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1996[X]
21Author    Johannes Beck, G. Unter BockRequires cookie*
 Title    Das Te42+-Polykation in den Strukturen von Te4  
 Abstract    Tetratellurium(2+), H exachloroniobate(l -) , Hexachlorotantalate(l -) , H exabrom otantalate(l-) , Decabrom o-/w -oxo-ditantalate(2-) The reactions of Te, TeCl4 and MC15 (M = Nb, Ta) in a sealed evacuated ampoule at 170 °C yield Te4(NbCl6)2 and Te4(TaCl6j2 as black, moisture sensitive crystals. Te4(TaBr6)2 is obtained from Te2Br and TaBr3 at 175 °C, and Te4(Ta2O B r1()) is obtained in small yields as byproduct. The crystal structure determinations (all triclinic, PI, lattice constants for Te4(NbCl6)2: a = 654,2 pm, b = 673,9 pm, c = 1200,3 pm, a = 94,54°, ß = 97,59°, y = 85,29°, V = 521,5 -106 pm3, Z = 1; for Te4(TaCl6)2: a = 651,2(5) pm, b = 747,2(7) pm, c = 1107(1) pm, a = 100,33(8)°, ß = 102,29(8)°, y = 89,24(8)°, V = 5 1 7 ,4 -106 pm3, Z = 1; for Te4(TaBr6)2: a = 680,9(3) pm. b = 710,4(3) pm, c = 1239,9(5) pm, a = 95,29(4)°, ß = 98,05(4)°, y = 85,31(4)°, V = 5 8 9 ,8 -106 pm3, Z = 1; for Te4(Ta2O B r10): a = 692,2(5) pm, b = 877,2(7) pm. c = 917(1) pm, a = 81,91(9)°, ß = 86,39(9)°, y = 74.23(6)°, V^= 530,3-106 pm3, Z = 1) have shown, that all compounds contain nearly square planar Te42+ ions. Te4(TaCl6)2 and Te4(TaBr6)2 have distorted octahedral TaCl6_ and TaBr6_ ions. Te4(NbCl6)2 is isostructural to Te4(TaBr6)2 as was shown by the coincident lattice constants. Te4(Ta2O B r10) is isomorphous to Te4(N b2O C l10) and contains a Ta2O B r102~ ion in the form of two edge-sharing octahedra with the O atom in the centre of a linear Ta=0=Ta bridge. All structures adopt simple structure types. The arrangement of the ions in the compounds Te4(M X6)2 (M = Nb, Ta, W; X = Cl. Br) corresponds to the C dl2 structure type, and in Te4(Ta2O B r1()) to the CsCl struc­ ture type. An analysis o f the T e-T e bond length in Te42+ and the distance of Te -X (X = Cl, Br) contacts to the nearest neighbour halide anions in several Te42+-halometallates shows a clear correlation. Shortening of the Te---X contacts elongates the T e-T e bonds by a donor interaction o f the halide ions with T e-T e-a* orbitals. 
  Reference    (Z. Naturforsch. 51b, 119—1 [1996]; eingegangen am 16 Mai 1995) 
  Published    1996 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0119.pdf 
 Identifier    ZNB-1996-51b-0119 
 Volume    51 
22Author    Stefan Horstmann, Wolfgang SchnickRequires cookie*
 Title    Synthese, Kristallstruktur und Eigenschaften von Tetraaminophosphoniumchlorid [P(NH2)4]C1 Synthesis, Crystal Structure, and Properties of Tetraaminophosphonium Chloride [P(NH2)4]C1  
 Abstract    [P(NH2)4]C1 has been prepared by ammonolysis of phosphorus pentachloride in liquid ammonia. The product was purified by reacting the byproduct, ammonium chloride, with diethylamine and removing the diethylamine hydrochloride. Suitable single crystals were obtained from an acetonitrile solution in a temperature gradient between 60 °C and room temperature. The crystal structure of [P(NH2)4]C1 has been determined by single crystal X-ray methods (Pbcn, a = 470.8(2), b = 1622.3(3), c = 756.3(2) pm, Z = 4). In the solid, [PfNH2)4]+ and Cl~ ions are found, resembling a Til-analogous structure. The N -H -C l distances indicate N -H — Cl hydrogen bonding interactions. The distortion of the P-N sceleton of the cation and the very short P -N H 2 distances (mean value: 161.2 pm) have been confirmed by ab initio calculations, which show a generalized anomeric effect of the electron pairs at nitrogen and pjrdjr bonding. 
