scholarly journals Synthesis, Crystal Structure, and Characterization of Ternary Copper(II) Complex Derived from N-(salicylidene)-L-valine

2016 ◽  
Vol 2016 ◽  
pp. 1-4 ◽  
Author(s):  
Sundaramurthy Santha Lakshmi ◽  
Kannappan Geetha
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Oxygen Atom ◽  
Basal Plane ◽  
Carboxylate Group ◽  
Single Crystal Xrd ◽  
Pyramidal Geometry ◽  
Imine Nitrogen ◽  
Square Pyramidal Geometry

Ternary Schiff base copper(II) complex [CuL(tmpda)] (where H2L is N-(salicylidene)-L-valine; tmpda is N,N,N′,N′-tetramethyl-1,3-propanediamine) has been characterized by UV-Vis., FTIR, and single crystal XRD. The crystal structure displays a distorted square pyramidal geometry in which Schiff base is bonded to the Cu(II) ion via phenolate oxygen, imine nitrogen, and an oxygen atom of the carboxylate group through the basal plane and the chelating diamine, N,N,N′,N′-tetramethyl-1,3-propanediamine, displays an axial and equatorial mode of binding via NN-donor atoms.

Synthesis and photodynamic activities of a new metronidazole-appended porphyrin and its Zn(II) complex

2015 ◽  
Vol 19 (10) ◽  
pp. 1107-1113 ◽  
Author(s):  
Qiong Yu ◽  
Wei-Xia Xu ◽  
Ya-Hong Yao ◽  
Zeng-Qi Zhang ◽  
Shu Sun ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Crystal Structure ◽  
Oxygen Atom ◽  
Cancer Cells ◽  
Breast Cancer Cells ◽  
Porphyrin Ring ◽  
H Nmr ◽  
Pyramidal Geometry ◽  
Photodynamic Activity ◽  
Square Pyramidal Geometry

One novel porphyrin 5,10,15-tris(phenyl)-20-[4-(2-(2-methyl-5-nitro-imidazolyl)ethoxyl)phenyl] porphyrin and its zinc(II) metalloporphyrin were synthesized and characterized by IR, UV-vis, 1H NMR, MS and elemental analysis. The single crystal structure of zinc(II) porphyrin shows that the Zn(II) ion is coordinated with four nitrogen atoms of porphyrin ring and one oxygen atom of ethanol from axial, forming a five-coordinated square pyramidal geometry. Their cytotoxicity and photodynamic activity against breast cancer cells were studied. The results indicate that both of the porphyrins display high phototoxicity to the breast cancer cells with the negligible dark toxicity. In addition, the photodynamic activity of zinc(II) porphyrin was obviously higher than that of the free porphyrin.

Synthesis and characterization of durene-capped porphyrins and the crystal structure of a hemin derivative

1986 ◽  
Vol 64 (1) ◽  
pp. 208-212 ◽  
Author(s):  
Shantha David ◽  
David Dolphin ◽  
Brian R. James ◽  
John B. Paine III ◽  
Tilak P. Wijesekera ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Phenyl Group ◽  
The Other ◽  
Synthesis And Characterization ◽  
X Ray ◽  
Hydrophobic Cavity ◽  
Pyramidal Geometry ◽  
Porphyrin Core ◽  
Square Pyramidal Geometry

Sterically hindered porphyrins having a fully hydrophobic cavity have been prepared. The cavity is capped with a 2,3,5,6-tetramethylbenzene moiety containing at the 1,4-positions methylene —(CH2)n— chains (n = 4, 5, 7) bonded at trans pyrrole rings of a porphyrin that is alkylated with methyl or ethyl groups at the other β-pyrrolic positions. The iron(III) chloride derivative of the 4,4-durene-capped base has been obtained as single crystals, and subjected to X-ray structural analysis. The typical high spin, square pyramidal geometry of five-coordinate hemin chlorides is maintained; the porphyrin core is strongly distorted and there is no interaction between the phenyl group of the strap and the iron.

