemistry ◽

10.1071/ch08016 ◽

2008 ◽

Vol 61 (5) ◽

pp. 397 ◽

Cited By ~ 21

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.

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Synthesis, Spectral and Thermal Studies, and Crystal Structure of cis-Bis(4-methylimidazole)bis(picolinato)copper(II) [Cu(pic)2(4-MeIm)2]

Zeitschrift für Naturforschung B ◽

10.1515/znb-2006-1005 ◽

2006 ◽

Vol 61 (10) ◽

pp. 1217-1221 ◽

Cited By ~ 6

Author(s):

Zerrin Heren ◽

Cem Keser ◽

C. Cüneyt Ersanli ◽

O. Zafer Yeşilel ◽

Nazan Ocak

Keyword(s):

Thermal Studies ◽

X Ray Diffraction ◽

Complex Molecules ◽

Triclinic Space Group ◽

X Ray ◽

Cell Parameters ◽

Distorted Octahedral ◽

Ft Ir ◽

In Cis ◽

Hydrogen Bondings

The mixed-ligand picolinato (pic) complex of Cu(II) with 4-methylimidazole (4-MeIm), [Cu(pic)2(4-MeIm)2], was synthesized and characterized by elemental analysis, magnetic susceptibility, spectroscopic methods (UV/vis and FT-IR) and X-ray diffraction. In the slightly distorted octahedral cis-bis(4-methylimidazole)bis(picolinato)copper(II) complex, the pic ligands are coordinated to the Cu(II) ion as bidentate N,O-donors forming chelate rings. The 4-MeIm ligands are N-coordinated in cis positions. The complex crystallizes in the triclinic space group p̅1 with unit cell parameters a = 9.204(5), b = 9.498(5), c = 13.095(5) Å , α = 90.395(5), β = 101.687(5), γ = 112.291(5)° and Z = 2. Hydrogen bondings and C-H ··· π interactions occur between picolinato and methylimidazole ligands of neighboring complex molecules. The thermal decomposition of the complex is described.

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

Zeitschrift für Naturforschung B ◽

10.1515/znb-1982-0715 ◽

1982 ◽

Vol 37 (7) ◽

pp. 863-871 ◽

Cited By ~ 27

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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Synthesis and Structural Aspects of Two Trinuclear Cyano-bridged Heterometallic Complexes with Monodentate Coordination of Perchlorate and Acetate Anions

Zeitschrift für Naturforschung B ◽

10.1515/znb-2010-0909 ◽

2010 ◽

Vol 65 (9) ◽

pp. 1106-1112

Author(s):

Amitabha Datta ◽

Sébastien Pillet ◽

Nien-Tsu Chuang ◽

Hon Man Lee ◽

Jui-Hsien Huang

Keyword(s):

Octahedral Geometry ◽

Heterometallic Complexes ◽

Distorted Octahedral Geometry ◽

X Ray Diffraction ◽

X Ray ◽

Distorted Octahedral ◽

Molecular Stability ◽

Hydrogen Bonding Networks ◽

Monodentate Coordination ◽

Structural Aspects

Two new cyano-bridged trinuclear heterometallic complexes [Ca2(phen)4(ClO4)(H2O)3- Fe(CN)6]・H2O (1) and [Ca2 (phen)4(CH3COO)(H2O)3Fe(CN)6]・2H2O (2) (where phen = 1,10- phenanthroline) have been synthesized and characterized by single-crystal X-ray diffraction techniques, IR spectroscopy and thermogravimetric analysis. The structure of complex 1 features a central [Fe(CN)6]3− unit that links a monocation [Ca(phen)2(H2O)(ClO4)]+ and a dication [Ca(phen)2- (H2O)2]2+ via two trans cyanide bridges. Similarly, complex 2 also features a central [Fe(CN)6]3− unit that links a monocation [Ca(phen)2(H2O)(CH3COO)]+ and a dication [Ca(phen)2(H2O)2]2+ via two trans cyanide bridges. In 1 and 2, both Ca centers are seven-coordinated and achieve a pentagonal- bipyramidal geometry whereas the Fe center in both the complexes possesses a distorted octahedral geometry. Intra- and intermolecular hydrogen bonding networks are present in 1 and 2 that impart the overall molecular stability to both the systems.

