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1997[X]
1Author    Annette Jung, Gotthelf WolmershäuserRequires cookie*
 Title    Bromierung von "Poly(l,4-diselenobenzol)"  
 Abstract    Poly(l,4-diselenobenzene)", obtained by reaction of 1,4-dibromobenzene with disodiumdi-selenide is shown to contain many different polymer sequences. Bromination of the polymer yields a variety of low molecular weight species thus confirming the non-uniformity of the polymer and giving some hints about its composition. The aryl-selenium-bromine compounds 1,4-benzene-diselenenyldibromide, 4,4'-di(bromoselenenyl)-diphenylseleniumdibromide, and bromo-bis(4-bromophenyl)selenonium hexachloroantimonate were fully characterised inclu­ ding X-ray structure determinations. 
  Reference    Z. Naturforsch. 52b, 345—350 (1997); eingegangen am 11. November 1996 
  Published    1997 
  Keywords    Selenium Compounds, Polymers, Crystal Structure " 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0345.pdf 
 Identifier    ZNB-1997-52b-0345 
 Volume    52 
2Author    Christian Meyer3, Dietrich Mootza, Birgit Bäckb, Rolf MinkwitzbRequires cookie*
 Title    Bis(trifluormethyl)disulfan und -trisulfan: Molekülgeometrie im festen Zustand [1] Bis(trifluoromethyl)disulfane and Trisulfane: Molecular Geometry in the Solid State [1]  
 Abstract    The solid-state structures of the low-melting compounds bis(trifluoromethyl)disulfane (CF3SSCF3, triclinic, space group P I, Z = 2) and bis(trifluoromethyl)trisulfane (CF3SSSCF3, monoclinic, space group C2/c, Z = 4) have been determined on single crystals with M oK a radiation at -160°C. The trisulfane has trans conformation. The geometry of both molecules agrees well with results of electron diffraction on the gaseous state. A comparison is made also with the crystal structures of the related molecules CF3TeTeCF3 and CF3OOOCF3. 
  Reference    (Z. Naturforsch. 52b, 69—71 [1997]; eingegangen am 15. Juli 1996) 
  Published    1997 
  Keywords    Conformation, Crystal Structure, Sulfane 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0069.pdf 
 Identifier    ZNB-1997-52b-0069 
 Volume    52 
3Author    OctahedraC. Wadewitz, Hk Müller-BuschbaumRequires cookie*
 Title    Ba  
 Abstract    (V0)4(As0 4)2(As20 7): Ein neues Divanadyl(IV)-Arsenat mit flächenverknüpften V20 8+1-Oktaederdoppeln Ba(V0)4(As0 4)2(As20 7): A New Divanadyl(IV)-Arsenate Containing Face Shared V20 8+, Double A new alkaline earth vanadyl arsenate Ba(V0)4(As0 4)2(As2 0 7) has been synthesized by solid state reactions in closed quartz tubes. X-ray investigations led to orthorhombic symmetry, space group D2£-Pnma, a = 17.540(2), b = 7.6223(8), c = 11.0633(12) A, Z = 4. The crystal structure is characterized by A s 0 4 single and As20 7 double tetrahedra and face shared asymmetric stretched V20 8+, double octahedra, forming a network of polyhedra. The incorporated Ba2+ ions show 12-fold coordination by oxygen. Ba(V 0)4(A s0 4)2(As20 7) is the first vanadyl compound containing V20 8 divanadyl groups originating from face sharing stretched V 0 5+l octahedra. 
  Reference    (Z. Naturforsch. 52b, 83—87 [1997]; eingegangen am 21. August 1996) 
  Published    1997 
  Keywords    Barium, Vanadyl Arsenate, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0083.pdf 
 Identifier    ZNB-1997-52b-0083 
 Volume    52 
4Author    Z. NaturforschRequires cookie*
 Title      
 Abstract    The crystal structures of PbMe3I and BiPh2Cl have been determined by X-ray methods. Both compounds form polymeric chains via bent [i2-ha-logeno bridges and almost linear X-M-X units (X = I, Cl). 
