scholarly journals Synthesis, X-Ray Crystal Structures and Catalytic Epoxidation of Oxidovanadium(V) Complexes with Aroylhydrazone and Ethyl Maltolate Ligands

2021 ◽  
Vol 68 (2) ◽  
pp. 441-446
Author(s):  
Dong-Hui Zou ◽  
Min Liang ◽  
Wei Chen
Keyword(s):  
Single Crystal ◽  
Crystal Structures ◽  
Elemental Analysis ◽  
Electronic Spectroscopy ◽  
Octahedral Coordination ◽  
X Ray ◽  
Catalytic Epoxidation

Two oxidovanadium(V) complexes, [VOL1L] (1) and [VOL2L] (2) (L = ethyl maltolate), derived from the aroylhydrazones 4-bromo-N’-(2-hydroxy-5-methylbenzylidene)benzohydrazide (H2L1) and N’-(3,5-dibromo-2-hydroxybenzylidene)- 4-methoxybenzohydrazide (H2L2), respectively, have been synthesized and characterized by elemental analysis, infrared and electronic spectroscopy. Structures of the complexes were further confirmed by single crystal X-ray determination. The V atoms in the complexes are coordinated by the ONO donor atoms of the aroylhydrazone ligand, OO donor atoms of the ethyl maltolate ligand, and one oxido O atom, forming octahedral coordination. The complexes function as effective olefin

New Cu(II), Co(II), and Ni(II) complexes with thieno[2,3-b]pyridine and 2-methylthieno[2,3-b]pyridine as ligands: Synthesis and crystal structures

2009 ◽  
Vol 63 (3) ◽  
Author(s):  
Ján Halgaš ◽  
Viera Kolenová ◽  
Zuzana Števíková ◽  
Lucia Perašínová ◽  
Jozef Kožíšek
Keyword(s):  
Single Crystal ◽  
Diffraction Analysis ◽  
Crystal Structures ◽  
Elemental Analysis ◽  
Zinc Chloride ◽  
Coordination Compounds ◽  
Biological Activities ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir

AbstractAlthough thienopyridines attract attention because of their biological activities, they have not been used as ligands in coordination compounds. Thieno[2,3-b]pyridine was prepared by known procedures; by reduction of 2-nitrothiophene, and reaction of the resulting 2-thienyl ammonium salt with malondialdehyde tetramethylacetal in the presence of zinc chloride. The same procedure was used for the preparation of a new derivative, 2-methylthieno[2,3-b]pyridine, starting from 2-methyl-5-nitrothiophene. The thienopyridines were used in the synthesis of coordination compounds. Chlorides, isothiocyanates, acetates, and chloroacetates of copper(II), nickel(II), or cobalt(II) were used as starting salts. The prepared complexes were characterized by elemental analysis and FT IR. Structures of the four complexes were determined by single-crystal X-ray diffraction analysis.

Zur Stereochemie des freien Elektronenpaares in AX6E-Systemen, VIII. Statisch verzerrte Anionen in [H3N(CH2)3NH3]3(BiX6)2(H2O)2 mit X = Cl, Br/ On the Stereochemistry of the Lone-Pair Electrons in AX6E-Systems, VIII Statically Distorted Anion in [H3N(CH2)3NH3]3(BiX6)2(H2O)2 with X = Cl, Br

1988 ◽  
Vol 43 (8) ◽  
pp. 1003-1009 ◽  
Author(s):  
André du Bois ◽  
Walter Abriel
Keyword(s):  
Single Crystal ◽  
Crystal Structures ◽  
Coordination Polyhedron ◽  
Lone Pair ◽  
Structural Data ◽  
Octahedral Coordination ◽  
Intensity Data ◽  
Space Group ◽  
X Ray ◽  
Lone Pair Electrons