  Reference    (Z. Naturforsch. 51b, 127—132 [1996]; eingegangen am 18. Mai 1995) 
  Published    1996 
  Keywords    Tetraaminophosphonium Salt, Synthesis, Crystal Structure, Vibrational Spectroscopic Data 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0127.pdf 
 Identifier    ZNB-1996-51b-0127 
 Volume    51 
23Author    Rolf Minkwitz, Ulrike Lohmann, Hans PreutRequires cookie*
 Title    Methansulfinylchlorid-Lewissäure  
 Abstract    Addukte CH3S(Cl)OMF5 (M = As, Sb) und Kristallstruktur von CH3S(Cl)OSbCl5 [1] Methanesulfinylchloride Lewis Acid Adducts CH3S(Cl)OMF5 (M = As, Sb) and Crystal Structure of CH3S(Cl)OSbCl5 [1] CH 3S(0)C1 reacts in HF as solvent with MF5 (M = As, Sb) to give products CH 3S(Cl)OMF5 (M = As, Sb). The new compounds are stable below 253 K and were charac­ terized by Raman and N M R spectroscopy. In addition, the crystal structure of C H 3S(Cl)OSbCl5 has been determinated. The complex crystallizes in the monoclinic space group P2x !n with a = 644.3(5), b = 1905.9(14), c = 900.0(7) pm, ß = 99.27(6)° with four formula units per unit cell. 
  Reference    Z. Naturforsch. 51b, 133—138 (1996); eingegangen am 6. Juni 1995 
  Published    1996 
  Keywords    Methanesulfinylchloride Lewis Acid Complexes, Preparation, Raman Spectra, N M R Spectra, Crystal Structure 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0133.pdf 
 Identifier    ZNB-1996-51b-0133 
 Volume    51 
24Author    Yong-Kang ZhangRequires cookie*
 Title    First Synthesis of C-Phenyl N-tert-Buty\ [15N]nitrone (PBN-15N) for the EPR Spin Trapping Methodology  
 Abstract    C-Phenyl N-tert-Butyl [15N]nitrone, Nitrone, Spin Trap, EPR Spin Trapping, Aminoxyl (Nitroxide) As compared to normal PBN, about fifty percent increase of electron paramagnetic reso­ 
  Reference    Z. Naturforsch. 51b, 139—143 (1996); received June 7 1995 
  Published    1996 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0139.pdf 
 Identifier    ZNB-1996-51b-0139 
 Volume    51 
25Author    Karl Peters3, Eva-Maria Peters3, Gerhard Bringmannb, Sven HarmsenbRequires cookie*
 Title    l,4-Dibromonaphthalene-2,3-diyI- bis(l'-bromo-2'-naphthoate) * CHC13, a Potential Precursor to Lactone-Bridged Teraryls  
 Abstract    The title compound was prepared from 1,4-di-bromo-2,3-dihydroxynaphthalene by two-fold es-terification with l-bromo-2-naphthoic acid. It crystallizes from chloroform in the triclinic sys­ 
  Reference    Z. Naturforsch. 51b, 144—146 (1996); received June 20 1995 
  Published    1996 
  Keywords    Crystal Structure, Biaryl Coupling, Teraryls 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0144_n.pdf 
 Identifier    ZNB-1996-51b-0144_n 
 Volume    51 
26Author    Rolf Minkwitz, Detlef KonikowskiRequires cookie*
 Title    Über verbesserte Darstellungs­ methoden für CF3OCH3 Improved Methods to Prepare CF3 O C H 3  
 Abstract    The reaction of CH 3I with CF3OCl at 203 K yields CF3O C H 3. The preparation of the ether by methylation of CsOCF3 with (CH3)2S 0 4 is also described. 
