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1995[X]
21Author    AndreasF. Stange, Eberhard Waldhör, Michael Moscherosch, Wolfgang KaimRequires cookie*
 Title    Variable Structure of the Cu2S2 Core in Doubly Thiolate-Bridged Dicopper(I) Complexes. An X-Ray Crystallographic, Electrochemical and EPR Study of (dmp)2 (o-CH3 C6H4S)2Cu2 , dmp = 2,9-Dimethyl-l,10-phenanthroline, and a Comment on the Nature of Phenanthroline-Containing "Cu(0)" Complexes  
 Abstract    The molecular and crystal structure of the dicopper(I) complex (dm p)2(M-o-CH3C6H4S)2Cu2 (1), dmp = 2,9-dim ethyl-l,10-phenanthroline, has been deter­ mined. With Cu/S/Cu and S/Cu/S bond angles between 80 and 100°, the planar structure of the central CuSCuS four-membered ring is much more symmetric for 1 as compared to the analogous complex 2 of unsubstituted 1,10-phenanthroline which has a folded Cu2S2 core with bond angles between 67 and 108°. This result illustrates a considerable structural flexi­ bility of the LCu(m-SR)2CuL entity which is being discussed as a possible model for CuA centers of cytochrome c oxidase or nitrous oxide reductase. Oxidation of both com plexes 1 and 2 remains irreversible even at cyclovoltammetric scan rates o f 1 V/s. However, the methyl substitution in complex 1 causes increased reversibility of the electronically coupled dmp-based reduction processes. Accordingly, the EPR spectrum of l -* is characterized by hyper-fine splitting from dmp--and a relatively small 63 " Cu coupling of 0.53 mT. The stabilization of 2,9-disubstituted 1,10-phenanthroline radical anions by coordination to Cu(I) is also dem ­ onstrated by detection of a single broad EPR line at g 2.0028 for the formal "C u(0)" complex Cu(dpp)2 = CuI(dpp_-)(dpp), dpp = 2,9-diphenyl-l,10-phenanthroline. While the EPR signal of Cu(dpp)2 loses intensity on cooling, possibly due to dimerization and spin-pairing, the distorted tetrahedral configuration with essential orthogonal arrangement of dpp jz systems seem s to disfavour an intramolecular electron hopping. 
  Reference    (Z. Naturforsch. 50b, 115—122 [1995]; received July 25 1994) 
  Published    1995 
  Keywords    Crystal Structure, Copper Complexes, Sulfur Ligands, 1, 10-Phenanthrolines, EPR Spectra 
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 Identifier    ZNB-1995-50b-0115 
 Volume    50 
22Author    Wolfgang Kaim, Jörg FeesRequires cookie*
 Title    The New Tetrafunctional i t Acceptor Ligand 3,6-Bis(2'-pyrimidyl)-l,2,4,5-tetrazine (bmtz): Diruthenium Complexes of bmtz and of its 1,4-Dihydro Form  
 Abstract    Synthesis, physical properties and the coordination with two [Ru(bpy)2]2+ complex frag­ ments are described for 3,6-bis(2'-pyrimidyl)-l,2,4,5-tetrazine (bmtz), the first compact ligand which offers four equivalent a-diimine chelate sites. Spectroelectrochemistry of intensely blue {(a-bmtz)[Ru(bpy)2]2}"+, n = 4, reveals a very facile reduction (n -3) at -0 .4 0 V vs. FeCp2+/o and a metal oxidation (n = 5) at +1.18 V to a diruthenium (II/III) mixed-valent form which exhibits an intervalence transfer absorption at 1490 nm. The corresponding complex {(M-H2bm tz)[Ru(bpy)2]2}4+ with the 1,4-dihydro form H 2bmtz of the tetrafunctional ligand is oxidized in two steps at 0.58 and 1.07 V vs. FeCp2+/°. 