  Reference    Z. Naturforsch. 52b, 149—152 (1997); eingegangen am 20. September 1996 
  Published    1997 
  Keywords    Lead, Bismuth Compounds, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0149_n.pdf 
 Identifier    ZNB-1997-52b-0149_n 
 Volume    52 
5Author    Amo Pfitzner, Eva FreudenthalerRequires cookie*
 Title    (CuI)2Pi4* ein neues Phosphorpolymer in einer Kupferhalogenid-Matrix (CuI)2P 14: a Novel Phosphorus Polymer in a Copper Halide Matrix  
 Abstract    (CuI)2Pi4 is a new adduct of copper iodide to a neutral phosphorus polymer. It is obtained by reaction of Cul and Pred at 400 °C. The compound crystallizes monoclinically, space group P2,/c (No. 14), a = 9.919(2), b = 9.718(2), c = 16.478(3) Ä, ß = 105.71(1)°, V = 1529.0(7) A3, with Z = 4. The crystal structure was refined to R\ = 0.029 for 2680 reflections and 173 parameters. It contains a new polymeric phosphorus allotrope with the translational unit P^° consisting of experimentally unknown [PI2] groups which are linked by [P2] fragments. The phosphorus rods consist of five-and six-membered rings, and are coordinated only by copper atoms. 
  Reference    Z. Naturforsch. 52b, 199—202 (1997); eingegangen am 11. September 1996 
  Published    1997 
  Keywords    Phosphorus, Copper Compounds, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0199.pdf 
 Identifier    ZNB-1997-52b-0199 
 Volume    52 
6Author    Olaf Reckeweg, H.-Jürgen MeyerRequires cookie*
 Title    Unsymmetrische BN23'-Ionen in den Strukturen von Ca2ClBN2 und Sr2ClBN2. Unsymmetric BN23~-Ions in the Structures of Ca2ClBN2 and Sr2ClBN2  
 Abstract    The new compounds Ca2ClBN2 (1) and Sr2ClBN2 (2) were prepared from the respective metal, its dihalide and h-BN in sealed tantalum ampoules at 1200 °C. The crystals obtained were transparent yellow (1) and blue (2), respectively. The crystal structures were determined from single crystal X-ray data. Ca2ClBN2 and Sr2ClBN2 are isotypic and crystallize in the orthorhombic space group Pnma (No. 62), Z = 4 (Ca2ClBN 2: a = 1166.7(2), b = 390.26(4), c = 899.8(1) pm, R 1 = 0.043, wR2 = 0.115 for 554 independent reflections; Sr-,C1BNT: a = 1242.8(1), b = 416.75(4), c = 920.8(1) pm, R\ = 0.031, wR2 = 0.054 for 6 6 2 'independent reflections). The structures contain two different layers of M 2+, C P and BN23~ alternating along the [010] direction. The bond angles N-B-N are 177.2(4)° for (1) and 176,6(5)° for (2), the bond distances of the BN23_ ions are dB_ N] = 134.6(5) pm for (1), 136,3(7) pm for (2) and dg_N2 = 132.4(5) pm for (1) and 131,3(7) pm for (2). The unsymmetric structure of the BN23~ ion, as is manifested particularly in the Sr compound (2), is caused by the coordination of N 1 to four cations while N2 is coordinated only to three. 
  Reference    Z. Naturforsch. 52b, 340—344 (1997); eingegangen am 12. November 1996 
  Published    1997 
  Keywords    Boronitrides, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0340.pdf 
 Identifier    ZNB-1997-52b-0340 
 Volume    52 
7Author    Uwe Klingebiel, Mathias Noltemeyer, Hans-Jörg RakebrandtRequires cookie*
 Title    Difluorphosphorylcyclosilazane -Synthese und Kristallstruktur Difluorophosphorylcyclosilazanes -Syntheses and Crystal Structure  
 Abstract    The reaction of lithiated l,3-bis(fluorodimethyl)cyclotrisilazane with PF3 leads to the formation of a PF2-substituted six-membered Si-N ring (1). 1,5-Bis(difluorophosphanyl)-2,2,4,4,6,6,8,8-octamethyl-cyclotetrasilazane (2) is obtained in the reaction of the dilithium derivative of the cyclic tetrasilazane with trifluorophosphane in a molar ratio 1:2. The crystal structure of (F2P-N-SiMe2-NH-SiMe2)2 (2) has been determined. 