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Crystal structure and magnetic properties of a linear tetranuclear CoIIcluster

Acta Crystallographica Section C Structural Chemistry ◽

10.1107/s205322961601281x ◽

2016 ◽

Vol 72 (9) ◽

pp. 697-700

Author(s):

Yingying Wang ◽

Meixia Wen ◽

Zhongjun Gao ◽

Ning Sheng

Keyword(s):

Complex Molecule ◽

Exchange Interactions ◽

Functional Materials ◽

Molecular Magnets ◽

Distorted Octahedral Geometry ◽

X Ray Diffraction ◽

X Ray ◽

Synthetic Strategy ◽

Trigonal Bipyramidal ◽

Distorted Octahedral

Polynuclear complexes are an important class of inorganic functional materials and are of interest particularly for their applications in molecular magnets. Multidentate chelating ligands play an important role in the design and syntheses of polynuclear metal clusters. A novel linear tetranuclear CoIIcluster, namely bis{μ3-(E)-2-[(2-oxidobenzylidene)amino]phenolato}bis{μ2-(E)-2-[(2-oxidobenzylidene)amino]phenolato}bis(1,10-phenanthroline)tetracobalt(II), [Co4(C14H11NO2)4(C12H8N2)2], was prepared under solvothermal conditions through a mixed-ligand synthetic strategy. The structure was determined by X-ray single-crystal diffraction and bulk purity was confirmed by powder X-ray diffraction. The complex molecule has a centrosymmetric tetranuclear chain-like structure and the four CoIIions are located in two different coordination environments. The CoIIions at the ends of the chain are in a slightly distorted octahedral geometry, while the two inner CoIIions are in five-coordinate distorted trigonal bipyramidal environments. A magnetic study reveals ferromagnetic CoII...CoIIexchange interactions for the complex.

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A dinuclear nickel(II) complex derived from an asymmetric Salamo-type N2O2 chelate ligand: synthesis, structure and optical properties

Zeitschrift für Naturforschung B ◽

10.1515/znb-2016-0268 ◽

2017 ◽

Vol 72 (6) ◽

pp. 415-420 ◽

Cited By ~ 21

Author(s):

Xiu-Yan Dong ◽

Quan-Peng Kang ◽

Bo-Xian Jin ◽

Wen-Kui Dong

Keyword(s):

Optical Properties ◽

Molar Conductance ◽

Crystallographic Analysis ◽

Chelate Ligand ◽

X Ray ◽

Coordination Site ◽

Pyridine Nitrogen ◽

Distorted Octahedral ◽

Elemental Analyses ◽

Ft Ir

AbstractA new dinuclear Ni(II) complex, [{Ni(L)(C5H5N)}2], has been synthesized with 4-chloro-4′,6′-dibromo-2,2′-[ethylenedioxybis(nitrilomethylidyne)]diphenol (H2L), and characterized by elemental analyses, FT-IR, UV/Vis, molar conductance and X-ray crystallographic analysis. Each Ni(II) atom is located at a N2O2 coordination site of a completely deprotonated (L)2− unit. Two μ-phenoxo oxygen atoms from two [Ni(L)] units and two pyridine nitrogen atoms coordinate with two Ni(II) atoms. The two hexa-coordinated Ni(II) atoms have slightly distorted octahedral geometries. The μ-phenoxo bridges play important roles in assembling Ni2+ and (L)2− units. This 2:2 (Ni2+:(L)2−) structure is different from that of other Salamo-type Ni(II) complexes reported earlier.

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An ionic Cd/Hg mixed-metal complex with an aminoalcohol ligand

Zeitschrift für Naturforschung B ◽

10.1515/znb-2018-0158 ◽

2018 ◽

Vol 73 (12) ◽

pp. 959-963

Author(s):

Zahra Mardani ◽

Reza Kazemshoar-Duzduzani ◽

Keyvan Moeini ◽

Majid Darroudi ◽

Cameron Carpenter-Warren ◽

...

Keyword(s):

Nmr Spectroscopy ◽

Hydrogen Bonds ◽

Metal Complex ◽

Ionic Structure ◽

X Ray Diffraction ◽

X Ray ◽

Mixed Metal ◽

H Nmr ◽

Distorted Octahedral ◽

Ft Ir

AbstractA cadmium–mercury mixed-metal complex of cis-2-((2-((2-hydroxyethyl)amino)ethyl)amino)cyclohexan-1-ol (HEAC), [Cd(HEAC)2][HgI4] (1), was prepared and identified by elemental analysis, FT-IR, 1H NMR spectroscopy, and single-crystal X-ray diffraction. The X-ray analysis revealed an ionic structure for 1 in which the cadmium and mercury atoms have CdN4O2 and HgI4 environments, with distorted octahedral and tetrahedral geometries, respectively. The packing of the components in the crystal of 1 is supported by O–H···I hydrogen bonds, and these interactions lead to the formation of an ${\rm{R}}_4^4$(22) motif.

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

Zeitschrift für Naturforschung B ◽

10.1515/znb-2016-0050 ◽

2016 ◽

Vol 71 (8) ◽

pp. 869-874 ◽

Cited By ~ 15

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.

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

Zeitschrift für Naturforschung B ◽

10.1515/znb-2016-0152 ◽

2017 ◽

Vol 72 (1) ◽

pp. 83-87 ◽

Cited By ~ 13

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.

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