  Reference    Z. Naturforsch. 51b, 147—148 (1996); eingegangen am 21. Juni 1995 
  Published    1996 
  Keywords    1, 1, 1-Trifluoromethyl-methyl-ether, Preparation, N M R Spectra 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0147_n.pdf 
 Identifier    ZNB-1996-51b-0147_n 
 Volume    51 
27Author    MohammedA. Mohammed, KlausH. Ebert, HansJoachim BreunigRequires cookie*
 Title    Zwischenmolekulare Wechselwirkungen bei RSbCl2 und die Bildung cyclischer Organoantimon(III)-chalkogenide, (RSbE)" [R = (Me3Si)2CH, E = S, Se, Te] Intermolecular Interactions of RSbCl2 and Formation of Cyclic Organoantimony(III) Chalcogenides, (RSbE)" [R = (Me3Si)2CH, E = S, Se, Te]  
 Abstract    Alkylantimony Dichloride, Cyclostibane Chalcogenides The crystal structure of the compound (Me3Si)2CHSbCl2 (1) has been determined as ob­ tained from the melt. It contains dimers with in­ termolecular Sb—Cl distances of 351.8 (1) pm. Reactions of 1 with the corresponding sodium chalcogenides yield the products (RSbS)" (2), (RSbSe)" (3) and (RSbTe)" (4) [R = (Me3Si)2CH], The mass spectra of 2 -4 give peaks for the dimers, trimers and tetramers, while the NM R spectra of solutions of 2-4 in CDC13 show that the trimers are the most abundant species in ring-ring-equilibria. 
  Reference    Z. Naturforsch. 51b, 149—152 (1996); eingegangen am 2. Mai 1995 
  Published    1996 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0149_n.pdf 
 Identifier    ZNB-1996-51b-0149_n 
 Volume    51 
28Author    Hans Bock, Sabine Nick, Wolfgang Seitz, Christian Näther, JanW. BatsRequires cookie*
 Title    Structures of Charge-Perturbed or Sterically Overcrowed Molecules, 80 [1 -3] Structural Changes of /?-Benzoquinone by Donor and Acceptor Substituents  
  Reference    Z. Naturforsch. 51b, 153—171 (1996); eingegangen am 29. Mai 1995 
  Published    1996 
  Keywords    Crystal Structure, Oxo-and Alkylamino-Substituted p-Benzoquinone Derivatives, Substituent Effects, Cyanine Distortion, AM 1 Calculations 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0153.pdf 
 Identifier    ZNB-1996-51b-0153 
 Volume    51 
29Author    Srb^sioogThomas Berger, Klaus-Jürgen RangeRequires cookie*
 Title    Hochdrucksynthese und Strukturverfeinerung von Strontium-Danburit, SrB2Si20 8 High-Pressure Synthesis and Structure Refinement of Strontium Danburite  
 Abstract    of strontium danburite, SrB2Si20 8, were found after high-pressure treatment of SrSi03/Si02/Al20 3 mixtures at 40 kbar and 1400°C, obviously formed by an unwanted side reaction with the boron oxide-containing boron nitride capsules used. The crystals are orthorhombic, space group Pnma, with a = 8.1891 (5), b = 7.9311 (6), c = 8.9284(5) A and Z = 4. The structure was refined to R = 0.031, Rw = 0.028 for 590 independent, absorption-corrected reflections. SrB2Si20 8 is isostructural with danburite (CaB2Si20 8). The structure comprises a tetrahedral framework of ordered B20 7 and Si2Ov groups which contains Sr in irregular coordination. Die Kristallstruktur des seit 1839 bekannten Dan-burits, CaB2Si20 8, wurde 1931 von Dunbar und Machatschki [1] bestimmt und später von Johann-son [2], Bakakin, Kravchenko und Belov [3] sowie von Phillips, Gibbs und Ribbe [4] verfeinert. Ob­ wohl Dunbar und Machatschki die Positionen der Boratome nur ungenau festlegen konnten, haben sie das Grundprinzip der Danburitstruktur korrekt be­ schrieben; es liegt ein dreidimensionales Netzwerk aus geordnet verteilten, eckenverknüpften B20 7-und Si20 7-Gruppen vor, das die Ca-Atome in irre­ gulärer Koordination durch Sauerstoff enthält. Eine 1'B-NMR-Studie von Brun und Ghose [5] belegt, daß die geordnete B-Si-Verteilung in Danburit bis zu dessen Zersetzungstemperatur erhalten bleibt. Während also CaB2Si2Ö 8 strukturell gut charak­ terisiert ist, lagen von der homologen Verbindung SrB2Si20 8 bisher nur Pulverdaten vor. SrB->Sio08 wurde erstmals von Verstegen et al. erwähnt, die die Lumineszenz der Eu-aktivierten Verbindung un­ tersuchten [6]. Auf sie geht auch die Bestimmung der Zellparameter zurück. Aufgrund der vermute­ ten Ähnlichkeit zum Danburit schlugen Verstegen et al. [6] für SrB2Si2Og den Namen Strontium-Dan-burit vor. Eine weitere Erwähnung der Verbindung SrB2Si20 8 erfolgt bei Baylor und Brown [7], die Phasengleichgewichte im ternären System SiCX-B20 3-Sr0 untersuchten. * Sonderdruckanforderungen an Prof. Dr. K.-J. Range. 