scholarly journals Formation of a macrocycle from dichlorodimethylsilane and a pyridoxalimine Schiff base ligand

2021 ◽  
Vol 77 (11) ◽  
Author(s):  
Uwe Böhme ◽  
Anke Schwarzer ◽  
Betty Günther
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Schiff Base ◽  
Nitrogen Atom ◽  
Oxygen Atom ◽  
Schiff Base Ligand ◽  
Silicon Compound ◽  
Asymmetric Unit ◽  
Imine Nitrogen ◽  
Imine Nitrogen Atom

The reaction of dichlorodimethylsilane with a polydentate Schiff base ligand derived from pyridoxal and 2-ethanolamine yielded the macrocyclic silicon compound (8E,22E)-4,4,12,18,18,26-hexamethyl-3,5,17,19-tetraoxa-8,13,22,27-tetraaza-4,18-disilatricyclo[22.4.0.010,15]octacosa-1(24),8,10,12,14,22,25,27-octaene-11,25-diol, C24H36N4O6Si2. The asymmetric unit contains the half macrocycle with an intramolecular O—H...N hydrogen bond between the imine nitrogen atom and a neighbouring oxygen atom. The crystal structure is dominated by C—H...O and C—H...π interactions, which form a high ordered molecular network.

Darstellung und Charakterisierung von Kupfer(II)-Derivaten des Glycyll-β-alanins und des β-Alanylglycins. Kristallstruktur von Cu(II)-ßAlaGly • H2O / Preparation and Characterization of Copper(II) Derivatives of Glycyl-β-alanine and β-Alanylglycine. Crystal Structure of Cu(II)-β-AlaGly • H2O

1993 ◽  
Vol 48 (3) ◽  
pp. 277-281
Author(s):  
Ralf Schmiedgen ◽  
Friedo Huber ◽  
Hans Preut
Keyword(s):  
Crystal Structure ◽  
Oxygen Atom ◽  
Carboxylate Group ◽  
Peptide Group ◽  
Orthorhombic Space Group ◽  
Apical Position ◽  
Lattice Constants ◽  
Carboxylate Groups ◽  
Derivatives Of

Aquacopper(II) glycyl-β-alaninate (1) and aquacopper(II)-β-alanylglycinate (2) were obtained from CuCO3 and the appropriate dipeptide under reflux in water. 2 crystallizes in the orthorhombic space group Pna2I. The lattice constants (291 K) are: a = 8.984(2), b = 12.456(2), c = 6.978(2) Å. The dipeptide anion, acting as a tridentate ONN ligand, and one oxygen atom of the carboxylate group of a neighbouring molecule form the base of a square pyramid around Cu, with water in the apical position. Cu is found slightly above the base. The molecules are connected by bridging carboxylate groups to form chains which are linked by hydrogen bonds between the water molecule and the oxygen atom of the peptide group.

Synthesis and crystal structure analyses of tri-substituted guanidine-based copper(II) complexes

2021 ◽  
Vol 76 (3-4) ◽  
pp. 193-199
Author(s):  
Muhammad Said ◽  
Sadia Rehman ◽  
Muhammad Ikram ◽  
Hizbullah Khan ◽  
Carola Schulzke
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Molecular Structures ◽  
Hydroxyl Groups ◽  
Synthesis And Crystal Structure ◽  
Pyramidal Geometry ◽  
Tautomeric Forms ◽  
Square Planar ◽  
Nitrogen Donor ◽  
Square Pyramidal Geometry

