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'Crystal Structures' in keywords Facet   Publication Year 1999  [X]
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1999[X]
21Author    Kai Landskron, Stefan Horstmann, Wolfgang SchnickRequires cookie*
 Title    Neue Tetraaminophosphonium-Salze durch Anionenaustausch in flüssigem Ammoniak Novel Tetraaminophosphonium Salts by Anion Exchange in Liquid Ammonia  
 Abstract    [P(NH2)4]Br and [P(NH2)41[N 03] have been prepared by anion exchange in liquid ammonia. Single crystals of [P(NH2)4]Br were obtained from an acetonitrile solution in a tempera­ ture gradient between 60 °C and room temperature while attempts to grow single crystals of [P(NH2)4][N 0 3] yielded [P(NH2)4][N 0 3](O P(N H 2)3). Both crystal structures were determined by single crystal X-ray methods at room temperature ([P(NH-))4]Br: P4/nbm, a = 809.2(1), c = 468.1(1) pm, Z = 2, R \ = 0.042, wR2 = 0.077; [P(NH2)4][NÖ3](OP(NH2)3): Pna2,, Z = 4, a = 1023.4(1), b = 1704.7(1), c = 618.0(1) pm, R \ =0.025', wR2 = 0.067. In the solid [P(NH2)4]Br forms a tetragonally distorted variant of the CsCl type of structure. [P(NH2)4][N 0 3](0P (N H 2)3) consists of [P(NH2)4]+cations, [N 0 3]_ anions, and OP(NH2)3 molecules which are interconnec­ ted by a complex system of hydrogen bonds. 
  Reference    Z. Naturforsch. 54b, 1019—1026 (1999); eingegangen am 12. April 1999 
  Published    1999 
  Keywords    Phosphorus, Ion Exchange, Liquid Ammonia, Crystal Structure 
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 Identifier    ZNB-1999-54b-1019 
 Volume    54 
22Author    *. Sonderdruckanforderungen, ProfK. Dr, DehnickeRequires cookie*
 Title    D ie Kristallstruktur von Bis(bromo  
 Abstract    -triphenyl)arsen(V)-hexabromo-tellurat(IV), [Ph3A sB r]2[TeBr6] Crystal Structure o f B is(brom otriphenyl)-arsen ic(V)-h exab rom otellu rate(IV), [Ph3A sB r]2[TeBr6] S oheila Chitsaz, Bernhard N eum üller, Kurt D eh nick e* Yellow-orange single crystals of [Ph3AsBr]2[TeBr6] have been prepared from satu­ rated solutions of Ph3AsBr2 and TeBr4 in aceto­ nitrile and characterized by a crystal structure de­ term ination. Space group R3c, Z = 12, lattice di­ mensions at -7 0 °C: a = b = 1337.9(2), c = 7953.8(4) pm, R = 0.0691. The structure consists of discrete ions [Ph3A sBr]+ and nearly perfectly octahedral [TeBr6]2-. 
  Reference    Z. Naturforsch. 54b, 1092—1094 (1999); eingegangen am 28. Mai 1999 
  Published    1999 
  Keywords    Arsenic, Tellurium, Bromo Complex, Crystal Structure 
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 Identifier    ZNB-1999-54b-1092_n 
 Volume    54 
23Author    Santiago Garcia-Yustea, KonradW. Hellmanna, LutzH. Gadeb, IanJ. Scowenc, Mary McpartlincRequires cookie*
 Title    Bis[l,3-bis(diphenylmethylsilylamido)propane]zirconium: A Spirocyclic Complex Containing a Sterically Demanding Chelating Amido Ligand  
 Abstract    Lithiation of the diamine CH2(CH2NHSiMePh2)2 using »-butyl lithium and subsequent reaction with zirconium tetrachloride yielded the bis(chelate)-amidozirconium complex [Zr{CH2(CH2NSiMePli2)2 }2]-The spirocyclic molecule has a distorted tetrahedral coordi­ nation at the zirconium centre with overall C2 symmetry broken only by the relative orientation of four phenyl rings. The bulky diphenylmethylsilyl substituents at the amido-N functions as well as the ligand backbone sterically protect the metal centre and render it inert towards conproportionation with zirconium chloride. 
