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Steffi Friedrichs Peter G. Jones 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(1):56-57
Both ions of the title compound, [Au(C4H8S)2](C6H4NO4S2), display crystallographic twofold symmetry. The Au atom exhibits linear coordination, with Au—S = 2.2948 (14) Å and S—Au—S = 178.47 (9)°. The crystal packing consists of layers of anions connected by C—H?O hydrogen bonds; the cations occupy cavities in these layers and the ions are linked by Au?N contacts of 3.009 (7) Å. Further C—H?O interactions connect the layers. 相似文献
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Polysulfonylamines. CLXIV. Crystal Structures of Metal Di(methanesulfonyl)amides. 13. Dithallium Tris(dimesylamido‐N)argentate: A Two‐Dimensional Coordination Polymer The complex salt Tl2[Ag{N(SO2Me)2}3] (monoclinic, space group P21/n, Z′ = 1) was obtained by serendipity. Its layer structure displays two unprecedented characteristics, viz. one (MeSO2)2N— ion that strongly deviates from the C2‐symmetric standard conformation of this species and approximates to mirror symmetry, and a tris(dimesylamido)argentate anion featuring a trigonal‐planar AgN3 core with Ag—N bond lengths of 225.6(6), 226.0(6), 236.3(6) pm and N—Ag—N angles in accordance with VSEPR concepts [149.8(2) vs. 102.8(2) and 107.3(2)°]. The independent thallium ions are coordinated by the complex anions to form monolayer substructures, in which Tl(1) attains an O6 and Tl(2) an O5 environment; the monolayers are associated into bilayers via one independent set of Tl(2)—O bonds that concomitantly raise the coordination number for Tl(2) to six. Both TlO6 polyhedra may be viewed as extremely distorted octahedra reflecting the stereochemical activity of the 6s lone pair of electrons. The two‐dimensional Ag—N/Tl—O bonding system is reinforced by a three‐dimensional network of weak C—H···O hydrogen bonds. 相似文献
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Inside Cover: New Chiral Reagent for Installation of Pharmacophoric (S)‐ or (R)‐2‐(Alkoxyphosphono)‐1‐amino‐2,2‐difluoroethyl Groups (Chem. Eur. J. 21/2016) 下载免费PDF全文
Chen Xie Lijun Zhang Dr. Haibo Mei Dr. Romana Pajkert Dr. Maksym Ponomarenko Dr. Yi Pan Prof. Dr. Gerd‐Volker Röschenthaler Prof. Dr. Vadim A. Soloshonok Dr. Jianlin Han 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(21):6990-6990
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Yingxin Xiao Ronald J. Voll Damon R. Billodeaux Frank R. Fronczek Ezzat S. Younathan 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(5):582-583
The title compound, C20H22O6, has crystallographic twofold symmetry. The central six‐C‐atom chain has an extended conformation similar to that of d ‐mannitol, with two independent C—C—C—C torsion angles of 165.69 (14) and 177.60 (12)°. The 1,3‐dioxane ring has a chair conformation. All chiral centers have the R configuration. 相似文献
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Stphane Dufresne W. G. Skene Sergio Andrs Prez Guarìn 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(6):o350-o352
A novel macrocycle containing fluorescein, the highly fluorescent title compound, C31H32O5, has a xanthene core and a benzyl unit that are planar. The latter is rotated by 72.99 (3)° from the xanthene mean plane. The C11 alkyl tether and the xanthene group adopt a cage‐like structure and the xanthene adopts a quinoid‐type configuration. The compound crystallizes as a racemic mixture with one molecule of each isomer per unit cell. Even though the planes described by the xanthene and the benzene rings of different molecules are separated by 3.341 (4) and 3.73 (1) Å, respectively, there is insufficient overlap between the aryl units to promote π‐stacking. 相似文献
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Dr. Emilio Pardo Jesús Ferrando‐Soria Dr. Marie‐Claire Dul Dr. Rodrigue Lescouëzec Dr. Yves Journaux Dr. Rafael Ruiz‐García Dr. Joan Cano Prof. Dr. Miguel Julve Prof. Dr. Francesc Lloret Dr. Laura Cañadillas‐Delgado Dr. Jorge Pasán Prof. Dr. Catalina Ruiz‐Pérez 《Chemistry (Weinheim an der Bergstrasse, Germany)》2010,16(43):12762-12762
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Back Cover: Breslow Intermediates from Aromatic N‐Heterocyclic Carbenes (Benzimidazolin‐2‐ylidenes,Thiazolin‐2‐ylidenes) (Angew. Chem. Int. Ed. 27/2018) 下载免费PDF全文
Dr. Mathias Paul Dr. Nils E. Schlörer Dr. Jörg‐M. Neudörfl Prof. Dr. Albrecht Berkessel 《Angewandte Chemie (International ed. in English)》2018,57(27):8332-8332