scholarly journals Mononuclear and Dinuclear Manganese(II) Complexes from the Use of Methyl(2-pyridyl)ketone Oxime

2010 ◽  
Vol 2010 ◽  
pp. 1-9 ◽  
Author(s):  
Constantinos G. Efthymiou ◽  
Vassilios Nastopoulos ◽  
Catherine Raptopoulou ◽  
Anastasios Tasiopoulos ◽  
Spyros P. Perlepes ◽  
...  
Keyword(s):  
Single Crystal ◽  
Organic Ligand ◽  
Dinuclear Complex ◽  
X Ray Diffraction ◽  
X Ray

The reactions of methyl(2-pyridyl)ketone oxime, (py)C(Me)NOH, with manganese(II) sulfate monohydrate have been investigated. The reaction between equimolar quantities ofMnSO4⋅H2Oand (py)C(Me)NOH inH2Olead to the dinuclear complex[Mn2(SO4)2{(py)C(Me)NOH}4]⋅(py)C(Me)NOH,1⋅(py)C(Me)NOH, while employment of NaOMe as base affords the compound[Mn(HCO2)2{(py)C(Me)NOH}2](2). The structures of both compounds have been determined by single crystal X-ray diffraction. In both complexes, the organic ligand chelates through its nitrogen atoms. The IR data are discussed in terms of the nature of bonding and the structures of the two complexes.

scholarly journals Synthesis and structure of macrocyclic dinickel(II) complex with 5-(4-pyridyl)tetrazolate as coligand

2021 ◽  
pp. 3-10
Author(s):  
Sergei V. Voitekhovich ◽  
Berthold Kersting ◽  
Oleg A. Ivashkevich
Keyword(s):  
Ir Spectroscopy ◽  
Single Crystal ◽  
Elemental Analysis ◽  
Dinuclear Complex ◽  
X Ray Diffraction ◽  
X Ray

The dinuclear nickel(II) complex [Ni2LmClO4] + , where Lm represents a 24-membered macrocyclic hexaaza-dithiophenolate ligand, reacts with 5-(4-pyridyl)tetrazole (PyrCN4H) to give the dinuclear complex [Ni2Lm(PyrCN4)]+ . The new complex was both isolated as perchlorate or tetraphenylborate salts and characterised by elemental analysis and IR spectroscopy. The structure of [Ni2Lm(PyrCN4)]BPh4 ⋅ MeCN was determined by single crystal X-ray diffraction, showing that tetrazolate units are in a N2,N3-bridging mode to generate dioctahedral N3Ni(µ-S)2(µ-N4CPyr)NiN3 core.

scholarly journals 4- and 5-Coordinate Dinuclear Copper(II) Complexes with the Tetraacetylethanediide and an N-Alkylated Diamine or a Triamine

1995 ◽  
Vol 50 (4) ◽  
pp. 536-544 ◽  
Author(s):  
Hide Kambayashi ◽  
Junko Yuzurihara ◽  
Yuichi Masuda ◽  
Hiroko Nakagawa ◽  
Wolfgang Linert ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Esr Spectra ◽  
Crystal Structure Analysis ◽  
Dinuclear Complex ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Dinuclear Copper ◽  
X Ray ◽  
Final Agreement

Six dinuclear copper(II) complexes have been prepared, Cu2(taet)(plam)2X2 where taet = 1,1,2,2-tetraacetylethanediide, plam = N-alkylated polyamine such as tmen = N,N,N′,N′-tetramethylethylenediamine or pmdt = N,N,N′,N′,N′-pentamethyldiethylenetriamine, X = a monovalent anion such as ClO4- , NO3- or Cl-. These complexes are classified into two categories from the results of electronic spectra, IR spectra, and X-ray single crystal structure analysis as follows: (1) 4-coordinate-4-coordinate dinuclear, [Cu2(taet)(tmen)2]X2 (where X = ClO4- or NO3-), (2) 5-coordinate-5-coordinate dinuclear, [Cu2(taet)(tmen)2Cl2], and [Cu2(taet)(pmdt)2]X2 (where X = ClO4-, NO3- , or Cl- ). The crystal structure of Cu2(taet)(tmen)2(ClO4)2 · H2O (1) has been determined by the single crystal X-ray diffraction technique; monoclinic space group P21/a with a = 26.478(3), b = 8.744(1), c = 15.601(3) Å, β = 106.195(9)°, and V = 3468.9(8) Å3 for Z = 4. The final agreement factors are R = 0.097 ( Rw = 0.099). The geometry of each Cu(II) moiety in the dinuclear cation (1) is 4-coordinate square planar with a N2O2 donor set. This tmen-dinuclear complex exhibits a very weak C u (II)-Cu (II) interaction (J = -0.5 cm-1), and shows characteristic ESR spectra with seven hyperfine peaks in 1,2-dichloroethane solution at room temperature. This is not found for the corresponding pmdt-dinuclear complex. All complexes obtained in this study are very soluble in many organic solvents. The tmen-dinuclear complexes show pronounced solvatochromic behavior-dependent on the solvent donor properties. This is not found for the corresponding pmdt-dinuclears, which are stable as 5-coordinated species.