  Reference    Z. Naturforsch. 54b, 1260—1264 (1999); received July 2 1999 
  Published    1999 
  Keywords    Silylamides, Zirconium Amide, Chelate Ligands, Crystal Structure 
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 Identifier    ZNB-1999-54b-1260 
 Volume    54 
24Author    Birgit Fehrmann, Wolfgang JeitschkoRequires cookie*
 Title    The Intermetallic Compounds GdRe2Al10 and TbRe2Al10, Crystallizing with a Stacking Variant of the YbFe2Al10 Type Structure  
 Abstract    The new compounds GdReaAlio and TbRe.Alio were obtained in well-crystallized form by reaction of the elemental components with an excess of aluminum after dissolving the matrix in hydrochloric acid. They crystallize with a new structure type which has been determined for TbReiAlio from single-crystal X-ray data: Cmcm, a = 932.2(1),/?= 1030.4(1),c= 1803.2(3)pm, Z = 8, R = 0.031 for 1159 structure factors and 77 variable parameters. Of the two terbium sites, one does not have full occupancy with terbium, however, it may have mixed Tb/Al occupancy. The resulting compositions are Tbo.948(5>Re2Alio or Tbo.936(3)Re:Alio.o64(3), respectively. The terbium atoms are coordinated by 4 Re and 16 Al atoms. The rhenium atoms are situated in distorted icosahedra formed by 2 Tb and 10 Al atoms. The nine different aluminum atoms have between 12 and 14 neighbors (1 or 2 Tb, 2 Re, and between 8 and 11 Al atoms). The structure may be viewed as consisting of two kinds of alternating layers. One of these is puckered, hexagonal close packed, with a mesh content of 4ReAl3; the other is planar and less densely packed. It has the mesh content 2TbAl4. The same kinds of atomic layers have been found in the structures of YbFe2Alio and LuRe2Alio. Thus, the three structure types may be considered as stacking variants of each other. The tetragonal CaC^Alio (ordered ThMni2) type structure also belongs to this structural family, although the CaAl4 layers somewhat differ from the layers TbAl4, YbAl4, and LuA14. 
  Reference    Z. Naturforsch. 54b, 1277—1282 (1999); received May 27 1999 
  Published    1999 
  Keywords    Intermetallic Compounds, Crystal Structure, Close Packed Layers 
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 Identifier    ZNB-1999-54b-1277 
 Volume    54 
25Author    Qianfeng Zhanga, Jinxi Chena, Maochun Hongb, Xinquan Xina, Hoong-Kun FuncRequires cookie*
 Title    Crystal and Molecular Structure of the Copper(I)-thiolate-selenide Complex [Ph4P][Cu(SeS2CNC4H8)(S2CN2C4H8)] with an Unusual Se-S Bond  
 Abstract    Reaction of a DMF solution of Cu(S^CNC4 H8) with [Ph4 P]2 [WSe4 ] affords [Ph4 P b[W Se4 -(CuS2CNC4H8)3 ] (1) and [Ph4P][Cu(SeS2 CNC4 H8)(S2 CN2 C4 H 8)] (2) in which a Se atom from the decomposition of the W Se4 2~ anion has reacted with the pyrrolidyldithiocarbamate (C4 H8dtc) ligand anion to form the new ligand anion SeSiC N C +H s'. Complex 2 crystallizes with four formula units in the monoclinic space group P2\/c in a cell of dimensions a = 10.5824(2), b = 18.7575(3), c = 18.3268(4) A and ß = 109.0980(10)°. 6055 independent reflections above background were measured with a diffractometer and the structure was re­ fined anisotropically to R =0.073. The anion contains a three-coordinated copper(I) atom. The C4 H8 dtcö ligand is bonded to the Cu+ cation in a terminal fashion, while SeS2 CNC4 H8~ chelates the Cu+ cation. The Se-S bond length is 2.231 (4) A. 