Abstract Using 293 K diffractometer intensity data, the crystal structures of [H3N(CH2)3NH3]3(BiX6)2(H2O)2 with X - Cl, Br have been determined by single crystal X-ray technique and refined to a final Rw of 0.027 and 0.043, respectively. The structures are isotypic, space group P21/c, Z = 2 with a = 14.415(1). b = 9.7401(7), c = 12.4609(9)Å, β = 105.997(8)°for X - Cl and a = 14.794(2), b = 10.127(2), c = 12.853(2)Å, β = 105.68(2)° for X - Br. Statically distorted BiX63- octahedra confirm the symmetry rules for the stereochemistry of the lone pair electrons in AX6E-systems. Basic structural data for all compounds containing BiX63- and SbXh3 ions (X = Cl, Br, I) known to date are given including the ⊿-values as a measure for the distortion of the octahedral coordination polyhedron.

scholarly journals Nickel (II) and Iron (II) Complexes with Azole Derivatives: Synthesis, Crystal Structures and Antifungal Activities

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Emmanuel N. Nfor ◽  
Peter F. Asobo ◽  
Justin Nenwa ◽  
Oswald N. Nfor ◽  
Julius N. Njapba ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Antifungal Activity ◽  
Aspergillus Niger ◽  
Ir Spectroscopy ◽  
Single Crystal ◽  
Crystal Structures ◽  
Aspergillus Flavus ◽  
Elemental Analysis ◽  
X Ray Diffraction ◽  
X Ray

Two new complexes of nickel (II) with 4-amino-3, 5-bis(pyridyl)-1, 2, 4-triazole (abpt) and iron (II) with 2-(3-phenyl-1H-pyrazole-5-yl) pyridine (phpzpy) have been synthesized and characterized by elemental analysis and IR spectroscopy. The crystal structures of the complexes have been determined by single crystal X-ray diffraction techniques. In the nickel and iron complexes, the ligands are coordinated through nitrogen atoms in bidentate manner. The ligands and their respective complexes have been tested for their antifungal activity against Aspergillus niger, Aspergillus flavus, and Candida albicans. From the study, the complexes showed enhanced activities against the tested organisms compared to the ligands.

scholarly journals Synthesis, Crystal Structures, Characterization and Catalytic Property of Manganese(II) Complexes Derived from Hydrazone Ligands

2020 ◽  
Vol 67 (4) ◽  
pp. 1233-1238
Author(s):  
Yao Tan
Keyword(s):  
Structural Analysis ◽  
Single Crystal ◽  
Crystal Structures ◽  
Catalytic Property ◽  
Octahedral Coordination ◽  
Chemical Methods ◽  
X Ray ◽  
Physico Chemical ◽  
Crystal Structural ◽  
Hydrazone Ligands

A new bromido-coordinated mononuclear manganese(II) complex [MnL1Br2(OH2)] (1), and a new nitrato-coordinated mononuclear manganese(II) complex [Mn(L2)2(ONO2)(OH2)]NO3 (2), with the hydrazone ligands 4-hydroxy-N’-(pyridin-2-ylmethylene)benzohydrazide (HL1) and N’-(pyridin-2-ylmethylene)isonicotinohydrazide (HL2), have been synthesized and structurally characterized by physico-chemical methods and single crystal X-ray determination. Single crystal structural analysis shows that the Mn atom in complex 1 is in octahedral coordination, and that in complex 2 is in pentagonal bipyramidal coordination. The catalytic property for epoxidation of styrene by the complexes was evaluated.

Die Kristallstrukturen von Ni(AlCl4)2, Ni(GaCl4)2 und Na[Ni(AlCl4)3] / Crystal Structures of Ni(AlCl4)2, Ni(GaCl4)2 and Na[Ni(AlCl4)3]

2007 ◽  
Vol 62 (8) ◽  
pp. 1052-1058 ◽  
Author(s):  
Ulrich Keßler ◽  
Rainhard Müller
Keyword(s):  
Characteristic Feature ◽  
Single Crystal ◽  
Crystal Structures ◽  
Structure Analysis ◽  
Nickel Atom ◽  
Structure Type ◽  
Octahedral Coordination ◽  
Bidentate Ligands ◽  
X Ray ◽  
First Time