  Reference    (Z. Naturforsch. 50b, 123—127 [1995]; received August 26 1994) 
  Published    1995 
  Keywords    Heterocycles, Complex Ligands, Ruthenium Compounds, Electrochemistry, Mixed Valency 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0123.pdf 
 Identifier    ZNB-1995-50b-0123 
 Volume    50 
23Author    Dagmar Henschel, Blaschette Arm, P. Eter, G. JonesRequires cookie*
 Title    Polysulfonylamine, LXIII [1] Methanol als Bindeglied in Komplexen von 18-Krone-6 mit aciden Neutralmolekülen: Bildung und Kristallstrukturen von zwei monomeren Komplexen (CH2CH20 ) 6*2 MeOH *2 H N (S02-Aryl)2 und des kettenpolymeren Komplexes [(CH2CH20 ) 6-3 MeOH-HNCSOzMeXSO^h)]«, Polysulfonylamines, LXIII [1] M ethanol as a Link in 18-Crown-6 Complexes with Uncharged Acidic Molecules: Syntheses and Crystal Structures of Two M onomeric Complexes (C H 2C H 20 ) 6-2 M eO H -2 H N (S 0 2 -Aryl) 2 and of the Chain-Polymeric Complex [(CH2CH20 ) 6 * 3 M eO H * H N (S 0 2 M e)(S 0 2 Ph)]D O  
 Abstract    Di(arenesulfonyl)amines, (Benzenesulfonyl)(methanesulfonyl)amine, 18-Crown-6, Complexes of U ncharged Molecules, Crystal Structure The thermally labile ternary complexes 18C6-2 M eO H -2 H N (S 02Ph)2 (2a), 18C 6-2 M eOH -2 H N (S 0 2-C 6H 4-4 -C l)2 (2b) and 18C6-3 M e O H ■ H N (S 02M e)(S 0 2Ph) (3) were obtained by co-crystallization of 18-crown-6 (18 C 6) and the appropriate di(organo-sulfonyl)amine from methanolic solutions and characterized by low-temperature X-ray dif­ fraction. The crystal structures of 2a (monoclinic, space group P 2xln) and 2b (triclinic, space group P I) consist of monomeric, centrosymmetric formula units. Each di(arenesulfonyl)-amine molecule is connected to a m ethanol molecule by an N -H —O hydrogen bond (H —O 203 pm in 2a, 190 pm in 2b). The m ethanol molecules are linked to three alternate crown oxygen atoms via one O -H — O(crown) hydrogen-bond and two weaker C -H — O(crown) interactions (OH —O 201 pm in 2a, 186 pm in 2b; CH —O 236 and 247 pm in 2a, 240 and 254 pm in 2b); two symm etry-related oxygen atoms of the crown are involved in O -H —O and the other four in C -H —O interactions. The structure of complex 3 (monoclinic, space group P 2 X) is built of infinite chains parallel to [101]. The methyl group of the di(organo-sulfonyl)amine is bonded by C -H — O(crown) interactions to a set of three alternate oxygen atoms of the cyclic polyether (H —O 228, 245 and 247 pm). Starting from the acidic NH function, a sequence of three methanol molecules catenated by hydrogen bonds curves around the bulky phenyl group and links with its term inal MeOH through one O -H O (c r o w n) and two C -H —O(crown) bonds to the second set of alternate oxygen atoms in the adjacent symmetry-equivalent crown (OH —O 193 pm, CH —O 248 and 250pm). Within the chain sequence N -H — 0 '(M e)H ' — 0"(M e)H " —0"'(M e)H , the H -O distances are H —O ' 184, H ' —O" 189 and H" —O'" 183 pm. In the structures of 2a, 2b and 3, the crown rings adopt the frequently observed D 3d pseudosymmetry. 
  Reference    (Z. Naturforsch. 50b, 128—138 [1995]; eingegangen am 2. August 1994) 
  Published    1995 
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 Identifier    ZNB-1995-50b-0128 
 Volume    50 
24Author    M. Athias, O. Senge3, Karin Ruhlandt-Sengeb, KevinM. Smith3Requires cookie*
 Title    Structure and Conformation of Photosynthetic Pigments and Related Compounds, 8 [1] Molecular Structure o f an Iron(III) Chlorophyll Derivative - Chloro(phytochlorinato methyl ester)iron(III)  
 Abstract    Chloro(phytochlorinato methyl ester)iron(III), Chlorophyll Derivatives, Crystal Structure The crystal and molecular structure of chloro(methyl phytochlorinato)iron(III), 4, have been determ ined by single crystal X-ray crystallography to obtain further information on the conformation of metallochlorins related to chlorophyll. The compound crystallized with two independent molecules mainly distinguished by the orientation of the axial ligand. The macrocycles show significant deviations from planarity larger than those observed in corre­ sponding magnesium(II) complexes. The overall type of distortion is similar to those found in chlorojphyllides. Com pound 4 crystallized in the monoclinic space group P 2 t (MoKa,A = 0.71063 A) with unit cell dimensions a = 12.035(6) A , b = 13.396(8) A, c = 19.04(2), b = 97.51(2) A, Z = 4, V = 3043(4) A 3. The structure was refined to an /?-value of 0.075 on the basis of 3974 reflections with I > 3.0a(I) (130 K). 