  Reference    Z. Naturforsch. 52b, 775—777 (1997); eingegangen am 14. April 1997 
  Published    1997 
  Keywords    Fluorophosphorylcyclosilazanes, Silicon, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0775.pdf 
 Identifier    ZNB-1997-52b-0775 
 Volume    52 
8Author    Pb2ln2si209, J.-P Werner, Hk Müller-BuschbaumRequires cookie*
 Title    Zur Kenntnis eines synthetischen Kentrolits/Melanotekits des Indiums: On an Synthetic Kentrolite/Melanotekite of Indium: Pb2In2Si20 9  
 Abstract    Single crystals of Pb2In2Si20 9 have been prepared by crystallisation from melts of Pb(N 03)2, ln20 3 and S i0 2. The compound crystallizes with orthorhombic symmetry, space group C2v-Pna2| with the lattice constants a = 10.529(1),/?= 11.372(1) and c = 7.019(3) A, Z = 4. Despite the fact that the Kentrolite/Melanotekite structure is characterized by dissimilar occupied split positions of lead, Pb2In2Si20 9 shows completely filled and ordered point positions. The location of a dot like lone pair of Pb~+ is estimated by Coulomb term calculations of lattice energy. The results are discussed with respect to published Pb-lone pair distances using the electronic polarizability coefficient of the lone pair cation or simple geometrical considerations. 
  Reference    Z. Naturforsch. 52b, 1213—1218 (1997); eingegangen am 8. Juli 1997 
  Published    1997 
  Keywords    Lead, Indium, Silicate, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-1213.pdf 
 Identifier    ZNB-1997-52b-1213 
 Volume    52 
9Author    Stefan DickRequires cookie*
 Title    Die Struktur von GaAs0 4 *2 H20 : Ein neues Mitglied der Variscit-Familie The Structure of GaAsC>4-2 H20 : A New M ember of the Variscite Family  
 Abstract    GaAs0 4 -2 FF0 was synthesized hydrothermally from Ga2Ü3 and a K+-AsC>4~ solution at pH=2. A single crystal structure determination showed that GaAs0 4 -2H20 is isotypic with variscite and therefore the first gallium arsenate with octahedrally coordinated Ga(III). Crys­ tal data: space group Pbca, a = 1016,0(1), b = 886,2(1), c = 994. 1(1) pm, R g = 0,0266. GaAs0 4 -2 H2 0 dehydrates at 439 K with formation of an amorphous material and poor cry­ stalline GaAsC>4. The crystal data of all known compounds with variscite structure have been compiled. 
  Reference    Z. Naturforsch. 52b, 1337—1340 (1997); eingegangen am 27. Juni 1997 
  Published    1997 
  Keywords    Gallium Arsenate, Crystal Structure, Variscite 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-1337.pdf 
 Identifier    ZNB-1997-52b-1337 
 Volume    52 
10Author    Hiroyuki Ishida, Hiroshi Ono, Ryuichi IkedaRequires cookie*
 Title    Crystal Structure of the High-temperature Solid Phases of Choline Tetrafluoroborate and Iodide  
 Abstract    The crystal structure of the highest-and second highest-temperature solid phases of choline tetrafluoroborate and iodide was determined by X-ray powder diffraction. The structure in the highest-temperature phase of both salts is NaCl-type cubic (a = 10.16(2) Ä, Z = 4 for tetrafluorobo-rate; a = 10.08(2) A, Z = 4 for iodide). The second highest-temperature phase of tetrafluoroborate and iodide is CsCl-type cubic (a = 6.198(6) Ä and Z = 1) and tetragonal (a = 8.706(2) A, c = 6.144(6) Ä, and Z = 2), respectively. DSC was carried out for the iodide, where the presence of three solid-solid phase transitions was confirmed. Enthalpy and entropy changes of these transitions were evaluated. 
