scholarly journals Syntheses and Crystal Structures of and

2010 ◽  
Vol 2010 ◽  
pp. 1-6 ◽  
Author(s):  
Takayoshi Fujii ◽  
Mihoko Kanno ◽  
Mitsuo Hirata
Keyword(s):  
Crystal Structures ◽  
Crystallographic Analysis ◽  
Planar Geometry ◽  
Distorted Tetrahedron ◽  
X Ray ◽  
Trinuclear Complexes ◽  
Square Planar

We have prepared the trinuclear complexes (3) and (4), from the reaction of with (1) and determined their structures by X-ray crystallographic analysis. In both complexes, two monoanions chelate the Cu(II) center in square-planar geometry, whereas the terminal Cu(II) center is four-coordinate and a distorted tetrahedron.

Bimetallomesogens: Synthesis and Mesomorphic Properties of Coppercomplexes of 3,3'-(2-hydroxypropane-1,3-diyl)bis(azan-1- yl-1-ylidene)bis(2-(4-alkoxyphenyl)prop-1-en-1-ol)

2010 ◽  
Vol 428-429 ◽  
pp. 140-143
Author(s):  
Chung Jung Chen ◽  
Chung K. Lai
Keyword(s):  
Copper Complexes ◽  
Crystallographic Analysis ◽  
Planar Geometry ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Square Planar ◽  
New Type ◽  
Optical Textures ◽  
Mesomorphic Properties

A new type of 3,3'-(2-hydroxypropane-1,3-diyl) bis(azan-1-yl-1-ylidene)bis(2-(4-alkoxy phenyl)prop-1-en-1-ol) and their copper complexes were prepared and mesomorphic properties characterized. The mesomorphic properties of these copper complexes were studied by differential scanning calorimetry (DSC), polarized optical microscopy (POM) and powder X-ray diffraction. X-ray structural crystallographic analysis showed that these bimetallic compounds have two copper centers coordinated with central square planar geometry. These molecules all have total two 1a or five alkoxy sidechains 1b appended around the central core. The mesomorphic behavior exhibited was found to be dependent on the sidechain density. All compounds in 1a exhibited smectic mesophases, however, compounds in 1b exhibited hexagonal columnar phases (Colh), which were characterized by optical textures and confirmed by powder x-ray diffraction.

scholarly journals Unprecedented Dinuclear CuII N,O-Donor Complex: Synthesis, Structural Characterization, Fluorescence Property, and Hirshfeld Analysis

Crystals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 607 ◽  
Author(s):  
Yin-Xia Sun ◽  
Ying-Qi Pan ◽  
Xin Xu ◽  
Yang Zhang
Keyword(s):  
Crystallographic Analysis ◽  
Hirshfeld Surface ◽  
Planar Geometry ◽  
Supramolecular Network ◽  
X Ray Diffraction ◽  
Tetragonal Pyramid ◽  
X Ray ◽  
Square Planar ◽  
Elemental Analyses ◽  
Hirshfeld Analysis

An unprecedented dinuclear CuII complex, [Cu2(L2)2], derived from a salamo-like chelating ligand H2L2, was produced by the cleavage of a newly synthesized, half-salamo-like ligand HL1 (2-[O-(1-ethyloxyamide)]oxime-3,5-dichloro-phenol). This was synthesized and characterized by elemental analyses, IR, UV–Vis and fluorescent spectra, single crystal X-ray diffraction analysis, and Hirshfeld surface analysis. X-ray crystallographic analysis indicated that the two CuII (Cu1 and Cu2) ions bore different (N2O3 and N2O2) coordination environments, the penta-coordinated Cu1 ion possessed a slightly twisted tetragonal pyramid geometry with the τ value τ = 0.004, and the tetra-coordinated Cu2 ion showed a slightly twisted square planar geometry. Interestingly, one oxime oxygen atom participated in the coordination reported previously. Moreover, an infinite two-dimensional layered supramolecular network was formed. Compared with HL1, the CuII complex possessed the characteristic of fluorescence quenching.