  Reference    Z. Naturforsch. 54b, 1313—1317 (1999); received April 4 1999 
  Published    1999 
  Keywords    Crystal Structure, Copper Complex, Selenium Complex, Thiolate Ligand 
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 Identifier    ZNB-1999-54b-1313 
 Volume    54 
26Author    Michael Becker, Martin Jansen, Martin Jansen Heisenbergstraße, D-70596, Stuttgart Sonderdruckanforderungen, Prof Dr, Martin JansenRequires cookie*
 Title    Darstellung und Charakterisierung von Rubidiumhydrogencyanamid Synthesis and Characterization of Rubidium Hydrogen Cyanamide  
 Abstract    The synthesis of RbHCN2 was carried out by reaction of cyanamide with rubidium amide in liquid ammonia. The crystal structure has been determinedo by x-ray powder methods (orthor-hombic, P2,2,2,, a = 7.299(1), b = 9.435(1), c = 9.420(1) Ä; Z = 8). The anion is slightly bent (174°) and exhibits two different bond lengths (C-N: 1.17, HN-C: 1.31 A). 
  Reference    Z. Naturforsch. 54b, 1375—1378 (1999); eingegangen am 26. Juli 1999 
  Published    1999 
  Keywords    Rubidium Hydrogen Cyanamide, Synthesis, Crystal Structure, IR Data 
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 Identifier    ZNB-1999-54b-1375 
 Volume    54 
27Author    Stefan DickRequires cookie*
 Title    Uber die Struktur von synthetischem Tinsleyit K[A12 (P04)2(0H)(H20)]H 20 The Structure of Synthetic Tinsleyite K[A12 (P0 4)2 (0 H)(H2 0 )] H20  
 Abstract    Synthetic tinsleyite KfAhCPO-ibCOHXFTO^TTO has been obtained by the reaction of gibb-site with a potassium-phosphate solution of pH = 7 at 423 K within five days. A single crystal X-ray structure analysis has shown that synthetic tinsleyite is isotypic with the mineral leucophosphite K[Fe2(P0 4)2(0 H)(H20)] H 20. Crystal data: monoclinic space group P2\/n, a = 949.9(2), b = 950.3(2), c = 953,5(2) pm, ß = 103,26(3)°, Z = 4. The structure of tinsleyite consists of tetranuclear A I4O 2 units formed by a central pair of edge sharing A1Ü6 octahedra, to which two additional A1C>6 octahedra are attached sharing corners. These units are crosslinked by phosphate ions to a three dimensional framework structure with tunnels along [010], occupied by potassium cations. While one type of water molecules is attached to Al, a second type is fixed in the structure by hydrogen bonds only. As a consequence two steps for thermal loss of water at 341 K and 471 K are observed. 
  Reference    Z. Naturforsch. 54b, 1385—1390 (1999); eingegangen am 15. Juli 1999 
  Published    1999 
  Keywords    Crystal Structure, Phosphate Mineral, Tinsleyite, Leucophosphite 
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 Identifier    ZNB-1999-54b-1385 
 Volume    54 
28Author    Marcus Sigl, Annette Schier, Hubert SchmidbaurRequires cookie*
 Title    Bis[(2-diphenyIphosphino)phenyl]phenylphosphine as an Inflexible Tridentate Ligand for Indium Trichloride  
 Abstract    Anhydrous indium trichloride reacts with [2-(Ph2P)C6H4]2PPh (TP) in the molar ratio 2:1 to give an ionic complex [(TP)InCl2]+ InC L-in almost quantitative yield. The structure of the product has been determined by a single crystal X-ray diffraction study. In the cation the TP molecule acts only as a bidentate ligand via its two terminal phosphorus atoms [In-Pl 2.5956(8), In-P2 2.5799o (7) A], Although the central phosphorus atom is also rather close to the metal atom [2.8259(8) A], the In-P3 interaction is inefficient because of an adverse orientation of the lone pair of electrons at P3 owing to the steric inflexibility of the ligand. Accordingly, the 11P N M R spectra of the compound in C D 2CI2 show large contact shifts and quadrupole broadening only for the signals of the two terminal phosphorus atoms, whereas the lines of the central phosphorus atom are less shifted and well resolved (A B2 spin system at -60°C). 
