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1.
A. V. Virovets S. N. Konchenko P. S. Yuferov D. Fenske 《Journal of Structural Chemistry》2004,45(3):496-501
The crystal structures of three cluster compounds: [(µ-H)Fe2Mo(µ3-Te)(CO)8Cp*], [FeMo2(µ3-Te)(CO)7x Cp*2], and [FeMoW(µ3-Te)(CO)7CpCp*], where Cp = 5-C5H5, Cp* = 5-C5 (CH3)5, have been investigated. In the cluster with a tetrahedral {FeMo2Te} core, one can observe positional isomerism of the carbonyl and cyclopentadienyl ligands with respect to the plane through the Fe and Te atoms and the center of the Mo2bond, resulting in two mirror isomers in the racemic crystal. In the cluster with the {FeMoWTe} core, additional chirality causes the formation of four diastereoisomers. Earlier, the structure of the [FeMoW(µ3-Se)(CO)7Cp] cluster with Mo and W atoms coordinated to identical Cp-ligands has been structurally defined. In this crystal, statistical disordering of Mo and W over the metal positions is observed. In the [FeMo(Cp*)W(Cp)(µ3-Te)(CO)7] cluster studied here, the Mo and W atoms are coordinated to different cyclopentadienyl ligands. Due to this, two of four diastereoisomers were isolated as ordered racemic crystals; the other two are nonexistent for steric reasons.Original Russian Text Copyright © 2004 by A. V. Virovets, S. N. Konchenko, P. S. Yuferov, and D. FenskeTranslated from Zhurnal Strukturnoi Khimii, Vol. 45, No. 3, pp. 522–527, May–June 2004. 相似文献
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Alexander V. Virovets Sergey N. Konchenko 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(9):e383-e384
The structure of the title compound, hexacarbonyl‐1κ3C,2κ3C‐[3(η5)‐cyclopentadienyl]bis(μ3‐selenido)diiron(II)cobalt(II),[CoFe2(μ3‐Se)2(C5H5)(CO)6], was redetermined at room temperature and the correct C2/c space group was assumed instead of the previously reported P space group [Mathur et al. (1995). Organometallics, 14 , 2115–2118]. Analysis of the literature data showed that the previously reported triclinic parameters correspond to a primitive subcell of the actual monoclinic C‐centred cell with cell dimensions close to those found by us. The title compound appeared to be isostructural with the sulfur–selenium analogue. 相似文献
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Taisiya S. Sukhikh Radmir M. Khisamov Sergey N. Konchenko 《Molecules (Basel, Switzerland)》2021,26(7)
We report a study of photoluminescent properties of 4-bromo-7-(3-pyridylamino)-2,1,3-benzothiadiazole (Py-btd) and its novel Lewis adducts: (PyH-btd)2(ZnCl4) and [Cu2Cl2(Py-btd)2{PPO}2]·2C7H8 (PPO = tetraphenyldiphosphine monoxide), whose crystal structure was determined by X-ray diffraction analysis. Py-btd exhibits a lifetime of 9 microseconds indicating its phosphorescent nature, which is rare for purely organic compounds. This phenomenon arises from the heavy atom effect: the presence of a bromine atom in Py-btd promotes mixing of the singlet and triplet states to allow efficient singlet-to-triplet intersystem crossing. The Lewis adducts also feature a microsecond lifetime while emitting in a higher energy range than free Py-btd, which opens up the possibility to color-tune luminescence of benzothiadiazole derivatives. 相似文献
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A. A. Pasynskii V. A. Grinberg S. N. Konchenko N. A. Pushkarevskii 《Russian Journal of Coordination Chemistry》2010,36(5):359-365
The electrochemical properties of sixteen tri- and tetranuclear chalcogenide-bridged heterometallic clusters in comparison
with the tetrahedral clusters Cp′4M4S4 (M = Cr, V; Cp′ = CH3C5H4) simulating ferredoxins were studied. For complexes with μ4-coordination of the chalcogen, only reduction processes involving the metal-heterometal bonds are reversible. For complexes
with μ3-coordination of the chalcogen, the oxidation processes are reversible except for triiron-chalcogen-pnicogenide clusters having
an easily and reversibly oxidizable E-Fe(CO)2C5H4Bu-t bond (E = Sb, Bi) at the pnicogen atom. The electron-compensating role of the lone pair at the bridging chalcogen atom in
the stabilization of the oxidation products of the clusters is discussed. 相似文献
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D. A. Bashirov N. V. Kuratieva A. I. Smolentsev S. N. Konchenko 《Journal of Structural Chemistry》2013,54(4):747-751
By X-ray diffraction study the structure of two new carbonyl cluster complexes of the composition [Fe4(μ4-Q)(μ4-AsMe)(CO)11], where Q = Se or Te, is determined. The structures are molecular, and the seleniumcontaining cluster complex crystallizes in the form of a solvate with toluene. 相似文献
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P. A. Petrov A. V. Virovets P. E. Plyusnin E. Yu. Filatov I. V. El’tsov Ya. Z. Voloshin S. N. Konchenko 《Russian Journal of Inorganic Chemistry》2014,59(10):1162-1167
A ribbed-monofunctionalized macrobicyclic iron(II) complex with tert-butyl sulfide substituents has been prepared via nucleophilic substitution of its dichloroclathrochelate precursor with tert-butylthiolate ion. This new complex has been characterized using elemental analysis, IR and multinuclear NMR spectroscopy, and the single crystal X-ray diffraction. Its thermal destruction occurs with release of isobutylene and polyunsaturated hydrocarbons giving iron borate, iron fluoropolyborate, and iron nitride as follows from combined thermal analysis and X-ray powder diffraction data. 相似文献