  Reference    Z. Naturforsch. 50b, 139—146 (1995); received April 13 1994 
  Published    1995 
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 Identifier    ZNB-1995-50b-0139 
 Volume    50 
25Author    Anna Janecka3, StevenK. Oerberb, Tomasz Janecki3, Cyril Bowersc, Karl Folkers3Requires cookie*
 Title    N5-PyrazinylcarbonyIornithine, an Effective Substituent for Position 5 of Antagonists of LHRH  
 Abstract    Com puter modeling was used to find an effective substituent for position 5 in antagonists of the luteinizing hormone-releasing hormone (LHRH). In particular, it was desired to replace ds-3-(4-pyrazinylcarbonylaminocyclohexyl)alanine in position 5 because this sub­ stituent is laborious to synthesize. Calculations revealed that N5-pyrazinylcarbonylornithine (PzOrn) should be a suitable substitute for cPzACAla, with N6-pyrazinylcarbonyllysine (PzLys) being a second choice. Twelve analogs were synthesized in four series with DNal or DQal in position 1 and ILys or Arg in position 8. Biological assays validated the calculations and show that antagonists with PzOrn are more potent in antiovulatory assay than antag­ onists with PzLys. The antagonists with PzOrn were comparable in AOA with antagonists with cPzACAla. What is also im portant, antagonists with PzOrn released significantly less histamine than those with cPzACAla. 
  Reference    Z. Naturforsch. 50b, 147—150 (1995); received April 27 1994 
  Published    1995 
  Keywords    LH RH Antagonists, Com puter Modeling, Antiovulatory Activity, Histamine Release, Solid Phase Peptide Synthesis 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0147.pdf 
 Identifier    ZNB-1995-50b-0147 
 Volume    50 
26Author    H. Artm, Ut Laatsch, Bernd Renneberg, Elisabeth Duvernay, AndreasJohann SchmidtRequires cookie*
 Title    Synthese von Neozeylanon und Isozeylanon und neue Reaktionen von Chinonen mit Diazomethan Synthesis of Neozeylanone and Isozeylanone and New Reactions of Quinones with Diazom ethane  
 Abstract    Isozeylanone, Cyclopropanated Dimeric Quinones D iazom ethane adds to plumbagin (la) yielding the indazolequinone 7 which, in the presence of sodium hydroxide, reacts to form nitrogen and the anion 4 a. The latter reacts with excess juglone (lb) or juglone methyl ether (lc) forming isozeylanone (6a) and neo­ zeylanone (6 c) or their corresponding monomethyl ethers 6 b and 6d, rsp. In a similar m an­ ner, the quinones 11a, 11c, and 15 originate by reaction of two molecules diazomethane with l a via the indazoles 9 and 13, rsp. 
  Reference    Z. Naturforsch. 50b, 151—157 (1995); eingegangen am 2. August 1994 
  Published    1995 
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 Identifier    ZNB-1995-50b-0151 
 Volume    50 
27Author    Peter Dierkes, Gerlinde Frenzen, Sigrid Wocadlo, W. Erner Massa, Stefan Berger, Jürgen Pebler, Kurt DehnickeRequires cookie*
 Title    Komplexe des Typs [MCl4(SEt2)2] mit M = Mo und W. Kristallstrukturen, NMR-Spektren und magnetisches Verhalten [MCl4(SE t2)2] Complexes with M = Mo and W. Crystal Structures, NMR Spectra, and Magnetic Behaviour  
 Abstract    The crystal structures of the thioether complexes [MCl4(SEt2)2] with M = Mo and W have been solved by X-ray methods. Both compounds crystallize isotypically in the triclinic space group P I with two formula units per cell unit. The metal atoms are octahedrally coordinated by four chlorine atoms and by the two sulfur atoms of the thioether molecules in trans­ position (symmetry Q) with bond lengths (average): M o -C l 233.1, M o -S 253.4, W -C l 233.1, and W -S 251.7 pm. Both complexes were also characterized by !H and 13C NM R spectro­ scopy as well as by measurement of the magnetic susceptibilities in the tem perature range from 1.8 to 350 K. 