  Reference    Z. Naturforsch. 54b, 1417—1419 (1999); received September 15 1999 
  Published    1999 
  Keywords    Indium Trichloride, Tridentate Phosphine, Ligand Inflexibility, Crystal Structure 
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 Identifier    ZNB-1999-54b-1417 
 Volume    54 
29Author    Wolfgang Jeitschko, HorstA. Mons, Ute Ch, RodewaldRequires cookie*
 Title    Preparation and Crystal Structure of the Calcium Rhenate(VI, VII) Ca5Re30 15.x  
 Abstract    The title compound was prepared by reaction of elemental calcium with the calcium metaper-rhenate Ca(ReC>4)2. Its crystal structure was determined from single-crystal X-ray data: Amm2, a = 560.31 (5)pm, b = 1572.4(1)pm, c = 719.91 (6)pm ,Z = 2 ,R = 0.033 for 930 structure factors and 46 variable parameters. The calcium atoms occupy three atomic sites, all with seven oxygen neighbors. Of the two different rhenium atoms one has square-pyramidal oxygen coordination with an average oxidation number +6.25. The other rhenium site (oxidation number +7) was refined as a split position with trigonal-bipyramidal (75%) and tetrahedral oxygen coordination (25%). One oxygen site remains unoccupied, whenever the tetrahedral rhenium site is occupied, resulting in the composition Ca5Re3 0 i4.75. A test for superconductivity of this black compound down to 1.5 K was negative. 
  Reference    Z. Naturforsch. 54b, 1483—1488 (1999); received August 16 1999 
  Published    1999 
  Keywords    Crystal Structure, Mixed Valence, Rhenates, Perrhenates 
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 Identifier    ZNB-1999-54b-1483 
 Volume    54 
30Author    KurtO. Klepp, Ferdinand Fabian, *. Sonderdruckanforderungen, Prof Kurt, O. KleppRequires cookie*
 Title    Darstellung und Kristallstruktur von Rb6Sn2S7 New Chalcogenometallates with Binuclear Anions, I: Preparation and Crystal Structure of Rb6Sn2S7  
 Abstract    Colorless crystals of the new thiostannate Rb6Sn2S7 were obtained by reacting a stoichio­ metric melt of Rb2S, Sn and S at 700°C. The compound is orthorhombic, oP60, s.g. f '2,2,2, (No. 19) with a = 9.982(4), b = 13.45(1), c = 15.20(1) A; Z = 4. The crystal structure was determined from diffractometer data and refined to a conventional R of 0.043 (1380 Fo's, 137 variables). The crystal structure contains dimeric anions, [Sn2S7]2 -, which are built up by slightly distorted SnS4 tetrahedra sharing a common sulfur atom. The mean Sn-S bond length calculates as 2.384 Ä, the bond angle on the bridging S is 110.4°. The structure contains six independent Rb-cations which are coordinated to 5-6 sulfur atoms in irregular configurations. Neue Chalkogenometallate mit binuklearen Anionen, I: 
  Reference    Z. Naturforsch. 54b, 1505—1509 (1999); eingegangen am 13. September 1999 
  Published    1999 
  Keywords    Crystal Structure, Chalcogenides, Thiostannates, Rubidium, Tin, Sulfur 
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 Identifier    ZNB-1999-54b-1505 
 Volume    54 
31Author    M. Karl, G. Seybert, W. Massa, K. DehnickeRequires cookie*
 Title    Die Kristallstruktur von [YbCl2(THF)5]+[WOCl4(TH F)]- Crystal Structure of [YbCl2(THF)5]+ [WOCl4(THF)]  
 Abstract    Blue moisture sensitive single crystals of [YbCl2(THF)5]+ [WOCl4(THF)]-were obtained as a by-product from the reaction of the ytter­ bium trisamide Yb[N(SiMe3)2]3 with tungsten he-xachloride in THF solution. The crystals were sui­ table for an X-ray crystal structure determination. Space group P2/c, Z = 2, lattice dimensions at 
  Reference    Z. Naturforsch. 54b, 1609—1610 (1999); eingegangen am 23. August 1999 
  Published    1999 
  Keywords    Ytterbium, Chloro-THF-Complex, Tungsten, Crystal Structure 