The crystal structures of Ni(AlCl4)2, Ni(GaCl4)2 and Na[Ni(AlCl4)3] were determined by single crystal X-ray structure analysis. Ni(AlCl4)2 and Ni(GaCl4)2 are isotypic and crystallize in the Co(AlCl4)2 structure type (I2/c, a = 1276.40(9)/1268.48(7), b = 771.41(5)/757,74(3), c = 1145.47(8)/1154.34(7) pm, β = 92.067(3)/91.778(4)°, Z = 4). The structure contains chains of NiCl6 octahedra and AlCl4/GaCl4 tetrahedra linked by corners and edges. Na[Ni(AlCl4)3] represents a new structure type (P21/c, a = 1356.34(6), b = 1200.82(6), c = 1213.31(6) pm, β = 105.647(6)°, Z = 4). Its characteristic feature is the chiral [Ni(AlCl4)3]− anion which is found here for the first time. The tetrachloroaluminate ions serve as bidentate ligands leading to an octahedral coordination of the nickel atom.

scholarly journals Synthesis, Characterization, X-Ray Crystal Structures and Antibacterial Activity of Cobalt(III) Complexes Derived from 5-Bromo-2-((2-(phenylamino) ethylimino)methyl)phenol

2021 ◽  
Vol 68 (4) ◽  
pp. 983-989
Author(s):  
Cheng Liu
Keyword(s):  
Antibacterial Activity ◽  
Schiff Base ◽  
Single Crystal ◽  
Crystal Structures ◽  
Amino Nitrogen ◽  
Antibacterial Activities ◽  
Octahedral Coordination ◽  
Schiff Base Ligands ◽  
X Ray ◽  
Mtt Method

Two new and similar cobalt(III) complexes, [CoL2] · NO3 (1) and [CoL2] · Cl (2), where L is 5-bromo-2-((2-(phenylamino) ethylimino)methyl)phenolate, have been synthesized and characterized by IR and UV-Vis spectra. Structures of the complexes were confirmed by single crystal X-ray determination. The Co atoms in the complexes are in octahedral coordination, with the donor atoms come from the two Schiff base ligands, viz. phenolate oxygen, and imino and amino nitrogen. The anions of the cobalt salts crystallized as counteranions in the complexes. The complexes were assayed for antibacterial activities by MTT method.

Crystal structures of two (5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane)iron(III) complexes

2019 ◽  
Vol 75 (11) ◽  
pp. 1509-1516
Author(s):  
Reese A. Clendening ◽  
Matthias Zeller ◽  
Tong Ren
Keyword(s):  
Single Crystal ◽  
Crystal Structures ◽  
Octahedral Geometry ◽  
Octahedral Coordination ◽  
Coordination Geometry ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bond Angles ◽  
Chloride Ligands ◽  
Planar Geometries

Reported in this contribution are the synthesis and crystal structures of two new FeIII complexes of 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane (HMC), namely, dichlorido(5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane)iron(III) chloride, [FeCl2(C16H36N4)]Cl or cis-[FeCl2(rac-HMC)]Cl (1), and dichlorido(5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane)iron(III) tetrachloridoferrate, [FeCl2(C16H36N4)][FeCl4] or trans-[FeCl2(meso-HMC)][FeCl4] (2). Single-crystal X-ray diffraction studies revealed that both 1 and 2 adopt a pseudo-octahedral geometry, where the macrocycles adopt folded and planar geometries, respectively. The chloride ligands in 1 are cis to each other, while those in 2 have a trans configuration. The relevant bond angles in 1 deviate substantially from an ideal octahedral coordination geometry, with the angles between the cis substituents varying from 81.55 (5) to 107.56 (4)°, and those between the trans-ligating atoms varying from 157.76 (8) to 170.88 (3)°. In contrast, 2 adopts a less strained configuration, in which the N—Fe—N angles vary from 84.61 (8) to 95.39 (8)° and the N—Fe—Cl angles vary from 86.02 (5) to 93.98 (5)°.