  Reference    Z. Naturforsch. 52a, 679—680 (1997); received June 17 1997 
  Published    1997 
  Keywords    Crystal structure, Powder X-ray diffraction, Phase transition 
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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0679_n.pdf 
 Identifier    ZNA-1997-52a-0679_n 
 Volume    52 
11Author    B. W. Edel, HkM. Üller-B, UschbaumRequires cookie*
 Title    Über die Kristallstrukturen der Tellurate Pb3Fe2Te20 12 und Pb2CoTe06  
 Abstract    Pb3Fe2Te20 |2 (I) and Pb2C oT e06 (II) have been prepared by crystallization from melts. Single crystal X-ray investigations led to monoclinic (I) and tetragonal (II) symmetry, space groups Cs-Cc and D{J-I4/mmm. Lattice constants I: a = 9.866(3), b = 15.332(4), c = 7.172(2) A, ß = 111.34(3)°, Z = 4. II: a = 5.661(5), c = 8.004(7) A, Z = 2. (I) represents a new crystal structure, characterized by a network of octahedra occupied by Fe + and Te6+ in a disordered manner. The centres of negative charge of the lone pairs of Pb2+ in I are estimated by Coulomb term calculations. II belongs to the elpasolithe type. 
  Reference    (Z. Naturforsch. 52b, 35—39 [1997]; eingegangen am 2. September 1996) 
  Published    1997 
  Keywords    Lead, Iron, Cobalt, Tellurium Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0035.pdf 
 Identifier    ZNB-1997-52b-0035 
 Volume    52 
12Author    K. Bluhm, C. H. ParkRequires cookie*
 Title    Die Synthese und Kristallstruktur des Borat-Phosphats: a -Zn3(B0 3)(P04) Synthesis and Crystal Structure of the Borate-Phosphate: Q-Zn3(B 0 3)( P 0 4)  
 Abstract    Single crystals of the compound a -Z n 3(B 0 3)(P 0 4) were obtained at 1050 °C by using B20 3, P20 5 and Z n C 0 3 as starting materials and subsequent cooling to 600°C with 20°C/h. X-ray investigations on single crystals yield a new crystal structure in the monoclinic space group Cm -(Nr. 8) with a = 972.5(2); b = 1272.0(3); c = 487.4(3) pm; 0 = 1 1 9 .8 0 (4)°; Z = 4. The structure contains isolated trigonally planar B 0 3 and tetrahedral P 0 4 units which are not joined together. Zinc occupies three crystallographically different point positions and is trigonal-bipyramidally, tetragonal-pyramidally or distorted tetrahedrally coordinated by oxygen. 
  Reference    (Z. Naturforsch. 52b, 102—106 [1997]; eingegangen am 16. August 1996) 
  Published    1997 
  Keywords    Zinc, Borate, Phosphate, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0102.pdf 
 Identifier    ZNB-1997-52b-0102 
 Volume    52 
13Author    Z. NaturforschRequires cookie*
 Title      
 Abstract    Single crystals of (Me3Sn)3CCN were obtained by the reaction of tris(trimethylstannyl)amine with boiling acetonitrile in the presence of potas­ sium fluoride and trimethylarsane. The compound has been characterized by IR spectroscopy and by a crystal structure determination. Space group 
  Reference    Z. Naturforsch. 52b, 145—148 (1997); eingegangen am 7. Oktober 1996 
  Published    1997 
  Keywords    Tin Compound, Synthesis, IR Spectra, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0145_n.pdf 
 Identifier    ZNB-1997-52b-0145_n 
 Volume    52 
14Author    Stefan Dick, Armin WeissRequires cookie*
 Title    Neue dreizähnige Liganden vom Typ N-AlkyI-N,N-bis(2-pyridylmethyl)amin New Tridentate Ligands of the Type N-Alkyl-N,N-bis(2-pyridylmethyl)amine  
 Abstract    New tridentate ligands of the type N-alkyl-N,N-bis(2-pyridylmethyl)amine (alkyl = me­ thyl, benzyl, adamantyl) have been synthesized by reaction of alkylamines with 2 -(chlor-methyl)pyridine in alkaline solution. These amines are preferably isolated and stored as per­ chlorates. The perchlorate of the methyl substituted ligand has been crystallized in two modifi­ cations that differ in the twisting of the aromatic rings and in the coordination of the perchlorate anions. 