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 Identifier    ZNB-1999-54b-1609_n 
 Volume    54 
32Author    Bernhard Neumüller, Soheila Chitsaz, Kurt DehnickeRequires cookie*
 Title    Die Kristallstrukturen von Ph3AsCI2 und /?-Ph3AsBr2 Crystal Structures of Ph3AsCl2 and ß-Ph3AsBr2  
 Abstract    Colourless single crystals of Ph3A sC l2 as well as of /?-Ph3AsBr2 were obtained from acetonitrile solutions and were suitable for X-ray structure determinations. Ph3AsCl2: Space group P212121, Z = 4, lattice dimensions at -90 °C: a = 1247.9(2), b = 
  Reference    Z. Naturforsch. 54b, 1611—1614 (1999); eingegangen am 23. August 1999 
  Published    1999 
  Keywords    Arsenic, Triphenylarsenic Dichloride, Triphenylarsenic Dibromide, Crystal Structure 
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 Identifier    ZNB-1999-54b-1611_n 
 Volume    54 
33Author    Z. NaturforschRequires cookie*
 Title    Indium Triiodide Complexes of Bis(diphenyIphosphino)ethane (dppe) and its Disulfide (dppeS2)  
 Abstract    Bis(diphenylphosphino)ethane (dppe) and its disulfide (dppeS2) react with two equivalents of indium triiodide to give high yields of the corresponding 1:2 adducts. According to crys­ tal structure determinations, both compounds are molecular bis-terminal complexes with the ligands in an all-trans conformation. Contrary to previous findings for complexes of the indium trihalides and of G aB r3 and G al3 with ditertiary phosphines in fixed cis-structure [bis(diphenylphosphino)ethene or -benzene], no iodide redistribution is observed to give the ionic species [(dppe)Inl2]+ [InL ]-. The molecular structures are also retained in solution. 
  Reference    (Z. Naturforsch. 54b, 21—25 [1999]; received October 10 1998) 
  Published    1999 
  Keywords    Indium Triiodide, Phosphine Complexes, Phosphine Sulfide Complexes, Conformation, Crystal Structure 
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 Identifier    ZNB-1999-54b-0021 
 Volume    54 
34Author    Barbara Wenzel, Peter StrauchRequires cookie*
 Title    Synthesis, Structural and EPR Investigations on Bis(tetraphenylphosphonium)- bis(l,2-dithiosquarato)oxovanadate(IV), (Ph4P)2[VO(dtsq)2]  
 Abstract    The molecular structure and EPR studies of bis(tetraphenylphosphonium)bis(1,2-dithiosquarato)oxovanadate(IV) are reported. (Ph4P)2[VO(dtsq)2] crystallizes in the mono­ clinic spaceogroup P2,/n with the unit cell parameters a = 10,9820(2), b = 15,4620(3), c = 14,5050(3) Ä, ß = 95,700(8)°, Z = 2. The g and hyperfine coupling tensors Av obtained from the EPR spectra in liquid and frozen solution are used to characterize the properties of the molecular orbital containing the unpaired electron and are compared to those obtained from EHT-MO calculations. 
  Reference    Z. Naturforsch. 54b, 165—170 (1999); eingegangen am 18. September 1998 
  Published    1999 
  Keywords    Sulfur, Oxovanadate(IV), Synthesis, EPR Data, Crystal Structure 
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 Identifier    ZNB-1999-54b-0165 
 Volume    54 
35Author    Karl Hensena>, Markus Kettner3, T., Peter Pickel3, Michael BoltebRequires cookie*
 Title    Neue dikationische Silicium-Komplexe mit N-Methylimidazol New Dicationic Silicon Complexes with N-M ethylimidazole  
 Abstract    The reactions of the dibromosilanes Et2SiBr2, Ph2SiBr2, EtHSiBr2, PhHSiBr2 and MeHSiBr2 with N-methylimidazole (NMI) led to white powders stable at room temperature (with Et2SiBr2 an 1:2 adduct, with EtHSiBr2 and Ph2SiBr2 1:3 adducts, and with PhHSiBr2 and MeHSiBr2 1:4 adducts). The compounds crystallize from solutions in chloroforme and acetonitrile. The X-ray single crystal investigations show in all five cases dicationic complexes. 