Abstract Three guanidine-derived tri-substituted ligands viz. N-pivaloyl-N′,N″-bis-(2-methoxyphenyl)guanidine (L1), N-pivaloyl-N′-(2-methoxyphenyl)-N″-phenylguanidine (L2) and N-pivaloyl-N′-(2-methoxyphenyl)-N″-(2-tolyl)guanidine (L3) were reacted with Cu(II) acetate to produce the corresponding complexes. The significance of the substituent on N″ for the resulting molecular structures and their packing in the solid state has been studied with respect to the structural specifics of the corresponding Cu(II) complexes. The key characteristic of the guanidine-based metal complexation with Cu(II) is the formation of an essentially square planar core with an N2O2 donor set. As an exception, in the complex of L1, the substituent’s methoxy moiety also interacts with the Cu(II) center to generate a square-pyramidal geometry. The hydroxyl groups of the imidic acid tautomeric forms of L1–L3, in addition to N″, are also bonded to Cu(II) in all three complexes rather than the nitrogen donor of the guanidine motif.

Synthesis, crystal structure and magnetic characterization of two Mn(III) chains with Schiff-base ligands

2013 ◽  
Vol 1033 ◽  
pp. 8-13 ◽  
Author(s):  
Cong-Ming Zhang ◽  
Xi-Feng Gao ◽  
Mei Zhu ◽  
Yun-Gai Li ◽  
Qing-Lun Wang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Schiff Base Ligands ◽  
Magnetic Characterization

Physico-chemical characterization of Cu2+-exchanged sepiolite

Clay Minerals ◽  
1985 ◽  
Vol 20 (4) ◽  
pp. 467-475 ◽  
Author(s):  
A. Corma ◽  
J. Pérez-Pariente ◽  
J. Soria
Keyword(s):  
Chemical Characterization ◽  
Tetrahedral Symmetry ◽  
Pyramidal Geometry ◽  
Physico Chemical ◽  
One Step ◽  
Lower Temperature ◽  
Coordinated Water ◽  
Square Pyramidal Geometry ◽  
Different Levels

AbstractCopper-sepiolites exchanged at different levels have been studied by ESR, IR, and TG. The results indicate that in the unheated samples the Cu2+ ions are located in octahedral edge positions. After dehydration, the Cu2+ ions occur in two positions with different environments. Some of the Cu2+ ions lose the two molecules of coordinated water in one step, at low dehydration temperatures, and adopt a square pyramidal geometry. Other Cu2+ ions lose the coordination water in two steps, at lower temperature than the natural sepiolite, and adopt a tetrahedral symmetry.

Synthesis, Crystal Structure and Antimicrobial Activity of Poly [bis-and#181;-3,5-dinitro-2-oxidobenzoato) (py) Cu II]

2020 ◽  
Vol 42 (6) ◽  
pp. 928-928
Author(s):  
Fouzia Chang Fouzia Chang ◽  
Najma Memon Najma Memon ◽  
Shahabuddin Memon Shahabuddin Memon ◽  
Muhammad Naeem Ahmed Muhammad Naeem Ahmed ◽  
Muhammad Nawaz Tahir Muhammad Nawaz Tahir ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Single Crystal ◽  
Room Temperature ◽  
Central Metal Atom ◽  
Central Metal ◽  
Single Crystal Xrd ◽  
Monoclinic System ◽  
X Ray ◽  
Pyramidal Geometry ◽  
Square Pyramidal Geometry

A novel Poly [bis-and#181;-3,5-dinitro-2-oxidobenzoato) (py) Cu II]/(C12H7CuN3O7) was synthesized by a self assemble method at room temperature. The molecular structure was determined by single-crystal X-ray analysis. The compound crystallizes in the monoclinic system, space group P 2 1/c with lattice parameters of a = 10.2143, b = 5.1651 and c = 26.608, α = 90, β = 99.720, γ = 90, Z = 4, V = 1383.60 (18) and#197;3.Pore size depicted from single crystal XRD data was 47and#197;. The central metal atom Cu (II) is coordinated with oxygen of carboxylates group and nitrogen atom of pyridine. The coordination polyhedron posses square pyramidal geometry is manifested by the N— Cu—O angle of 90o. The structure is composed of monomeric coordination units with the central copper (II) ion is not occupying a centre of symmetry.

Sign in / Sign up

Export Citation Format

Share Document