A new supramolecular compound of chrome(III): Synthesis, spectroscopic characterization, X-ray crystal structure, DFT, and solution studies

2010 ◽  
Vol 973 (1-3) ◽  
pp. 1-8 ◽  
Author(s):  
Hossein Eshtiagh-Hosseini ◽  
Zakieh Yousefi ◽  
Masoud Mirzaei ◽  
Ya-Guang Chen ◽  
S. Ali Beyramabadi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Spectroscopic Characterization ◽  
Supramolecular Compound ◽  
X Ray ◽  
Solution Studies ◽  
Chrome Iii

Darstellung, Reaktionen und spektroskopische Charakterisierung von [Os2X8]2-, X = Cl, Br, I, und Kristallstruktur von (PPN)2[Os2I8] · 2 CH2Cl2 / Preparation, Reactions and Spectroscopic Characterization of [Os2X8]2-, X = Cl, Br, I, and Crystal Structure of (PPN)2[Os2I8] · 2 CH2Cl2

1990 ◽  
Vol 45 (10) ◽  
pp. 1416-1424 ◽  
Author(s):  
W. Preetz ◽  
P. Hollmann ◽  
G. Thiele ◽  
H. Hillebrecht
Keyword(s):  
Crystal Structure ◽  
Structure Determination ◽  
Triple Bond ◽  
Room Temperature ◽  
Spectroscopic Characterization ◽  
Spectroscopic Constants ◽  
Monoclinic System ◽  
X Ray ◽  
Fine Structures

The triply bonded octahalogenodiosmate(III) anions [Os2X8]2-, previously known with X = Cl, Br, have now been extended to include the iodide with two staggered OsI4 units. This compound was prepared by treating [Os2Cl8]2- with Nal at room temperature in acetone solution. The structure determination by X-ray diffractometry on single crystals of (PPN)2[Os2I8] · 2 CH2Cl2, reveals crystallization in the monoclinic system, space group P21/c with Z = 4. The Os-Os triple bond is with 2.212(1) Å the longest within the three octahalogenodiosmates(III). The Raman spectra show ν(OsOs) at 285, [Os2Cl8]2-; at 287, [Os2Br8]2- and for the iodo compound at 270.1 cm-1 with up to three overtones. The spectroscopic constants are calculated to be ω1 = 270.9 cm-1; X11 = -0.50 cm-1. The 10 Κ UV-VIS spectra of solid [(n-C4H9)4N]2[Os2X8] exhibit δ-π* transitions with maxima at 723, 690 and 643 nm, superimposed by vibrational fine structures with long progressions of 195, 211 and 183 cm-1 for X = Cl, Br, I, respectively. Oxidation of [Os2X8]2-, X = Cl, Br with the corresponding halogen leads to the cleavage of the Os-Os bond, and the dekahalogenodiosmates(IV), [Os2X10]2-, are formed

Structural and IR-spectroscopic characterization of magnesium acesulfamate

2016 ◽  
Vol 71 (1) ◽  
pp. 51-55 ◽  
Author(s):  
Oscar E. Piro ◽  
Gustavo A. Echeverría ◽  
Beatriz S. Parajón-Costa ◽  
Enrique J. Baran
Keyword(s):  
Crystal Structure ◽  
Aqueous Solution ◽  
Elemental Analysis ◽  
Spectroscopic Characterization ◽  
Magnesium Carbonate ◽  
X Ray Diffraction ◽  
Triclinic Space Group ◽  
X Ray ◽  
Ir Spectroscopic

AbstractMagnesium acesulfamate, Mg(C4H4NO4S)2·6H2O, was prepared by the reaction of acesulfamic acid and magnesium carbonate in aqueous solution, and characterized by elemental analysis. Its crystal structure was determined by single crystal X-ray diffraction methods. The substance crystallizes in the triclinic space group P1̅ with one molecule per unit cell. The FTIR spectrum of the compound was also recorded and is briefly discussed. Some comparisons with other simple acesulfamate and saccharinate salts are also made.