  Reference    Z. Naturforsch. 51b, 172—174 (1996); eingegangen am 20. Juli 1995 
  Published    1996 
  Keywords    Stontium Danburite, High-Pressure Synthesis, Crystal Structure Single crystals 
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 Identifier    ZNB-1996-51b-0172 
 Volume    51 
30Author    Fernández, Jürgen Hartung3, Lothar Beyerb, Jussi Kivikoski, JudithA K HowardcRequires cookie*
 Title    Vicente  
 Abstract    31, 1995 Hexachlorodicuprate, 3-Diethylamino-5-phenyl-1,2,4-dithiazolium Salt, Low Temperature Crystal Structure, Thermochromism The crystal structure of the compound (dpd)2Cu2Cl6 at 120 K has been determined. Space group P2\ /n , Z = 2, 3997 collected reflections, R = 6.8. Lattice dimensions (120(1)K) : a = 7.328 (8), b = 16.863 (14), c = 13.271 (10) Ä; ß = 91.44(7). 
  Reference    Z. Naturforsch. 51b, 175—177 (1996); received March 
  Published    1996 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0175.pdf 
 Identifier    ZNB-1996-51b-0175 
 Volume    51 
31Author    Martin Köckerling, Gerald HenkelRequires cookie*
 Title    Nickelkomplexe  
 Abstract    mit Thioether-Chelatliganden: Elektrochemische Eigenschaften und Kristallstrukturen von [Ni(MeSCH2CH2SMe)2 (NCS)2], [Ni(EtSCH2CH2SEt)2(NCS)2] und [Ni(MeSCH2CH2SMe)2Br2] Nickel Complexes with Chelating Thioether Ligands: Electrochemical Properties and Crystal Structures of [Ni(MeSCH2CH2SMe)2(NCS)2], [Ni(EtSCH2CH,SEt)2(NCS)2] and [Ni(MeSCH2CH2SMe)2Br2] interest in nickel complexes with sulfur donor ligands as models for the active sites of nickel-containing hydrogenases has prompted us to investigate the structural and elec­ trochemical behaviour of nickel complexes with bifunctional thioether ligands. Crystals of [Ni(MeSCH,CH,SMe),(NCS),] (1) and [Ni(EtSCH2CH,SEt)2(NCS)2], (2) are triclinic, space group Pi, Z = 1, 1: a = 7.293(3) A, b = 7.567(3) A, c = 8.784(3) A, a = 72.81(3)°, ß = 78.41(3)°, 7 = 85.14(3)°; 2: a = 8.611(1) A, b = 8.101(1) Ä, c = 9.163(1) ßrbÄ, a = 66.54(1)°, ß = 76.19(1)°, 7 = 67.88(1)ßrb°. [Ni(MeSCH2CH2SMe^Br2] (3) crystallizes in the mono­ clinic space group P2,/n, a = 6.757(2) A, b = 7.881(2) A, c = 14.674(4) Ä, ß = 94.05(2)°, Z = 2. In crystals of 1, 2 and 3 mononuclear neutral complex molecules are observed which have pseudo-octahedral rran5-NiS4L2 coordination sites. The cyclovoltammograms of 1 and 3 in MeCN (Ag/AgCl/KCl, 3 mol/1) show only irreversible oxidation waves at +837 mV for 1 and +846 mV for 3, respectively, which are characteristic features of NCSe and Bre ions. In addition, a reduction wave at +393 mV is observed in 3. No redox response is found in the potential region between -700 and +100 mV which is used by the NiFe hydrogenase enzymes. 