  Reference    Z. Naturforsch. 50b, 159—167 (1995); eingegangen am 23. August 1994 
  Published    1995 
  Keywords    D iethylthioethers of Molybdenum and Tungsten, Crystal Structure, NMR Spectra, Magnetic Susceptibility 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0159.pdf 
 Identifier    ZNB-1995-50b-0159 
 Volume    50 
28Author    W. Erner Wolfsberger, WolfgangB. Urkart, Helmut WernerRequires cookie*
 Title    Darstellung und Charakterisierung substituierter Phosphinoether und -thioether Preparation and Characterization of Substituted Phosphinoethers and -thioethers  
 Abstract    The (diorganophosphinopropyl)alkyl ethers 1 -7 are prepared by hydrophosphination of allylalkyl ethers with secondary phosphines. The corresponding thioethers cannot be ob­ tained in a pure state by the same route. The nucleophilic ring opening of thiirane with lithium dialkyl phosphides, followed by the reaction with ClSi(CH3)3 or C1(CH2)20C H 3 pro­ duces the thioethers 8 -1 2 and 16. The silylated thioethers 8, 10 and 12 react with CH3OH/ H20 to give the phosphinoethyl thiols 13-15. All new compounds have been identified and characterized by elemental analyses, IR and NM R spectra. 
  Reference    Z. Naturforsch. 50b, 168—174 (1995); eingegangen am 13. September 1994 
  Published    1995 
  Keywords    Phosphinoethers, Phosphinothioethers, Phosphinothioles, NM R Spectra 
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 Identifier    ZNB-1995-50b-0168 
 Volume    50 
29Author    Rainer PöttgenRequires cookie*
 Title    Dy3Co6Sn5 -a New Stannide with an Ordered La3A lu Type Structure  
 Abstract    O rdered La3A ln Structure, Stannide The title com pound has been obtained by arc-melting of the elemental components and subsequent annealing at 800 °C. It crystallizes in the orthorhombic space group Immm, a = 430.3(1), b = 1235.0(2), c = 967.6(3) pm, V -0.5142(2) nm3, Z = 2. The structure has been determ ined from single-crystal X-ray data and refined to R = 0.0181 for 747 F2 values and 28 variables. It is of a new type and can be described as a ternary ordered version of the binary La3A lu -type structure. Dy3Co6Sn5 is built up from DyCo2Sn2 and DyCo2Sn slabs with ThCr2Si2 and Cu3Au-like atomic arrangements, respectively. Its crystal chemistry is com­ pared with that of structurally related rare earth transition metal gallides. 
  Reference    Z. Naturforsch. 50b, 175—179 (1995); received September 5 1994 
  Published    1995 
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 Identifier    ZNB-1995-50b-0175 
 Volume    50 
30Author    M. Jansen, S. RingsRequires cookie*
 Title    Kondensationsfähige Si-N-Verbindungen zum Aufbau poröser Festkörper Condensable S i-N Compounds for the Formation of Porous Solids  
 Abstract    Siloxazanes, Cleavage of S i-N , Heterosiloxazanes of S i-N -A l, Mass Spectra, Crystal Structure Preparation and spectroscopic data of the new compounds Si30 3(N H C H 3)6 (1), Si30 2(NCH3)(N H C H 3)6 (2), (CH 3)3S i-N C H 3-S i2OCl5 (3), ((CH 3)3S i-N C H 3)2Si2OCl4 (4) and [Cl3S i-0 -S iC l2-N C H 3-A1C12]2 (5) are reported. The structure of the chlorinated alu-mmosiloxazane compound has been determined by single crystal X-ray analysis (space group P I, a = 8,357(1), b = 9,538(1), c = 9,774(1) Ä, a = 85,35(1), ß = 65,39(1), y = 71,97(1)°, 2620 data (F0 > 3 a(F 0), R = 0,040). The molecule shows four-membered A12N2 ring with Si2OCl5 groups in 
  Reference    Z. Naturforsch. 50b, 180—188 (1995); eingegangen am 25. Juli 1994 
  Published    1995 
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 Identifier    ZNB-1995-50b-0180 
 Volume    50 
31Author    Andreas Karst, Burkhardt Broschk, Joseph Grobe, Duc Le VanRequires cookie*
