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1.
Michael Müller Prof. Dr. Markus Albrecht Verena Gossen Tanja Peters Andreas Hoffmann Prof. Dr. Gerhard Raabe Dr. Arto Valkonen Prof. Kari Rissanen 《Chemistry (Weinheim an der Bergstrasse, Germany)》2010,16(41):12446-12453
The directionality of interaction of electron‐deficient π systems with spherical anions (e.g,. halides) can be controlled by secondary effects like NH or CH hydrogen bonding. In this study a series of pentafluorophenyl‐substituted salts with polyhalide anions is investigated. The compounds are obtained by aerobic oxidation of the corresponding halide upon crystallization. Solid‐state structures reveal that in bromide 2 , directing NH–anion interactions position the bromide ion in an η1‐type fashion over but not in the center of the aromatic ring. The same directing forces are effective in corresponding tribromide salt 3 . In the crystal, the bromide ion is paneled by four electron‐deficient aromatic ring systems. In addition, compounds 4 and 6 , which have triiodide and the rare tetraiodide dianion as anions, are described. Computational studies reveal that the latter is highly unstable. In the present case it is stabilized by the crystal lattice, for example, by interaction with electron‐deficient π systems. 相似文献
2.
Infinite Polyiodide Chains in the Pyrroloperylene–Iodine Complex: Insights into the Starch–Iodine and Perylene–Iodine Complexes
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Dr. Sheri Madhu Hayden A. Evans Dr. Vicky V. T. Doan‐Nguyen Dr. John G. Labram Dr. Guang Wu Prof. Dr. Michael L. Chabinyc Prof. Dr. Ram Seshadri Prof. Dr. Fred Wudl 《Angewandte Chemie (International ed. in English)》2016,55(28):8032-8035
We report the preparation and X‐ray crystallographic characterization of the first crystalline homoatomic polymer chain, which is part of a semiconducting pyrroloperylene–iodine complex. The crystal structure contains infinite polyiodide I∞δ?. Interestingly, the structure of iodine within the insoluble, blue starch–iodine complex has long remained elusive, but has been speculated as having infinite chains of iodine. Close similarities in the low‐wavenumber Raman spectra of the title compound and starch–iodine point to such infinite polyiodide chains in the latter as well. 相似文献
3.
The anions [(TeCF3)2X]? (X = Cl, Br, I) resemble the trihalides [I2X]? in the solid state and show similar dynamic behaviour in solution. All three compounds crystallize iso‐structurally in the triclinic space group with Z = 2 and exhibit cell dimensions according to the sizes of the halogen atoms. 相似文献
4.
Dipl. Chem. Robin Brückner Dipl. Chem. Heike Haller Mathias Ellwanger Dr. Sebastian Riedel 《Chemistry (Weinheim an der Bergstrasse, Germany)》2012,18(18):5741-5747
Polychloride monoanions stabilized by quaternary ammonium salts are investigated using Raman spectroscopy and state‐of‐the‐art quantum‐chemical calculations. A regular V‐shaped pentachloride is characterized for the [N(Me)4][Cl5] salt, whereas a hockey‐stick‐like structure is tentatively assigned for [N(Et)4][Cl2???Cl3?]. Increasing the size of the cation to the quaternary ammonium salts [NPr4]+ and [NBu4]+ leads to the formation of the [Cl3]? anion. The latter is found to be a pale yellow liquid at about 40 °C, whereas all the other compounds exist as powders. Further to these observations, the novel [Cl9]? anion is characterized by low‐temperature Raman spectroscopy in conjunction with quantum‐chemical calculations. 相似文献
5.
Inside Back Cover: Infinite Polyiodide Chains in the Pyrroloperylene–Iodine Complex: Insights into the Starch–Iodine and Perylene–Iodine Complexes (Angew. Chem. Int. Ed. 28/2016)
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7.
S. E. Sosonyuk M. N. Bulanov I. F. Leshcheva N. V. Zyk 《Russian Chemical Bulletin》2002,51(7):1254-1261
Addition of bromine and potassium dihaloiodates(i) to 2-alkyl-2-azabicyclo[2.2.1]hept-5-enes and 2-alkyl-2-azabicyclo[2.2.2]oct-5-enes affords quaternary ammonium salts containing the aziridine ring and the polyhalide anion. The possibility of using these salts for the synthesis of 6-substituted 2-alkyl-2-azabicyclo[2.2.1]heptanes has been shown. 相似文献
8.
Mohammed S. Abdelbassit Prof. Owen J. Curnow Miriam K. Dixon Prof. Mark R. Waterland 《Chemistry (Weinheim an der Bergstrasse, Germany)》2019,25(50):11659-11669
A series of octanuclear iodine-bromine interhalides [InBr8−n]2− (n=0, 2, 3, 4) were prepared systematically in two steps. Firstly, addition of a dihalogen (Br2 or IBr) to the triaminocyclopropenium bromide salt [C3(NEt2)3]Br forms the corresponding trihalide salt with Br3− or IBr2− anions, respectively. Secondly, addition to Br3− of half an equivalent of Br2 gives the octabromine polyhalide [Br8]2−, whereas addition to IBr2− of half an equivalent of Br2, IBr or I2 gives the corresponding interhalides: [I2Br6]2−, [I3Br5]2−, and [I4Br4]2−, respectively. The four octahalides were characterized by X-ray crystallography, computational studies, Raman and Far-IR spectroscopies, as well as by TGA and melting point. All of the salts were found to be ionic liquids. 相似文献
9.
Benjamin Schmidt Sebastian Ponath Johannes Hannemann Patrick Voßnacker Dr. Karsten Sonnenberg Prof. Dr. Mathias Christmann Prof. Dr. Sebastian Riedel 《Chemistry (Weinheim an der Bergstrasse, Germany)》2020,26(66):15183-15189
The use of neat BrCl in organic and inorganic chemistry is limited due to its gaseous aggregate state and especially its decomposition into Cl2 and Br2. The stabilization of BrCl in form of reactive ionic liquids via a novel in situ synthesis route shifts this equilibrium drastically to the BrCl side, which leads to safer and easier-to-handle interhalogenation reagents. Furthermore, the crystalline derivatives of the hitherto unknown [Cl(BrCl)2]− and [Cl(BrCl)4]− anions were synthesized and characterized by single-crystal X-ray diffraction (XRD), Raman and IR spectroscopy, as well as quantum chemical calculations. 相似文献
10.
Benjamin Schmidt Karsten Sonnenberg Dr. Helmut Beckers Dr. Simon Steinhauer Prof. Dr. Sebastian Riedel 《Angewandte Chemie (International ed. in English)》2018,57(29):9141-9145
Due to a more distinct σ‐hole, BrCl is able to form stronger halogen bonds than those in polyhalogen anions based on Cl2 and Br2. This stabilization allows the crystallographic characterization of a variety of new polyinterhalides, in which chloride functions as the central ion as shown by the molecular structures of [AsPh4][Cl(BrCl)3] and [CCl(NMe2)2][Cl(BrCl)5]. Furthermore, the solid‐state structure of an octahedrally coordinated nonclassical interhalide is reported for the first time. The tridecainterhalide monoanion [Cl(BrCl)6]? consists of a central chloride ion, which is coordinated by six BrCl molecules in a slightly distorted octahedral structure. All new compounds were characterized by single‐crystal X‐ray diffraction (XRD), NMR and Raman spectroscopy, as well as quantum‐chemical calculations. 相似文献