scholarly journals Etazene (N,N-diethyl-2-{[(4-ethoxyphenyl)methyl]-1H-benzimidazol-1-yl}-ethan-1-amine (dihydrochloride)): a novel benzimidazole opioid NPS identified in seized material: crystal structure and spectroscopic characterization

2020 ◽  
Author(s):  
Marta Siczek ◽  
Marcin Zawadzki ◽  
Miłosz Siczek ◽  
Agnieszka Chłopaś-Konowałek ◽  
Paweł Szpot
Keyword(s):  
Crystal Structure ◽  
Analytical Data ◽  
Chemical Characterization ◽  
Drug Market ◽  
Spectroscopic Characterization ◽  
Illegal Drug ◽  
Spectroscopic Techniques ◽  
X Ray ◽  
Full Characterization

Abstract Purpose The aim of the study was to present the spectroscopic characteristics and crystal structure of the etazene—a benzimidazole opioid, which appeared on the illegal drug market in Poland in the last weeks. Methods The title compound was analyzed by X-ray crystallography as well as gas and liquid chromatography combined with mass spectrometry. Spectroscopic techniques have also been used, such as nuclear magnetic resonance, infrared and ultraviolet-visible spectroscopies. Results We presented the identification and the broad chemical characterization of etazene, a synthetic opioid that has recently been introduced on the illegal drug market. Conclusions In this paper, we described single-crystal X-ray, chromatographic and spectroscopic characterization of a synthetic opioid that emerged on the new psychoactive substance (NPS) market in Poland. To the best of our knowledge, this is the first full characterization of etazene. Analytical data presented in the work can be helpful in identification and detection of the NPS in forensic and clinical laboratories.

The synthesis, characterization, and some reactions of phosphonium thiolates and selenolates: the X-ray crystal structure of tetraphenylphosphonium 2,4,6-trimethy lbenzenethiolate

1989 ◽  
Vol 67 (4) ◽  
pp. 751-758 ◽  
Author(s):  
Joanne M. Ball ◽  
P. Michael Boorman ◽  
James F. Fait ◽  
A. Scott Hinman ◽  
Penelope J. Lundmark
Keyword(s):  
Crystal Structure ◽  
Spectroscopic Characterization ◽  
Synthetic Methods ◽  
X Ray ◽  
H Nmr ◽  
Iminium Salts ◽  
Irreversible Oxidation ◽  
Oxidation Wave ◽  
Ionic Nature ◽  
Halocarbon Solvents

Synthetic methods for the preparation of PPh4[SAr], PPN[SAr], and PPh4 [SeAr] (Ar = aryl; PPN = bis(triphenylphos-phine)iminium) salts are described, and 1H NMR, infrared, and 77Se NMR spectroscopic characterization is given. The X-ray crystal structure of [PPh4]Smes] (mes = 2,4,6-trimefhylbenzene) was carried out: space group [Formula: see text] a = 9.946(3) Å, b = 10.100(2) Å, c = 14.874(3) Å, α = 70.19(2)°, β = 69.13(2)°, γ = 82.54(2)°, Z = 2, R = 0.100, Rw = 0.074. The structure establishes the ionic nature of this compound in the solid state, and conductance measurements in acetonitrile are consistent with 1:1 electrolyte behaviour. It is shown, however, that solutions of the thiolates are quite sensitive to hydrolysis to the thiol, and also the strong nucleophilicity of the thiolate and selenolate anions enables them to react with halocarbon solvents. The selenolate solutions are extremely sensitive to oxidation to the diselenide, which limited their study. Cyclic voltammetry on selected thiolate salts shows that impurities quickly develop even in acetonitrile solvent, but comparisons with the voltammograms of thiols and disulphides confirm the assignment of an irreversible oxidation wave at ca. −0.3 V (vs. Ag/AgNO3, 0.01 M) to the process: 2SR− → R2S2 + 2e−. The potential at which this reaction occurs is related to the degree of substitution of the phenyl ring of the SAr− ion. Keywords: phosphonium thiolates, phosphonium selenolates, tetraphenylphosphonium 2,4,6-trimefhylbenzene thiolate.

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