  Reference    Z. Naturforsch. 51b, 178—186 (1996); eingegangen am 18. Juli 1995 
  Published    1996 
  Keywords    Nickel-Sulfur Complexes, Thioether Ligands, Crystal Structure, Electrochemistry, Bioinorganic Chemistry Current 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0178.pdf 
 Identifier    ZNB-1996-51b-0178 
 Volume    51 
32Author    Ralph Bergs, Roland Krämer, Michael Maurus, Bernhard Schreiner, Reinhold Urban, ChristopherM. Issling, Kurt Polbom, Karlheinz Siinkel, Wolfgang BeckRequires cookie*
 Title    Metallkomplexe mit biologisch wichtigen Liganden, LXXXIV [1] Halbsandwich-Komplexe von Rhodium(III), Iridium(III), Cobalt(III), Ruthenium(II), Ruthenium(III) und Chrom(III) mit Aminosäureester-Liganden Metal Complexes with Biologically Important Ligands, LXXXIV [1] Half-Sandwich Complexes o f Rhodium(III), Iridium(III), Cobalt(III), Ruthenium(II), Ruthenium(III) and Chromium(III) with Amino Acid Ester Ligands  
 Abstract    A series of cyclopentadienyl and pentamethylcyclopentadienyl complexes of cobalt, rhodium, iridium, ruthenium and chromium with a-amino-acid esters (L) as ligands was prepared and characterized: Cp*(Cl)2M(L) (1, 2: M = Rh, Ir), Cp(I)2Co(L) (4), [Cp(Ph3P)2Ru(L)]+BF~ (6), [Cp(OC)(Ph3P)Ru]+BF^ (7) and the paramagnetic compounds Cp*(Cl)2Ru(L) (8) and Cp(Br)2Cr(L) (9). AlaOMe and HisOMe form N ,0 and N,N chelate complexes [Cp*(Cl)M(alaOMe)]+BF~ (3: M = Rh, Ir), [Cp(I)Co(hisOMe)]+BF4. Cp*Co(CO)I2 and GlyOMe gave the N,0-dipeptide ester complex Cp*(I)Co(glyglyOMe)]+BF^ (5). The crystal structures of Cp(I)2Co(glyOEt) and Cp*(Cl)2Ru(alaOMe) were determined by X-ray diffrac­ tion. The complexes 1 and 2 undergo ester exchange reactions with CD3OD. [Cp*MCl2]2 (M = Rh, Ir) catalyze the exchange of the ethoxy group in Me2NCH2C 0 2Et by CD3OD. 
  Reference    Z. Naturforsch. 51b, 187—200 (1996); eingegangen am 21. Juli 1995 
  Published    1996 
  Keywords    Transition Metal Complexes, Cyclopentadienyl, a-Amino Acid Ester 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0187.pdf 
 Identifier    ZNB-1996-51b-0187 
 Volume    51 
33Author    Jochen Ellermann, Peter Gabold, FalkA. Knoch, MatthiasM. Oll, Astrid Schmidt, Martin SchützRequires cookie*
 Title    Chemie polyfunktioneller Moleküle, 120 [1] Synthesen und Kristallstrukturanalysen von Tris(imido-tetraphenyl- diphosphinato-0,0')eisen(III) und des PP-verknüpften Phosphazens Ph2P-N=PPh2-PPh2=N-PPh2 Chemistry o f Polyfunctional M olecules, 120 [11 Syntheses and Crystal Structures o f Tris(imido-tetraphenyl-diphosphinato-0,0')iron(III) and o f the PP-Connected Phosphazene Ph2P-N=PPh2-PPh2=N-PPh2  
 Abstract    While the reaction of anhydrous iron(III) chloride with the chelate ligand [(C6H5)2P(0)]2NH (6) is an efficient way to synthesize the new tricyclic compound imido-tetraphenyl-diphosphinato-0,0'iron(III), [Fe{0-P(Ph2)=N-P(Ph2)= 0 }3] (4), treatment of [(C6H5)2P]2NLi (1) with anhydrous iron(III) fluoride in THF represents a simple route to obtain the phosphorus-phosphorus connected species Ph2P-N=PPh2-PPh2=N-PPh2(7). Both compounds were charac­ terized by X-ray crystallography, 'H ,31 P {1H}, 13C {1H} NMR, IR, Raman and mass spectra. 