 Title    Neue Phospha-und Arsa-Heterocyclen aus Cyclophosphanen bzw  
 Abstract    -arsanen (ECF3)" (E = P, As; n = 4, 5) und 1,3-Dienen Novel Phospha-and Arsa-Heterocycles from Cyclophosphanes or -arsanes (ECF3)" (E = P, As; n = 4, 5) and 1,3-Dienes Reaction of the cyclotetraphosphane (PCF3)4 or of a mixture of (PCF3)4 and (PCF3)5 with 2,3-dimethyl-l,3-butadiene or isoprene at 25 C leads to the [4 + 2]-cycloadducts of bis(tri-fluoromethyl)diphosphene and the phospholene derivatives 2 a and 2 b, respectively, in the 
  Reference    Z. Naturforsch. 50b, 189—195 (1995); eingegangen am 13. Oktober 1994 
  Published    1995 
  Keywords    Trifluoromethyl-Substituted Cyclophosphanes, Cycloarsanes, Phospholenes, Diphosphinines 
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 Identifier    ZNB-1995-50b-0189 
 Volume    50 
32Author    ThorstenM. Gesing, Wolfgang JeitschkoRequires cookie*
 Title    The Crystal Structure and Chemical Properties of U 2A13C4 and Structure Refinement of A14C3  
 Abstract    A well crystallized sample o f U 2A13C4 was obtained by melting the elem ental components in a carbon crucible in a high frequency furnace. The crystal structure o f this compound was determined from single-crystal diffractometer data o f a twinned crystal: P 6 3mc, a = 342.2(1) pm. c -2323.0(3) pm. Z -2 , R -0.030 for 537 structure factors and 18 variable parameters. The structure can also be described in the higher symmetry space group P 6 3/mmc with one split aluminum position. It consists o f close packed layers of uranium and aluminum atoms with carbon atoms at interstitial sites. The structure is closely related to that of A14C3, which was refined from single-crystal X-ray data to a residual of R -0.033 for 135 F-values and 11 variables. The hydrolysis of U 2A13C4 with diluted hydrochloric acid resulted in about 74 (wt-)% methane, 8% ethane and ethylene, and 18% saturated and unsaturated higher hy­ drocarbons. 
  Reference    Z. Naturforsch. 50b, 196 (1995); received July 21 1994 
  Published    1995 
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 Identifier    ZNB-1995-50b-0196 
 Volume    50 
33Author    Bernd Wrackmeyer, Udo Dörfler, Wolfgang Milius, Max HerberholdRequires cookie*
 Title    Triferrocenylborane -Molecular Structure in Solution and in the Solid State  
 Abstract    According to a single crystal X-ray structure determination all three ferrocenyl substituents of triferrocenylborane (1) adopt the same orientation with respect to the BC3-plane [P 2 Jc\ monoclinic; Z = 4; a = 1353.5(3), b = 1695.6(3), c = 1056.4(2) pm, ß = 109.27(3)°]. The simu­ lated X-ray powder pattern of the single crystal is identical with the powder diagram o f a macroscopic sample, indicating the presence of a single diastereomer (l a) in the solid state. How ever, at low temperature (< -9 5 °C) in solution, the 13C NM R spectra suggest the pres­ ence of the second diastereomer (lb) in which one ferrocenyl group is oriented opposite to the other two with respect to the central BC3-plane. 
  Reference    Z. Naturforsch. 50b, 201—2 (1995); received July 25 1994 
  Published    1995 
  Keywords    Triferrocenylborane, 13C NMR Spectra, Dynamic Processes, X-Ray 
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 Identifier    ZNB-1995-50b-0201 
 Volume    50 
34Author    V.Salas Reyes3, C. AguilerabRequires cookie*
 Title    Synthesis and Characterization of Copper(II) and Nickel(II) Complexes Derived from «-Substituted Malondialdehydes  
 Abstract    The synthesis and characterization of two series of novel bis(4'-alkyloxyphenyl)m alondi-aldehydes of copper(II) and nickel(II), (R=C"H2"+1, n = 9, 10, 11, 12) from 2-(4'-hydroxy-phenyl)-3-dimethylamino acrolein is described. 