scholarly journals Synthesis, Crystal Structures, Characterization and Catalytic Property of Copper(II) Complexes Derived from Hydrazone Ligands

2021 ◽  
Vol 68 (1) ◽  
pp. 44-50
Author(s):  
Yao Tan ◽  
Yan Lei
Keyword(s):  
Single Crystal ◽  
Crystal Structures ◽  
Catalytic Property ◽  
Octahedral Coordination ◽  
Chemical Methods ◽  
X Ray ◽  
Tert Butyl ◽  
Physico Chemical ◽  
Hydrazone Ligands

A new bromido-coordinated mononuclear copper(II) complex [Cu(HL1)Br2] (1), and a new mononuclear copper(II) complex [CuL2(HL2)]ClO4 · 0.5H2O (2), with the hydrazone ligands 4-tert-butyl-N’-(1-(pyridin-2-yl)ethylidene)benzohydrazide (HL1) and 4-bromo-N’-(pyridin-2-ylmethylene)benzohydrazide (HL2), have been synthesized and structurally characterized by physico-chemical methods and single crystal X-ray determination. X-ray analysis indicates that the Cu atom in complex 1 is in distorted square pyramidal coordination, and that in complex 2 is in octahedral coordination. The catalytic property for epoxidation of styrene by the complexes was evaluated.

scholarly journals Structural and photoluminescent studies of non-centrosymmetric manganese(II) N-(2-pyridylmethyl)-(L)-alanine) dicyanamide

2019 ◽  
Vol 10 (3) ◽  
pp. 267-272
Author(s):  
Bridget Ndoye Ndosiri ◽  
Katia Nchimi Nono ◽  
Paboudam Gbambie Awawou ◽  
Emmanuel Ngwang Nfor ◽  
Aminou Mohamadou ◽  
...  
Keyword(s):  
Solid State ◽  
Single Crystal ◽  
Elemental Analysis ◽  
Octahedral Coordination ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
Coordination Environment ◽  
Space Group ◽  
X Ray

The dinuclear compound, [Mn2(Pyala)2(Dca)2(H2O)]n·2H2O (1) (Pyala = N-(2-pyridylmethyl)-L-alanine and Dca = dicyanamide anion) has been synthesized and characterized by elemental analysis, IR and single crystal X-ray diffraction techniques. The crystal data for C22H26Mn2N10O6: orthorhombic, space group P212121 (no. 19), a = 10.3728(8) Å, b = 15.9780(12) Å, c = 16.3585(13) Å, V = 2711.2(4) Å3, Z = 4, T = 198(2) K, μ(MoKα) = 0.989 mm-1, Dcalc = 1.559 g/cm3, 129607 reflections measured (3.564° ≤ 2Θ ≤ 60.046°), 7923 unique (Rint = 0.0324, Rsigma = 0.0155) which were used in all calculations. The final R1 was 0.0169 (I > 2σ(I)) and wR2 was 0.0458 (all data). The obtained non-centrosymmetric dinuclear Mn(II) complex contains two unique Mn(II) cations with similar octahedral coordination environment. Photoluminescent measurements on the complex in the solid state show that it displays strong photoluminescence at 442 nm.

Crystal structures of (S)- and (R,S)-2,2′-bipyridine-3,3′-dicarboxylic acid 1,1′-dioxides and of their barium salts: absolute configuration and molecular distortion enforced by supramolecular self-assembly

1997 ◽  
Vol 212 (3) ◽  
Author(s):  
P. Vojtíšek ◽  
I. Císařová ◽  
J. Podlaha ◽  
Z. Žák ◽  
S. Böhm ◽  
...  
Keyword(s):  
Single Crystal ◽  
Dicarboxylic Acid ◽  
Crystal Structures ◽  
Absolute Configuration ◽  
Self Assembly ◽  
Barium Salt ◽  
X Ray Diffraction ◽  
X Ray

AbstractCrystal structures of the title compounds were determined by single crystal X-ray diffraction. Absolute configuration of the barium salt of (+)-(

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