  Reference    Z. Naturforsch. 51b, 201—208 (1996); eingegangen am 24. Juli 1995 
  Published    1996 
  Keywords    Phosphazene, Iron Complexes, Synthesis, X-Ray 
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 Identifier    ZNB-1996-51b-0201 
 Volume    51 
34Author    Christoph Kümmel, Anton Meller, Mathias NoltemeyerRequires cookie*
 Title    Intramolekular-stabilisierte Organogallium-und -indiumhalogenide. Ein erstes neutrales Indiumhydrid Intramolecularly Stabilized Organogallium-and -indium Halides. A First Neutral Indium Hydride  
 Abstract    The intramolecularly coordinating 2-(dimethylaminomethyl)phenyl-(X) and 4-terr-butyl-2,6-bis(dimethylaminomethyl)phenyl-(Y) ligands were employed in the preparation of the gallium and indium halides: X2InI (B), XInI2 (1), X2InBr (2), XInBr2 (3), XIn(Et)I (4), XGaI2 (6) and YInI2 (7). The first neutral indium hydride X2InH (5) was made in situ from LiInH4 and 2. Z2InCl (8) (Z = 2-pyridyl-bis(trimethylsilyl)methyl), and X3Ga (C) were also synthesized. The compounds are characterized by N. M. R. ('H, 13C, 29Si and for 6 71Ga) and mass spectrometry and elemental analyses or peak matching M. S.. N. M. R.-data are discussed as well as the X-ray structure analyses provided for B, 2, 4, 5, 7 and 8. 
  Reference    Z. Naturforsch. 51b, 209—219 (1996); eingegangen am 13. Juli 1995 
  Published    1996 
  Keywords    Gallium Halides, Indium Halides, Gallium Aryls, Indium Aryls, Aryl Indium Hydride 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0209.pdf 
 Identifier    ZNB-1996-51b-0209 
 Volume    51 
35Author    Ch Rabbow, O. Sfreddo, Hk Müller-BuschbaumRequires cookie*
 Title    Uber ein Barium-Lanthanoid-Oxozinkat-Platinat(IV): Ba17Ybi6Zn8Pt40 57 On a Barium Rare Earth Oxozincate-Platinate(IV): B a j 7 Yb 16Z n8Pt40 57  
 Abstract    Reactions of B a C 0 3, ZnO and Yb20 3 mixtures at temperatures up to 1300 °C using plati­ num crucibles led to yellow needles of B a17Y b 16Zn8Pt40 57. The compound crystallizes with a hitherto unknown tetragonal crystal structure, space group C-4h-I4/m, a = 22.731(1), c = 5.682(1) A , Z = 2. The crystal structure is characterized by P t 0 6 octahedra and tetragonal Z n 0 5 pyramids. Yb3+ shows a mono-capped trigonal prismatic coordination and Ba2+ several different coordination environments (C .N = 9 to 10, by O2"). The relationship to the Ba5Ln8M40 2i type is discussed. 
  Reference    Z. Naturforsch. 51b, 220 (1996); eingegangen am 10. Juli 1995 
  Published    1996 
  Keywords    Barium, Rare Earth, Zinc, Platinum, Crystal Structure 
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 Identifier    ZNB-1996-51b-0220 
 Volume    51 
36Author    S. Frenzen, Hk Müller-BuschbaumRequires cookie*
 Title    Uber ein neues Oxoiridat(V) vom Sr4P t0 6-Typ: NaSr3Ir06 On a New O xoiridate(V) of the Sr4P t 0 6 Type: NaSr3I r 0 6  
 Abstract    Single crystals of NaSr3I r 0 6 have been prepared by heating mixtures of Na20 2, SrO and iridium in closed silver tubes and were investigated by X-ray techniques^ NaSr3I r 0 6 crystal­ lizes with trigonal (rhombohedral) symmetry in the space group D 3d-R 3 c , a = 9.636(2), c = 11.556(3) A , Z = 6, and is isotypic to compounds of the Sr4P t 0 6 type. The substitution of Sr2+ by N a+ in NaSr3I r 0 6 led to an ordered metal distribution and an increase of the oxida­ tion state from IrIV to Irv. 
  Reference    Z. Naturforsch. 51b, 225 (1996); eingegangen am 2. Juni 1995 
  Published    1996 
  Keywords    Sodium, Strontium, Iridium Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0225.pdf 
 Identifier    ZNB-1996-51b-0225 
 Volume    51 
37Author    S. Münchau, Hk Müller-BuschbaumRequires cookie*
 Title    Ein Cadmium-Kupfer-Phosphat mit einfach überkappten trigonalen C d 0 6-Prismen-Netzen: C d ^ C u ^ sC P O ^ On a Cadmium Copper Phosphate Containing Single Capped Trigonal C d 0 6 Prism-Nets: Cdj 3 5 0 ^ 65( P 0 4)2  
 Abstract    Single crystals o f Cd! 35Cui 65(P 0 4)2 have been prepared by solid state reactions below the melting point of the starting compounds. The light green crystals crystallize with monoclinic symmetry, space group C |h-P 2 ,/c , a = 9.062(2), b = 11.669(2), c = 5.950(2) Ä , ß = 97.88(2)°, Z = 4. Cdj 35Cu! 65(P 0 4)2 shows relationship to the mineral graftonite. The crystal structure is characterized by nets of corner connected Cd20 12 cally occupied by Cd2+ and Cu2+ ions. 