  Reference    Z. Naturforsch. 50b, 205 (1995); received September 28 1994 
  Published    1995 
  Keywords    M alondialdehyde, Acroleins, Formylation, M etallom esogen, Liquid Crystal 
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 Identifier    ZNB-1995-50b-0205 
 Volume    50 
35Author    Klaus Diem, Thomas Hahn, Wilhelm Kuchen+, DietrichM. Ootz+, WolfgangPeter Poll, TommesRequires cookie*
 Title    Kristallstruktur von (CO)5CrPH2COOH und ab m/r/ö-Berechnung des hypothetischen freien Liganden [H2PCOOH]2 -ein Vergleich Crystal Structure of (C O )5CrPH2CO O H and ab initio Calculation of the Hypothetical Free Ligand [H2PC O O H ] 2 -a Comparison  
 Abstract    Crystal structure analysis of (C O)5CrPH2COOH (a = 1338.2, b = 622.6, c = 1161.5 pm, ß = 96,77°, P 2 1/c, Z = 4, R -0.0330) has shown the complex to be dimerized via hydrogen-bonds of the COOH group. Geom etrical parameters of the hypothetical free ligand [H2PCO O H ]2 were calculated using the HF/3-21 G*, HF/6-31G** and MP2-FU/6-31 G** basis sets. Bond lengths and bond angles o f the calculated free ligand are similar to those derived from the crystal structure analysis of the coordinated ligand and are not significantly influenced by coordination and/or intermolecular interactions. 
  Reference    Z. Naturforsch. 50b, 209 (1995); eingegangen am 7. September 1994 
  Published    1995 
  Keywords    Crystal Structure, Chromium Complex, Phosphinoformic Acid, Hydroxycarbonylphosphine 
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 Identifier    ZNB-1995-50b-0209 
 Volume    50 
36Author    U. Berger, V. Schultz-Coulon, W. SchnickRequires cookie*
 Title    Ca2Sr[WN4], das erste gemischte Erdalkalimetall-nitridowolframat C a2Sr[WN4], the First Mixed Alkaline-Earth Nitridotungstate  
 Abstract    The title com pound has been prepared by the reaction of Sr2N and Ca3N 2 or SrCN2 and Ca3N 2 with tungsten powder under nitrogen atmosphere at 1200 °C. The structure has been determined from single crystal X-ray data (Pbca (No. 61); Z = 8; a = 1017.7(2), b = 934.4(2), c = 1131.8(2) pm; wR = 5.56% (1150 observed reflections, 73 refined parameters)) and has been found to be isotypic to the low-temperature modification of Ba3[WN4], In contrast to the yellow or orange colour of other nitridometallates, Ca2Sr[WN4] is obtained as colourless crystals. 
  Reference    Z. Naturforsch. 50b, 213 (1995); eingegangen am 8. September 1994 
  Published    1995 
  Keywords    Alkaline-Earth Nitridotungstate, Crystal Structure, Colour 
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 Identifier    ZNB-1995-50b-0213 
 Volume    50 
37Author    A. Chrissafidou, J. Fuchs, H. Hartl, R. PalmRequires cookie*
 Title    Kristallisation und Strukturuntersuchung von Alkali-Parawolframaten Crystallization and Structure Determ ination of Alkaline M etal-Paratungstates  
 Abstract    The syntheses and crystal structures of the following paratungstates-Z with different alka­ line cations are reported and discussed: N a10[H2W 120 42]-2 0 H 20 (I), N a10[H2W 12O 42]-2 7 H 20 (II), N a10[H2W 12O47] -2 8 FLO (III), K10[H2W 120 42] 1 0 H 20 (IV), K6Na4[H ,W 120 42]-1 3 H 20 (V), Cs6Na4[H?W P0 42] • 16IÜO (VI), Cs8N a2[H2W 120 42]-1 0 H 20 (VII), Cs8Na2[H2W 120 42] • 12 H20 (VIII), K3N a7[H2W 120 42] -24H 20 (IX) and KsNa2[H2W 120 42] • 12H20 (X). Priority has been set on the description of the coordination of the cations with the oxygen ligands H2W 12O 4210_ and h 2o . 