Synthesis, Crystal Structures and Characterization of a New Antitumor Cu(II) Complex with N-sulfonamide Ligand

2018 ◽  
Vol 69 (6) ◽  
pp. 1407-1410
Author(s):  
Adriana Corina Hangan ◽  
Alexandru Turza ◽  
Roxana Liana Stan ◽  
Luminita Simona Oprean
Keyword(s):  
Crystal Structure ◽  
Crystal Structures ◽  
Metal Ion ◽  
Planar Geometry ◽  
X Ray ◽  
Magnetic Methods ◽  
Square Planar ◽  
Ft Ir

A new Cu(II) complex with N-sulfonamide ligand, [Cu(N-(5-(4-methylphenyl)-[1,3,4]-thiadiazole-2-yl)-toluenesulfonamidate)4]((CH3)2NH2+)2(complex) has been synthesized and characterized. The X-ray crystal structure of the complex has been determined. The Cu(II) ion is four-coordinated, forming a CuN4 chromophore. The ligand acts as monodentate, coordinating the metal ion through a single Nthiadiazole atom. The complex has a square planar geometry. The characterization of the complex has been studied by FT-IR, electronic, EPR spectroscopic and magnetic methods.

Synthesis and Structural Characterisation of Palladium(II) Complexes with N,N′,N-Tridentate N′-Substituted N,N-Di(2-picolyl)amines and their Application to Methyl Methacrylate Polymerisation

2014 ◽  
Vol 67 (6) ◽  
pp. 953 ◽  
Author(s):  
Sunghoon Kim ◽  
Dongil Kim ◽  
Yujin Song ◽  
Ha-Jin Lee ◽  
Hyosun Lee
Keyword(s):  
Methyl Methacrylate ◽  
Crystallographic Analysis ◽  
Planar Geometry ◽  
Metal Centre ◽  
Ancillary Ligands ◽  
X Ray ◽  
Structural Characterisation ◽  
Square Planar ◽  
Ethanol Yields ◽  
Palladium Metal

The reaction of [Pd(CH3CN)2Cl2] with N′-substituted N,N-di(2-picolyl)amine-based ancillary ligands, for example N,N-di(2-picolyl)cyclohexylmethylamine (L1), N,N-di(2-picolyl)benzylamine (L2), N,N-di(2-picolyl)aniline (L3), and 1,4-bis[bis(2-pyridylmethyl)aminomethyl]benzene (L4), in the presence of NaClO4 in ethanol yields a new series of [(NN′N)PdCl]X (X = ClO4, Cl) complexes, i.e. mononuclear [LnPdCl]ClO4 (Ln = L1, L2, L3) and binuclear [L4Pd2Cl2]Cl2. X-Ray crystallographic analysis determined that the Pd atom in complexes [(NN′N)PdCl]X showed a slightly distorted square-planar geometry involving three nitrogen atoms and a chlorido ligand. Moreover, the unit cell included a ClO4– or Cl– anion as the counterion. The complex [L1PdCl]ClO4 showed the highest catalytic activity for the polymerisation of methyl methacrylate in the presence of modified methylaluminoxane at 60°C among the mononuclear PdII complexes. Specifically, the activity of binuclear [L4Pd2Cl2]Cl2 was 2-fold higher than the corresponding mononuclear [L2PdCl]ClO4 per active palladium metal centre.

scholarly journals Crystal structures of [Mn(bdc)(Hspar)2(H2O)0.25]·2H2O containing MnO6+1capped trigonal prisms and [Cu(Hspar)2](bdc)·2H2O containing CuO4squares (Hspar = sparfloxacin and bdc = benzene-1,4-dicarboxylate)

2016 ◽  
Vol 72 (1) ◽  
pp. 96-101
Author(s):  
Zhe An ◽  
Jing Gao ◽  
William T. A. Harrison
Keyword(s):  
Hydrogen Bonds ◽  
Water Molecule ◽  
Crystal Structures ◽  
Metal Ion ◽  
Three Dimensional ◽  
Trigonal Prism ◽  
Planar Geometry ◽  
Cationic Complex ◽  
Counter Ion ◽  
Square Planar

The syntheses and crystal structures of 0.25-aqua(benzene-1,4-dicarboxylato-κ2O,O′)bis(sparfloxacin-κ2O,O′)manganese(II) dihydrate, [Mn(C8H4O4)(C19H22F2N4O3)2(H2O)0.25]·2H2O or [Mn(bdc)(Hspar)2(H2O)0.25]·2H2O, (I), and bis(sparfloxacin-κ2O,O′)copper(II) benzene-1,4-dicarboxylate dihydrate, [Cu(C19H22F2N4O3)2](C8H4O4)·2H2O or [Cu(Hspar)2](bdc)·2H2O, (II), are reported (Hspar = sparfloxacin and bdc = benzene-1,4-dicarboxylate). The Mn2+ion in (I) is coordinated by twoO,O′-bidentate Hspar neutral molecules (which exist as zwitterions) and anO,O′-bidentate bdc dianion to generate a distorted MnO6trigonal prism. A very long bond [2.580 (12) Å] from the Mn2+ion to a 0.25-occupied water molecule projects through a square face of the prism. In (II), the Cu2+ion lies on a crystallographic inversion centre and a CuO4square-planar geometry arises from its coordination by twoO,O′-bidentate Hspar molecules. The bdc dianion acts as a counter-ion to the cationic complex and does not bond to the metal ion. The Hspar ligands in both (I) and (II) feature intramolecular N—H...O hydrogen bonds, which closeS(6) rings. In the crystals of both (I) and (II), the components are linked by N—H...O, O—H...O and C—H...O hydrogen bonds, generating three-dimensional networks.