Unusual motion of n-methoxypropyl moiety observed in the photochromic crystals of an organorhodium dithionite complex with n-methoxypropyltetramethylcyclopentadienyl ligands

2021 ◽  
Author(s):  
Yuu Kajiwara ◽  
Seiya Miyata ◽  
Hidetaka Nakai
Keyword(s):  
Single Crystal ◽  
Conformational Change ◽  
Crystalline State ◽  
Dinuclear Complex ◽  
X Ray Diffraction ◽  
X Ray

Crystalline-state photochromism of a new organorhodium dinuclear complex having n-methoxypropyltetramethylcyclopentadienyl (η-C5Me4n-C3H6OCH3) and photoresponsive dithionite (μ-O2SSO2) ligands was investigated directly by performing single crystal X-ray diffraction experiments; reversible conformational change of...

[Cu40Se16(S-C6H4-CN)8(dppm)8]: A Disc-like Copper Cluster with a Nitrile-functionalized Ligand Shell

2013 ◽  
Vol 68 (5-6) ◽  
pp. 575-580 ◽  
Author(s):  
Robert Langer ◽  
Dieter Fenske ◽  
Olaf Fuhr
Keyword(s):  
Ir Spectroscopy ◽  
Single Crystal ◽  
Organic Ligand ◽  
Close Packing ◽  
Stacking Sequence ◽  
Copper Cluster ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ligand Shell ◽  
Copper Chalcogenide

The new copper chalcogenide cluster [Cu40Se16(S-C6H4-CN)8(dppm)8] (1) with nitrile groups in the organic ligand shell has been synthesized and characterized by single-crystal X-ray diffraction and IR spectroscopy. The arrangement of the chalcogen atoms in 1 is similar to a close packing and is best described as two parallel layers with an ab stacking sequence. The resulting structure is a rare example of a disc-like cluster molecule

Reactions of Nickel (II) Sulfate Hexahydrate with Methyl(2-pyridyl)ketone Oxime: Two Mononuclear Sulfato Complexes Containing the Neutral Ligand

2007 ◽  
Vol 62 (9) ◽  
pp. 1123-1132 ◽  
Author(s):  
Constantina Papatriantafyllopoulou ◽  
Catherine P. Raptopoulou ◽  
Aris Terzis ◽  
Jozef F. Janssens ◽  
Spyros P. Perlepes ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Single Crystal ◽  
Organic Ligand ◽  
Mononuclear Complex ◽  
Neutral Ligand ◽  
X Ray Diffraction ◽  
Monodentate Ligand ◽  
Sulfate Anion ◽  
X Ray ◽  
Sulfato Complexes

The reactions of methyl(2-pyridyl)ketone oxime, (py)C(Me)NOH, with nickel(II) sulfate hexahydrate, in the absence of an external base, have been investigated. The reaction between equimolar quantities of NiSO4 ·6 H2O and (py)C(Me)NOH in H2O leads to the mononuclear complex [Ni(SO4){(py)C(Me)NOH}(H2O)3] ·H2O (1 ·H2O), while an excess of the organic ligand affords the 1 : 2 compound [Ni(SO4){(py)C(Me)NOH}2(H2O)] ·H2O (2 ·H2O). The structures of both compounds have been determined by single crystal X-ray diffraction. In both complexes the organic ligand chelates through its nitrogen atoms and the sulfate anion acts as a monodentate ligand. The thermal decomposition of complexes 1 ·H2O and 2 ·H2O has been studied. The IR data are discussed in terms of the nature of bonding and the structures of the two complexes.

Electron Microscopy of Shock Loaded Polycrystalline Beryllium

1974 ◽  
Vol 32 ◽  
pp. 506-507 ◽  
Author(s):  
J. M. Galbraith ◽  
L. E. Murr ◽  
A. L. Stevens
Keyword(s):  
Electron Microscopy ◽  
Wave Propagation ◽  
Structural Change ◽  
Single Crystal ◽  
Diffraction Pattern ◽  
Shock Loading ◽  
Slip Systems ◽  
Compression Tests ◽  
X Ray Diffraction ◽  
X Ray

Uniaxial compression tests and hydrostatic tests at pressures up to 27 kbars have been performed to determine operating slip systems in single crystal and polycrystal1ine beryllium. A recent study has been made of wave propagation in single crystal beryllium by shock loading to selectively activate various slip systems, and this has been followed by a study of wave propagation and spallation in textured, polycrystal1ine beryllium. An alteration in the X-ray diffraction pattern has been noted after shock loading, but this alteration has not yet been correlated with any structural change occurring during shock loading of polycrystal1ine beryllium.This study is being conducted in an effort to characterize the effects of shock loading on textured, polycrystal1ine beryllium. Samples were fabricated from a billet of Kawecki-Berylco hot pressed HP-10 beryllium.

Crystal structure of an inclusion complex between chiral monoaza-15-crown-5 and S(–)-1-phenyl-ethyl ammonium percholorate

2003 ◽  
Vol 218 (5) ◽  
Author(s):  
Süheyla Özbey ◽  
F. B. Kaynak ◽  
M. Toğrul ◽  
N. Demirel ◽  
H. Hoşgören
Keyword(s):  
Crystal Structure ◽  
Inclusion Complex ◽  
Single Crystal ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
New Type

AbstractA new type of inclusion complex, S(–)-1 phenyl ethyl ammonium percholorate complex of R-(–)-2-ethyl - N - benzyl - 4, 7, 10, 13 - tetraoxa -1- azacyclopentadecane, has been prepared and studied by NMR, IR and single crystal X-ray diffraction techniques. The compound crystallizes in space group

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