  Reference    Z. Naturforsch. 51b, 229 (1996); eingegangen am 20. Juni 1995 
  Published    1996 
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 Identifier    ZNB-1996-51b-0229 
 Volume    51 
38Author    D. Frerichs, C. H. Park, Hk Müller-BuschbaumRequires cookie*
 Title    Zur Kenntnis der Tief-und Hochtemperaturform eines Oxidarsenats des Zinks: Zn0Z n3(A s0 4)2 On the Low and High Temperature Form o f an Oxidearsenate of Zinc: Z n 0 Z n 3( A s 0 4)2  
 Abstract    Single crystals of the low (t-) and high (h-) temperature form o f Z n 0 Z n 3(A s 0 4)2 have been prepared by flux and by C 0 2-L A SER techniques respectively. Both compounds crystal­ lizes monoclinic, space group C2h-P2;/n with the lattice parameters t-Z n 0 Z n 3(A s 0 4)2: a = 9.807(3), b = 8.180(2), c = 9.967(2) A , ß = 116.53(2)°, Z = 4 and h -Z n 0 Z n 3(A s 0 4)2: a = 9.743(3), b = 8.163(8), c = 17.933(2) A , ß = 91.55(2)°, Z = 8. Similarities and differences of the crystal structures will be discussed. 
  Reference    Z. Naturforsch. 51b, 233 (1996); eingegangen am 10. Juli 1995 
  Published    1996 
  Keywords    Zinc, Arsenic, Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0233.pdf 
 Identifier    ZNB-1996-51b-0233 
 Volume    51 
39Author    Hk Müller-Buschbaum, St GallinatRequires cookie*
 Title    Zur Kristallchemie von CuDyMo20 8 und CuYbMo20 8 On the Crystal Chemistry o f C uD yM o20 8 and CuYbM o2O g  
 Abstract    Single crystals o f (I) C uD yM o20 8 and (II) CuYbM o20 8 have been prepared by crystalli­ sation from melts. Both com pounds crystallize with orthorhombic symmetry, space group D 2 5h~Pbca with (I): a = 10.195(1), b = 9.721(2), c = 14.563(3); (II): a = 10.094(6), b = 9.628(9), c = 14.467(8) A , Z = 8. The crystal structure is characterized by a triangular C u 0 3-polygon, a square antiprismatic coordination around the Rare Earth ions and the typical M o 0 4 tetra­ hedra. 
  Reference    Z. Naturforsch. 51b, 240 (1996); eingegangen am 18. Mai 1995 
  Published    1996 
  Keywords    Copper, Rare Earth M olybdenum Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0240.pdf 
 Identifier    ZNB-1996-51b-0240 
 Volume    51 
40Author    H. Kunkely, A. VoglerRequires cookie*
 Title    Photoredox Decomposition of [Cobalamin-^-NC-Fen(CN)5]3* Induced by Metal-to-Metal Charge Transfer Excitation  
 Abstract    In the presence of oxygen aqueous solutions of the binuclear complex [cobalamin-^-NC-Fe(C N)5]3' undergo a redox photolysis (0 ~ 2 x 10'3 at Airr = 405 nm) which yields aquocoba-lamin and [Fe(C N)6]3\ It is suggested that this photoreaction is induced by direct metal-to-metal charge transfer (M M CT) excitation. On the contrary, [cobalamin-fx-NC-Ru(CN)5]3' is photo-inert because a reactive MMCT state is not accessible. 
  Reference    Z. Naturforsch. 51b, 245 (1996); received July 7 1995 
  Published    1996 
  Keywords    Vitamin B I2, Photolysis, Electron Transfer, Cyano Complexes, Iron 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0245.pdf 
 Identifier    ZNB-1996-51b-0245 
 Volume    51 
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