Fluoride as a terminal and bridging ligand for copper: isolation and x-ray crystallographic characterization of copper monomeric and dimeric complexes [CuII(TMPA)F]nn+ (n = 1 or 2; TMPA = tris[(2-pyridyl)methyl]amine)

1991 ◽  
Vol 30 (9) ◽  
pp. 2035-2040 ◽  
Author(s):  
Richard R. Jacobson ◽  
Zoltan. Tyeklar ◽  
Kenneth D. Karlin ◽  
Jon. Zubieta
Keyword(s):  
X Ray ◽  
Bridging Ligand ◽  
Methyl Amine ◽  
Dimeric Complexes

scholarly journals Magnesium and Nickel Complexes with Bis(p-iminoquinone) Redox-Active Ligand

2021 ◽  
Vol 47 (5) ◽  
pp. 307-318
Author(s):  
I. N. Meshcheryakova ◽  
O. Yu. Trofimova ◽  
N. O. Druzhkov ◽  
K. I. Pashanova ◽  
I. A. Yakushev ◽  
...  
Keyword(s):  
Solid Phase ◽  
Nickel Complexes ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bridging Ligand ◽  
Redox Active Ligand ◽  
Active Ligand ◽  
Redox Active ◽  
Dimeric Complexes ◽  
Poorly Soluble

Abstract Poorly soluble in the most part of organic solvents dimeric complexes $${\text{M}}{{{\text{g}}}_{{\text{2}}}}{\text{L}}_{2}^{2}$$·4DMF (I) and $${\text{N}}{{{\text{i}}}_{{\text{2}}}}{\text{L}}_{2}^{2}$$·4DMF (II) (L is 4,4'-(1,4-phenylenebis(azanylylidene))bis(3,6-di-tert-butyl-2-hydroxycyclohexa-2,5-dien-1-one dianion)) are synthesized by the reactions of magnesium and nickel acetates with the ditopic redox-active ligand of the hydroxy-para-iminoquinone type in a DMF solution. The molecular and crystal structures of the synthesized compounds are determined by X-ray diffraction analysis (CIF files CCDC nos. 2045665 (I) and 2045666 (II·3DMF)). The thermal stability is studied by thermogravimetry. The redox-active character of the organic bridging ligand in the dimeric complexes $${\text{M}}{{{\text{g}}}_{{\text{2}}}}{\text{L}}_{2}^{2}$$·4DMF and $${\text{N}}{{{\text{i}}}_{{\text{2}}}}{\text{L}}_{2}^{2}$$·4DMF is confirmed by the data of solid-phase electrochemistry.

Characterization of Mercury(II) Complexes of Bis[(2-pyridyl)methyl]amine by X-ray Crystallography and NMR Spectroscopy

1998 ◽  
Vol 37 (12) ◽  
pp. 2952-2959 ◽  
Author(s):  
Deborah C. Bebout ◽  
Anne E. DeLanoy ◽  
David E. Ehmann ◽  
Margaret E. Kastner ◽  
Damon A. Parrish ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
X Ray ◽  
X Ray Crystallography ◽  
Methyl Amine

scholarly journals Synthesis and structural analysis of polynuclear silver(I) complexes with 4,7-phenanthroline

2019 ◽  
Vol 84 (7) ◽  
pp. 689-699 ◽  
Author(s):  
Ivana Stanojevic ◽  
Nada Savic ◽  
Aurélien Crochet ◽  
Katharina Fromm ◽  
Milos Djuran ◽  
...  
Keyword(s):  
Solid State ◽  
Room Temperature ◽  
Volume Ratio ◽  
Spectroscopic Techniques ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bridging Ligand ◽  
Coordination Sites ◽  
Hydrolysis Of