  Reference    Z. Naturforsch. 50b, 217 (1995); eingegangen am 22. Juli 1994 
  Published    1995 
  Keywords    Paratungstates-Z, Synthesis, Structure Determination, X-Ray, Cation Coordination 
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 Identifier    ZNB-1995-50b-0217 
 Volume    50 
38Author    H. Vogt, C. Frauendorf, A. Fischer, P. G. JonesRequires cookie*
 Title    Synthese und Kristallstruktur von Tribrommethyltriphenylphosphonium-bromid und Bis(tribrommethyltriphenylphosphonium)-tribroniid-bromid Synthesis and Crystal Structure of Tribrom om ethyltriphenylphosphonium Bromide and Bis(tribrom omethyltriphenylphosphonium ) Tribromide Bromide  
 Abstract    Tribromotriphenylphosphonium bromide 1 has been prepared by the reaction o f triphenyl-phosphine with tetrabromomethane in dichloromethane. Colourless crystals were obtained by recrystallization from the same solvent. The^ light-sensitive crystals change colour to yel­ 
  Reference    Z. Naturforsch. 50b, 223 (1995); eingegangen am 28. Septem ber 1994 
  Published    1995 
  Keywords    Tribromomethyltriphenylphosphonium Bromide, Bis(tribromomethyltriphenylphosphonium) Tribromide Bromide, Synthesis, Crystal Structure 
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 Identifier    ZNB-1995-50b-0223 
 Volume    50 
39Author    Dagm Ar, Henschel Arm, Blaschette, PeterG. JonesRequires cookie*
 Title    Polysulfonylamine, LXIV [1] Wasser-Dimere und Wasser-Monomere als Bindeglieder in Komplexen von 18-Krone-6 mit ungeladenen aciden Molekülen: Synthese und Kristallstrukturen von (CH2CH20 ) 6 * 4 H20 * 2 H N(S02Ph)2 und (CH2CH20 ) 6 * 2 HzO * 2 H N (S02C6H4-4 -F)2 sowie Struktur des freien H N (S02C6H4-4 -F )2 Polysulfonylamines, LXIV [1] W ater Dimers and Water Monomers as Links in 18-Crown-6 Complexes with U ncharged Acidic Molecules: Syntheses and Crystal Structures of (CH2CH20 ) 6 * 4 H20 * 2 H N (S 02Ph)2 and (CH2CH20 ) 6 * 2 H zO * 2 H N (S 0 2 C6H4-4 -F) 2 and Structure of Free H N (S 0 2 C6H4-4 -F ) 2 Di(arenesulfonyl)amines, 18-Crown-6, Complexes of Uncharged Molecules, Crystal Structure The ternary complexes 18C 6-4H 20 -2 H N ( S 0 2Ph)2 (3) and 18C 6-2H 20 -2 H N ( S 0 2C6H 4  
  Reference    Z. Naturforsch. 50b, 229 (1995); eingegangen am 22. Septem ber 1994 
  Published    1995 
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 Identifier    ZNB-1995-50b-0229 
 Volume    50 
40Author    Evamarie Hey-Hawkins+, Stefan Kurz, G.Erhard BaumRequires cookie*
 Title    P-H-funktionelle Zirkonocen-Phosphido-Komplexe  
 Abstract    Synthese von Cp'2Zr{PH(2,4,6-Pr'3C6H2)}(X) (Cp = C5H4Me, X = Cl, 2,4,6-Pr'3C6H2) und Molekülstruktur von Cp'2ZrCl{PH(2,4,6-Pr/3C6H2)} P-H -Functionalized Zirconocene Phosphido Complexes -Synthesis of C p '2Zr{PH(2,4,6-Pr'3C6H 2)}(X) (Cp' = C5H 4 Me, X = Cl, 2,4,6-Pr'3C6H 2) and Molecular Structure of C p '2ZrCl{PH(2,4,6-Pr'3C6H 2)} The reaction of Cp'2ZrCl2 (Cp' = C5H4M e) with solvent-free LiPH(2,4,6-Pr'3C6H 2) yields the terminal zirconocene phosphido com plexes Cp'2ZrCl{PH(2,4,6-Pr'3C6H 2)} (1) (1:1 reac­ tion) or Cp'2Zr{PH(2,4,6-Pr'3C6H2)}2 (2) (1:2 reaction). 1 and 2 were characterized spectro­ scopically (NMR, IR, MS). An X-ray structure determination was carried out on 1 (Z r -P 2.6381(8) A, Z r-C l 2.4547(6) A , C l-Z r -P 93.55(2)°). 
  Reference    Z. Naturforsch. 50b, 239 (1995); eingegangen am 15. Septem ber 1994 
  Published    1995 
  Keywords    Zirconocene Phosphido Complexes, Lithium 2, 4, 6-Triisopropylphenylphosphide, Crystal Structure 
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 Identifier    ZNB-1995-50b-0239 
 Volume    50 
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