  Reference    Z. Naturforsch. 52b, 188—192 (1997); eingegangen am 1. August 1996 
  Published    1997 
  Keywords    Tridentate Amine, Perchlorate Salt, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0188.pdf 
 Identifier    ZNB-1997-52b-0188 
 Volume    52 
15Author    Borate Anion, A. Wiesch, K. BluhmRequires cookie*
 Title    AgSrfByO^]: Das erste wasserfreie quaternäre Silber(I)-Borat mit vierfach koordiniertem Silberion und einem neuartigen Boratanion AgSr[B70 12]: The First Anhydrous Quaternary Silver(I)-Borate with Fourfold Coordinated Silver Ion and a New  
 Abstract    Single crystals of AgSr[B70 , 2] were obtained by using a B20 3 flux-technique and Ag2C 0 3 and SrC 03 as starting materials in a silver ampoule at 800 °C. X-ray investigations on single crystals led to the space group C 2/c with a = 664.2(5); b = 1153.6(3); c = 2198.0(6) pm; ß = 92,52(3)°; Z = 8. Ag+ is fourfold coordinated by oxygen atoms and forms distorted A g04 tetrahedra while Sr2+ has nine nearest neighbours. The compound contains a hitherto unknown two dimensional borate anion [B70 i 2]3-which contains four trigonal planar B 0 3 groups and three B 0 4 tetrahedra per unit. 
  Reference    Z. Naturforsch. 52b, 227—230 (1997); eingegangen am 9. September 1996 
  Published    1997 
  Keywords    Silver, Strontium, Borate, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0227.pdf 
 Identifier    ZNB-1997-52b-0227 
 Volume    52 
16Author    Matthias Krieger3, Klaus Harms3, Jörg Magullb, Kurt Dehnicke3Requires cookie*
 Title    Phosphanimin-und Phosphaniminato-Komplexe des  
 Abstract    Zinks. Kristallstrukturen von [ZnCl2(Me3SiNP(CH2)4CMe3)]2, [ZnI2(Me3SiNPEt3)]2, [ZnI2{Me2Si(NPEt3)2 }] und [ZnBr(NPMe3)]4 CH2Cl2 Phosphaneimine and Phosphoraneiminato Complexes of Zinc. Crystal Structures of [ZnCl2(M e3SiNP(CH2)4CM e3)]2, [ZnI2(Me3SiNPEt3)]?, [Znl2{Me2Si(NPEt3)2}], and [ZnBr(NPMe3)]4 CH2Cl2 The donor-acceptor complexes [ZnCl2(Me3SiNP(CH2)4CMe3)]2 (l)and [ZnI2(Me3SiNPEt3)]2 (2) have been prepared from the zinc dihalides and the corresponding silylated phosphaneimi-nes in CH2C12. Thermolysis of 2 leads to the formation of [ZnI2(Me2Si(NPEt3)2)] (3). Znl2 and ZnBr2 react with the silylated phosphaneimines Me3SiNPR3 (R = Me, Et) in the presence 
  Reference    Z. Naturforsch. 52b, 243—250 (1997); eingegangen am 1. August 1996 
  Published    1997 
  Keywords    Zinc Compounds, Phosphoraneiminato Complexes, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0243.pdf 
 Identifier    ZNB-1997-52b-0243 
 Volume    52 
17Author    W. SchnickRequires cookie*
 Title    Synthesen, Kristallstrukturen und Eigenschaften von Trisilber-und Trikalium-tri-/x-imido-cyclotriphosphat, Ag3(P 0 2NH)3 und K3(P 0 2NH)3 Syntheses, Crystal Structures, and Properties of Trisilver and Tripotassium Tri-^-im ido Cyclotriphosphate, Ag3(P 0 2N H)3 and K3(P 0 2N H)3 N. Stock  
 Abstract    Coarse crystalline Ag3(P 0 2NH)3 (1) and K3(P 0 2NH)3 (2) are obtained by addition of an aqueous solution of A gN 03 to an acidified solution of Na3(P 0 2NH)3 • 4H20 and by diffusion controlled addition of ethanol to a solution of K3(P 0 2NH)3 in water, respectively. The crystal structures of 1 and 2 have been determined by single crystal X-ray methods (Ag3(P 0 2NH)3: P2,/c; a = 1166.6(1), b = 786.4(1), c = 997.8(1) pm, ß = 106.91(1)°; Z = 4. K3(P 0 2NH)3: R3; a = 1271.4(2), c = 1017.9(2) pm, Z = 6). In Ag3(P 0 2NH)3 the cyclic anion is markedly distorted because of interactions between Ag+ and one nitrogen atom of the anion. In K3(P 0 2NH)3 the trimetaphosphimate ring shows a chair conformation and two cyclic anions are connected to each other by hydrogen bonds. DTA/TG investigations show thermal decomposition above 275 and 250 °C for 1 and 2, respectively. 