scholarly journals Reaction with Proteins of a Five-Coordinate Platinum(II) Compound

2019 ◽  
Vol 20 (3) ◽  
pp. 520 ◽  
Author(s):  
Giarita Ferraro ◽  
Tiziano Marzo ◽  
Maria Cucciolito ◽  
Francesco Ruffo ◽  
Luigi Messori ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Platinum Complexes ◽  
Rnase A ◽  
Side Chain ◽  
Planar Geometry ◽  
Ionization Mass ◽  
X Ray ◽  
X Ray Crystallography ◽  
Egg White Lysozyme ◽  
Square Planar

Stable five-coordinate Pt(II) complexes have been highlighted as a promising and original platform for the development of new cytotoxic drugs. Their interaction with proteins has been scarcely studied. Here, the reactivity of the five-coordinate Pt(II) compound [Pt(I)(Me) (dmphen)(olefin)] (Me = methyl, dmphen = 2,9-dimethyl-1,10-phenanthroline, olefin = dimethylfumarate) with the model proteins hen egg white lysozyme (HEWL) and bovine pancreatic ribonuclease (RNase A) has been investigated by X-ray crystallography and electrospray ionization mass spectrometry. The X-ray structures of the adducts of RNase A and HEWL with [Pt(I)(Me)(dmphen)(olefin)] are not of very high quality, but overall data indicate that, upon reaction with RNase A, the compound coordinates the side chain of His105 upon releasing the iodide ligand, but retains the pentacoordination. On the contrary, upon reaction with HEWL, the trigonal bi-pyramidal Pt geometry is lost, the iodide and the olefin ligands are released, and the metal center coordinates the side chain of His15 probably adopting a nearly square-planar geometry. This work underlines the importance of the combined use of crystallographic and mass spectrometry techniques to characterize, in detail, the protein–metallodrug recognition process. Our findings also suggest that five-coordinate Pt(II) complexes can act either retaining their uncommon structure or functioning as prodrugs, i.e., releasing square-planar platinum complexes as bioactive species.

scholarly journals Metal Complexes of π-Expanded Ligand (7): Syntheses, Structures and Properties of Pt(II) Complexes Containing the Isomeric 1- and 2-Alkyliminomethyl Pyrene Ligands

Crystals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 476 ◽  
Author(s):  
Xuan-Dien Luong ◽  
Xuan-Truong Nguyen
Keyword(s):  
Molecular Structure ◽  
Planar Geometry ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pt Complex ◽  
Physico Chemical ◽  
Clear Explanation ◽  
Square Planar ◽  
Structures And Properties ◽  
The Relationship

A [O,N] bidentate π-expanded ligand system, (E)-1-(n-octylimino)methylpyren-2-ol (2), was newly synthesized via a six-step synthesis from pyrene. The ligand 2 reacts with [PtCl2(PhCN)2] in chlorobenzene and the presence of a base at reflux for 2 h under the formation of (2(Pt)) complex with a yield of 70%. The molecular structure of (2(Pt)), studied by common spectroscopic methods and X-ray diffraction, shows a square planar geometry with a trans-configuration of the ligands. The molecular structure, absorption spectra, electrochemical properties, and phosphorescence characteristics of the (2(Pt)) complex are discussed, emphasizing the comparison with those of the previously reported Pt complex (1(Pt)) containing the isomeric ligands of 2, (E)-2-(n-octylimino)methylpyren-1-ol. The DFT calculations of the two Pt complexes are carried out and exhibit a clear explanation of the relationship between their physico-chemical characteristics.