  Reference    Z. Naturforsch. 54b, 200—208 (1999); eingegangen am 8. Oktober 1998 
  Published    1999 
  Keywords    Dialkyldibromosilanes, Alkyldibromosilanes, N-Methylimidazol, Lewis-Acid-Base-Adducts, Crystal Structure 
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 Identifier    ZNB-1999-54b-0200 
 Volume    54 
36Author    Karin Dölling, Kurt Merzweiler, Christoph Wagner, Horst WeichmannRequires cookie*
 Title    3-Triorganostannyl-N-diphenylmethylen-alaninestern Synthesis, Structure and Reactivity o f 3-Triorganostannyl-N-diphenylmethylene- alanine Esters  
 Abstract    The deprotonation of N-diphenylmethylene-glycine esters, obtained from glycine ester hy­ drochlorides and benzophenone imine, and reaction of the resulting carbanions with iodo-methyl triorganostannanes gives the 3-triorganostannyl-N-diphenylmethylene-alanine esters Me2RSnCH2CH(N=CPh2)COOR' (la -e\ R = Me, 'Bu; R' = Me, Et, 'Bu, Bz). These title compounds are transformed into their tin monochlorides MeR(Cl)SnCH2CH(N=CPh2)COOR' (2a -e) by a redistribution reaction with Me2SnCl2. IR and NMR data and the crystal structure of Me2(Cl)SnCH2CH(N=CPh2)COOEt (2b) reveal for 2a -e an intramolecular coordination of the ester C = 0 group at the tin atom. Mild two-phase hydrolysis of la -e with IN HC1 gives the 3-triorganostannyl-alanine ester hydrochlorides Me2RSnCH2CH(NH 2)COOR' • HC1 (3a -e). The transformation of 3a -e into the corresponding alanine esters Me2RSnCH2CH (N H 2)COOR' (4a -e) could be realized with NH3 in chloroform. 4a -e are of limited thermal stability. 
  Reference    Z. Naturforsch. 54b, 293—299 (1999); eingegangen am 10. November 1998 
  Published    1999 
  Keywords    Stannyl Alanine Ester Derivatives, Intramolecular Pentakoordination, NMR Data, Crystal Structure 
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 Identifier    ZNB-1999-54b-0293 
 Volume    54 
37Author    Joachim Pickardt, Benedikt StaubRequires cookie*
 Title    Metallkomplexe mit 2,2'-Dipyridylamin als Liganden: Kristallstrukturen der Komplexe mit CdX2 (X = Cl, Br, I) und CuCN Metal Complexes with 2,2'-Dipyridylamine as Ligand: Crystal Structures o f the Com plexes with CdX2 (X = Cl, Br, I) and CuCN  
 Abstract    Reactions of 2,2'-dipyridylamine (dpyam) with cadmium halides yield crystals of [Cd(dpyam)(H20)C l2] (1), [Cd(dpyam)Br2] (2), and [Cd(dpyam)I2] (3). With CuCl2 and KCN a complex [C u(dpyam)C N ]H 20 (4) is obtained. Depending on the size of the halide ions the coordination changes from octahedral in 1 to trigonal bipyramidal in 2 and tetrahedral in 3. The coordination in 4 is trigonal. Due to the geometric strain imposed by the ligand all coordination polyhedra show significant distortions. 1 and 2 form dimers by halide bridges. With the excep­ tion of 3 all compounds form "supramolecular" structures via hydrogen bonds, e.g. chains or networks. 