  Reference    Z. Naturforsch. 52b, 251—255 (1997); eingegangen am 14. November 1996 
  Published    1997 
  Keywords    Trimetaphosphimate, Synthesis, Crystal Structure, Thermal Property 
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 Identifier    ZNB-1997-52b-0251 
 Volume    52 
18Author    LarisaA. Kovbasyuk3, Olga Yu, Vassilyeva3, VladimirN. Kokozay3, Wolfgang LinertbRequires cookie*
 Title    Crystal Structure of the Di-bromo-bis(2-dimethylaminoethanolato)(dime- thylsulfoxide)-copper(II)-lead(II) Dimer Obtained by Direct Synthesis  
 Abstract    A heterotetranuclear C unPbu complex containing 2-dimethylaminoethanol has been synthesized, using copper powder and PbB n as starting materials, and character­ ized by X-ray crystallography. The crystal is composed of centrosymmetric molecules [C uP b B ^ K C H ^N C F b C F L O j^ d m so h . The central strictly planar fragment is a Pb2Ü2 paral­ lelogram completed by bridging oxygen atoms of chelating 2-dimethylaminoethoxo groups. The Pb atom forms four quite short bonds with oxygen atoms of the three 2-dimethylaminoethoxo groups and of the dmso molecule and assumes a six-coordinate structure also involving two bromine atoms. The two oxygen and two nitrogen atoms of two 2-dimethylaminoethoxo groups form the copper coordination environment, which possesses a somewhat distorted square planar geometry. 
  Reference    Z. Naturforsch. 52b, 337—339 (1997); received July 30 1996 
  Published    1997 
  Keywords    Heteronuclear Complexes, Crystal Structure, Direct Synthesis 
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 Identifier    ZNB-1997-52b-0337 
 Volume    52 
19Author    Gerhard Bringmann3, Andreas Wuzika, Olaf Schuppa, Karl Peters13, Eva-Maria PetersbRequires cookie*
 Title    l,3-Di-terf-butyl-6//-benzo[b]naphtho[l,2-d]pyran-6-thione, a Severely Helically Distorted Thionolactone-Bridged Biaryl  
 Abstract    The title compound 2c, a potentially useful synthetic intermediate in stereoselective biaryl synthesis, has been prepared from the oxolactone lc, by treatment with Lawesson's reagent. An X-ray structure analysis reveals its strongly helically distorted structure, the overall molecular distortion even slightly exceeding that of the corresponding oxo compound lc. 
  Reference    Z. Naturforsch. 52b, 355—358 (1997); received October 18 1996 
  Published    1997 
  Keywords    Crystal Structure, Thionolactone, Bridged Biaryl, Biaryl Coupling, Stereochemistry 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0355.pdf 
 Identifier    ZNB-1997-52b-0355 
 Volume    52 
20Author    J.-P Werner, Hk Müller-BuschbaumRequires cookie*
 Title    Elektroneutrale Pb40 4 -Heterokubaneinheiten in den Aluminatsodalithen Ln4[Al12024](Pb404)2 (Ln = Nd, Sm) Electrically Neutral Pb40 4 Heterocubane Units in Aluminate Sodalites Ln4[A l,2 0 24](Pb4 0 4 )2 (Ln = Nd, Sm)  
 Abstract    Single crystals of Ln4[A lI20 24](Pb40 4)2 (Ln = Nd, Sm) have been prepared by flux techni­ ques. The compounds crystallize with cubic symmetry, space group Oh-Pn3m, a ^ = 9.514(1), asm = 9.481(1) A, Z = 1. The crystal structure is characterized by a [A1120 24] U~ framework. Four of the eight six-membered rings of A104-tetrahedra per sodalite cage are centered by Ln3+ ions. The cages of the resulting electrically neutral network are filled with [Pb40 4]±) heterocubane units. Oxygen of the heterocubane units completes the coordination spheres of the rare earth ions to hexagonal bipyramids. 
  Reference    Z. Naturforsch. 52b, 449—452 (1997); eingegangen am 17. Januar 1997 
  Published    1997 
  Keywords    Lead, Rare Earth, Aluminate Sodalite, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0449.pdf 
 Identifier    ZNB-1997-52b-0449 
 Volume    52 
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