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.

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.

Synthesis and Crystal Structures of Two Monomeric Zinc(II) Complexes Containing Carboxylate and Aqua Ligands

1997 ◽  
Vol 50 (8) ◽  
pp. 865 ◽  
Author(s):  
Xiao-Ming Chen ◽  
Xiao-Chun Huang ◽  
Ming-Liang Tong ◽  
Ye-Xiang Tong ◽  
Seik Weng Ng
Keyword(s):  
Structural Analysis ◽  
Single Crystal ◽  
Crystal Structures ◽  
Active Sites ◽  
Aqua Ligand ◽  
Zinc Atom ◽  
Tetrahedral Geometry ◽  
Distorted Tetrahedral Geometry ◽  
Carboxylate Groups ◽  
Crystal Structural

Two monomeric zinc(II) complexes of betaine (Me3N+CH2CO2¯ = bet), [Zn(bet)2(H2O)Cl] (ClO4) (1) and [Zn(bet)3(H2O)] (ClO4)2 (2), have been prepared and characterized by single-crystal structural analysis. The zinc atom in both complexes is coordinated in a distorted tetrahedral geometry: the zinc atom in complex (1) is surrounded by one aqua ligand (Zn–O 1·979(3) Å), one chloro ligand (Zn–Cl 2·218(1) Å ) and two monodentate carboxylate groups (Zn–O 1·946(2) Å); the zinc atom in complex (2) is ligated by one aqua ligand (Zn–O 1·997(6) Å) and three monodentate carboxylategroups (Zn–O 1·943(5)–2·106(8) Å). In both complexes, the aqua ligand forms strong donor hydrogenbonds with adjacent carboxylate oxygens (for complex (1), O · · · O is 2·689(2) Å; for complex (2), O · · · O are 2·67(1) and 2·709(8) Å); these interactions are discussed in the context of zinc complexesand enzyme active sites.

scholarly journals Synthesis, Crystal Structures, Hirshfeld Surfaces Analysis and Physico-Chemical Characterization of Two New ZnII and CdII Halidometallates

2021 ◽  
Author(s):  
ali rayes ◽  
Manel moncer ◽  
Irene Ara ◽  
Dege Necmi ◽  
Brahim Ayed
Keyword(s):  
Single Crystal ◽  
Crystal Structures ◽  
Chemical Characterization ◽  
Chair Conformation ◽  
Spectroscopic Techniques ◽  
X Ray Diffraction ◽  
X Ray ◽  
3 Dimensional ◽  
Physico Chemical ◽  
Ft Ir

Abstract Two new organic-inorganic hybrid materials, based on 1,3-CycloHexaneBis-(Methyl Amine), abbreviated CHBMA, namely(H2CHBMA)ZnCl4.2H2O (CP1) and (H2CHBMA)CdI4.2H2O (CP2), have been synthesized under mild conditions in acidic media and characterized by single-crystal X-ray diffraction, spectroscopic techniques (13C NMR, FT-IR, RAMAN) and thermal analysis. The crystal structures of the two compounds were solved by single-crystal X-ray diffraction methods. Both compounds show a 3-dimensional supramolecular structure directed by various interactions between tetrahalidometallate anions (ZnCl42-, CdI42-), water molecule and organic cations (H2CHBMA)2+. For both compounds, the cyclohexane ring of the template cation is in a chair conformation with the methyl-ammonium substituent in the equatorial positions and the two terminal ammonium groups in a cis conformation but with two different orientations (upward for CP1 and downward for CP2) which influences the supramolecular architecture of the two structures. Hirshfeld surface analysis and the associated two-dimensional finger print plots were used to explore and quantify the intermolecular interactions in the crystals.

Ion-bearing stairs: alkali metal complexes of 1,2-diaza-4-phospholide

2022 ◽  
Author(s):  
Minggang Zhao ◽  
Ru-Ru He ◽  
Tingting Xue ◽  
Jian-ping Ma ◽  
Wenjun Zheng
Keyword(s):  
Nmr Spectroscopy ◽  
Structural Analysis ◽  
Alkali Metal ◽  
Metal Complexes ◽  
Single Crystal ◽  
X Ray ◽  
Crystal Structural ◽  
Alkali Metal Complexes

Several of alkali metal complexes with 1,2-diaza-4-phospholide ligands were prepared and characterized by X-ray single crystal structural analysis and the NMR spectroscopy. Their structures showed varied coordination motifs: i) A...

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.

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.

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

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