  Reference    Z. Naturforsch. 54b, 329—336 (1999); eingegangen am 10. Dezember 1998 
  Published    1999 
  Keywords    2, 2'-Dipyridylamine Complexes, Cadmium Halides, Copper(I) Cyanide, Crystal Structure 
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 Identifier    ZNB-1999-54b-0329 
 Volume    54 
38Author    C. Drewes, W. PreetzRequires cookie*
 Title    Darstellung und spektroskopische Charakterisierung von Methylnitro  
 Abstract    -c/oso-hexaboraten sowie Kristallstrukturen von cis-(Ph4As)2[B6H4(CH3)(N02)],/ac-(Ph4As)2[B6H3(CH3)(N02)2] CH3CN und /ner-(Ph4P)2[B6H3 (CH3)(N 02)C 2] Synthesis and Spectroscopic Characterization o f Methylnitro-c/oso-hexaborates and Crystal Structures o f m -(P h 4 As)2 [B6H4 (CH3) (N 0 2)],/flc-(P h4A s)2 [B6H3(CH3)(N 0 2)2] • CH3CN and mer-(Ph4 P)2 [B6H3(CH3) (N 0 2)c2] Methylnitrotetrahydro-c/<m>-hexaborate(2-), Methyldinitr0trihydr0-c/as'0-hexab0rate( 
  Reference    Z. Naturforsch. 54b, 349—356 (1999); eingegangen am 11. November 1998 
  Published    1999 
  Keywords    ), Crystal Structure, 11B NMR Spectra, Vibrational Spectra 
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 Identifier    ZNB-1999-54b-0349 
 Volume    54 
39Author    BisacetonitrilRequires cookie*
 Title    Kristallstruktur von Hydrogenoxonium-Hexachloroantimonat  
 Abstract    The formation of hydrogen bonds to acetonitrile molecules lends stability to the hitherto un­ known hydrogenoxonium hexachloroantimonate H30 +SbCl6_ . The structure of H30 +SbCl6~ • 2 CH3CN was determined on a single crystal. It crystallises in the orthorhombic space group Pmn2(1) (Nr. 31) with Z = 2, a = 1 12,7(1),b = 988,8(1) and c = 1036,5(1) pm. 
  Reference    Z. Naturforsch. 54b, 377—380 (1999); eingegangen am 2. Dezember 1998 
  Published    1999 
  Keywords    Hydrogenoxonium Hexachloroantimonate Bisacetonitrile, Crystal Structure, Raman Data, Hydrogen Bonds 
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 Identifier    ZNB-1999-54b-0377 
 Volume    54 
40Author    KurtO. Klepp, Andreas KolbRequires cookie*
 Title    Komplexe Chalkogenide der IVa Metalle mit niedrigdimensionalen anionischen Partialstrukturen. Darstellung und Kristallstruktur von K2ZrTe3 und Rb2ZrTe3 Complex Chalcogenides of the IVa Metals with Low Dimensional Anionic Partial Structures. Preparation and Crystal Structures of K2ZrTe3 and Rb2ZrTe3  
 Abstract    The isostructural compounds K2ZrTe3 and Rb2ZrTe3 were obtained at 1000°C by reacting K7Te and Rb9Te with stoichiometric amounts of Zr and Te. The compounds are monoclinic, mP24, space group P2,/c, Z = 4 with a = 9.089(3), b = 14.148(4), c = 6.986(3)Ä, ß = 105.90(1)° and a = 9.735(4), b = 14.300(7), c = 6.952(8) Ä, ß = 108.61(2)°, respectively. The crystal structure was determined from diffractometer data and refined to R = 0.030 for 1452 Fo's for K2ZrTe3 and R = 0.038 for 1131 Fo's for Rb2ZrTe3. The crystal structure is of a new type, characterized by infinite anionic chains, ^-[ZrTe3]2_ built up by octahedra sharing opposite faces which run along [001]. The mean Zr-Te bond lengths are 2.921 and 2.920 A, respectively. The alkali cations separating the chains are characterized by two different -distorted octahedral and pentagonal bipyramidal -chalcogen environments. E inleitung 
  Reference    Z. Naturforsch. 54b, 441 (1999); eingegangen am 9. November 1998 
  Published    1999 
  Keywords    Crystal Structure, Complex Chalcogenides, Tellurides, Zirconium, Pseudo-one-dimensional solids 
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 Identifier    ZNB-1999-54b-0441 
 Volume    54 
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