New polynuclear silver(I) complexes, [Ag(CF3SO3)(4,7-phen)(CH3CN)]n (1) and [Ag(PO2F2)(4,7-phen)]n (2), were synthesized by the reaction of 4,7-phenanthroline (4,7-phen) and the corresponding AgX salt (X = CF3SO3 - and PF6 -) in 1:2 mole ratio, respectively, in methanol/acetone (1:1 volume ratio) at room temperature. The characterization of the complexes was established on the basis of elemental microanalysis, IR and NMR (1H and 13C) spectroscopic techniques, while their crystal structures were determined by single-crystal X-ray diffraction analysis. The results of spectroscopic and crystallographic analyses revealed that in these complexes, 4,7-phen behaves as a bridging ligand between two metal ions, while the remaining coordination sites of the Ag(I) ions are occupied by the oxygen atom of CF3SO3 - and an acetonitrile nitrogen atom in 1 or by two oxygen atoms from two PO2F2 -, formed after hydrolysis of PF6 -, in 2. In the solid state, both complexes are coordination polymers in which the geometry around the Ag(I) ions is distorted tetrahedral.

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

2017 ◽  
Vol 72 (1) ◽  
pp. 83-87 ◽  
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.

scholarly journals Synthesis and Characterization of [Fe(picolinate)3][MnNi(oxalate)3].CH3OH Polymeric Complex

2014 ◽  
Vol 14 (3) ◽  
pp. 311-314 ◽  
Author(s):  
Fahimah Martak ◽  
Djulia Onggo ◽  
Ismunandar Ismunandar ◽  
Agung Nugroho
Keyword(s):  
Absorption Spectrometry ◽  
Polymeric Complex ◽  
Monoclinic Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bridging Ligand ◽  
Paramagnetic Behavior ◽  
Crystalline Product ◽  
Oxalate Ligand

Polymeric complex [Fe(picolinate)3][MnNi(oxalate)3].CH3OH has been successfully synthesized using H-tube technique. The chemical composition of the synthesized product was determined by Elemental Analysis and Atomic Absorption Spectrometry. Infrared spectrum shows that the oxalate ligand acts as a bridging ligand. The crystalline product exists in the form of monoclinic structure and space group P21n as shown on the pattern of X-Ray Diffraction and has a similar structure with [Fe(bpp)2][MnCr(oxalate)3] complex. The magnetic susceptibility of the polymeric complex exhibits high spin and paramagnetic behavior.

The Use of Advanced Analytical Techniques for Characterization of the Chemical, Physical, and Crystallographic Nature of a Surface

1973 ◽  
Vol 31 ◽  
pp. 132-133 ◽  
Author(s):  
R. E. Herfert
Keyword(s):  
Surface Characterization ◽  
Analytical Techniques ◽  
X Ray Diffraction ◽  
Depth Of Penetration ◽  
X Ray ◽  
The Past ◽  
Transmission Electron ◽  
Scanning Electron

Studies of the nature of a surface, either metallic or nonmetallic, in the past, have been limited to the instrumentation available for these measurements. In the past, optical microscopy, replica transmission electron microscopy, electron or X-ray diffraction and optical or X-ray spectroscopy have provided the means of surface characterization. Actually, some of these techniques are not purely surface; the depth of penetration may be a few thousands of an inch. Within the last five years, instrumentation has been made available which now makes it practical for use to study the outer few 100A of layers and characterize it completely from a chemical, physical, and crystallographic standpoint. The scanning electron microscope (SEM) provides a means of viewing the surface of a material in situ to magnifications as high as 250,000X.

High Resolution Replication of Organoclay Surfaces

1982 ◽  
Vol 40 ◽  
pp. 576-577
Author(s):  
W. W. Barker ◽  
W. E. Rigsby ◽  
V. J. Hurst ◽  
W. J. Humphreys
Keyword(s):  
Clay Mineral ◽  
Organic Molecule ◽  
Organic Molecules ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Naturally Occurring ◽  
Silicate Layers ◽  
Mineral Identification

Experimental clay mineral-organic molecule complexes long have been known and some of them have been extensively studied by X-ray diffraction methods. The organic molecules are adsorbed onto the surfaces of the clay minerals, or intercalated between the silicate layers. Natural organo-clays also are widely recognized but generally have not been well characterized. Widely used techniques for clay mineral identification involve treatment of the sample with H2 O2 or other oxidant to destroy any associated organics. This generally simplifies and intensifies the XRD pattern of the clay residue, but helps little with the characterization of the original organoclay. Adequate techniques for the direct observation of synthetic and naturally occurring organoclays are yet to be developed.

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