Imidazole/benzimidazole-modified cyclotriphosphazenes as highly selective fluorescent probes for Cu2+: synthesis, configurational isomers, and crystal structures

2017 ◽  
Vol 46 (28) ◽  
pp. 9140-9156 ◽  
Author(s):  
Aylin Uslu ◽  
Süreyya Oğuz Tümay ◽  
Ahmet Şenocak ◽  
Fatma Yuksel ◽  
Elif Özcan ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Fluorescent Probes ◽  
Copper Ion ◽  
Crystallographic Analysis ◽  
Ion Detection ◽  
X Ray

We present a comprehensive work and discuss the fluoroprobe properties of synthesized compounds for copper ion detection with a stereochemical approach using X-ray crystallographic analysis results.

Tetrahalogenotellurate(II): Synthese und Kristallstrukturen von Verbindungen mit den Ionen TeX42- (X = Cl, Br, I)/Tetrahalotellurates(II): Syntheses and Crystal Structures of Compounds with TeX42- Ions (X = Cl, Br, I)

1985 ◽  
Vol 40 (2) ◽  
pp. 251-257 ◽  
Author(s):  
Siegfried Pohl ◽  
Wolfgang Saak ◽  
Bernt Krebs
Keyword(s):  
Single Crystal ◽  
Crystal Structures ◽  
Acetonitrile Solution ◽  
Monoclinic Space Group ◽  
Space Group ◽  
X Ray ◽  
Bond Lengths ◽  
Square Planar

Abstract The compounds [(C6H5)4As]2 TeCl4 (1), [(C2H5)4 N]2 TeBr4 · CH3CN (2), and [(C2H5)4N]2TeI4 (3) were prepared by the reaction of Te, X2 , and excess (C2H5)4NX (X = Br, I) in acetonitrile solution or by heating of [(C6H5)4 As]2TeCl6 , Te, and (C6H5)4 ASCl for several hours in the same solvent.The structures of 1-3 were determined from single crystal X-ray data.1 crystallizes in the monoclinic space group P21/n with a = 1061.8(2), b = 1614.2(3), c = 1341.7(3) pm, β = 94.21° and Z = 2; 2: tetragonal, P4/mmm, a = 1039.7(2), c = 690.5(1), Z = 1; 3: tetragonal, I4/mmm, a = 1061.7(2), c = 1342.8(4), Z = 2. In 1-3 Te(II) exhibits a square planar coordination. The Te -CI, Te -Br, and Te-I bond lengths were found to be 260.7 (mean), 275.3, and 298.5 pm, respectively.

An Unusual Cleavage and Macrocyclization in the Zinc-Aqueous Acid Reduction of [2-Methyl-2-Nitro-N,N'-Bis(Pyridin-2-Ylmethyl)-Propane-1,3-Diamine]Coppe R(II) Cation - Crystal-Structure of the (6,13-Dimethyl-1,4,8,11-Tetraazacyclotetradecane-6,13-Diamine)Copper(II) Perchlorate Product

1986 ◽  
Vol 39 (7) ◽  
pp. 1101 ◽  
Author(s):  
GA Lawrance ◽  
BW Skelton ◽  
AH White ◽  
P Comba
Keyword(s):  
Catalytic Reduction ◽  
Electronic Spectroscopy ◽  
Major Product ◽  
Planar Geometry ◽  
X Ray ◽  
Aqueous Acid ◽  
Square Planar ◽  
Spin Resonance ◽  
Unusual Cleavage ◽  
Acid Reduction

Reduction of [2-methyl-2-nitro-N,N?-bis(pyridin-2-ylmethyl)propane- 1,3-diamine]copper(II) with zinc in aqueous hydrochloric acid and subsequent recomplexation yields the macromonocyclic complex (6,13-dimethyl-1,4,8,11-tetraazacyclotetradecane-6,13-diamine)copper(II) perchlorate as the major product, apparently by cleavage of both pyridine rings from the precursor ligand and direct recombination of two saturated residues. Catalytic reduction of the nitro group in the precursor compound can be achieved cleanly over palladium-carbon with hydrogen. The macrocyclic complex crystallized in the space group P21/c, a 8.031(4), b 17.45(1), c 8.436(5) Ǻ, β 117.87(4)°, Z 2; for a single-crystal X-ray structure determination R was 0.078 for 1378 'observed' reflections. The complex is centrosymmetric, the macrocycle having pendant amines on opposite sides of the macrocyclic plane, while perchlorate oxygen atoms occupy the axial sites with Cu-O at 2.59 Ǻ. Observed Cu-N distances of 2.022(6) and 1.996(7) Ǻ are longer than usual for copper(II) amines. Electron spin resonance and electronic spectroscopy define an essentially square-planar geometry in solution, with only weak axial interactions.

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