ZfN: Search Results

Browse byFacets

Bookbag ( 0 )

Search Crystal andstructure in keywords [X]
Facet Publication Year 1997 [X]

Results 75 Items

1

1	Author	Christian Meyer3, Dietrich Mootza, Birgit Bäckb, Rolf Minkwitzb	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-0069.pdf
	Identifier	ZNB-1997-52b-0069
	Volume	52

2	Author	OctahedraC. Wadewitz, Hk Müller-Buschbaum	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-0083.pdf
	Identifier	ZNB-1997-52b-0083
	Volume	52

3	Author	Z. Naturforsch	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-0149_n.pdf
	Identifier	ZNB-1997-52b-0149_n
	Volume	52

4	Author	Amo Pfitzner, Eva Freudenthaler	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-0199.pdf
	Identifier	ZNB-1997-52b-0199
	Volume	52

5	Author	Olaf Reckeweg, H.-Jürgen Meyer	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-0340.pdf
	Identifier	ZNB-1997-52b-0340
	Volume	52

6	Author	Uwe Klingebiel, Mathias Noltemeyer, Hans-Jörg Rakebrandt	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-0775.pdf
	Identifier	ZNB-1997-52b-0775
	Volume	52

7	Author	Pb2ln2si209, J.-P Werner, Hk Müller-Buschbaum	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-1213.pdf
	Identifier	ZNB-1997-52b-1213
	Volume	52

8	Author	Stefan Dick	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-1337.pdf
	Identifier	ZNB-1997-52b-1337
	Volume	52

9	Author	Hiroyuki Ishida, Hiroshi Ono, Ryuichi Ikeda	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_A/52/ZNA-1997-52a-0679_n.pdf
	Identifier	ZNA-1997-52a-0679_n
	Volume	52

10	Author	B. W. Edel, HkM. Üller-B, Uschbaum	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-0035.pdf
	Identifier	ZNB-1997-52b-0035
	Volume	52

11	Author	K. Bluhm, C. H. Park	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-0102.pdf
	Identifier	ZNB-1997-52b-0102
	Volume	52

12	Author	Z. Naturforsch	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-0145_n.pdf
	Identifier	ZNB-1997-52b-0145_n
	Volume	52

13	Author	Stefan Dick, Armin Weiss	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-0188.pdf
	Identifier	ZNB-1997-52b-0188
	Volume	52

14	Author	Borate Anion, A. Wiesch, K. Bluhm	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-0227.pdf
	Identifier	ZNB-1997-52b-0227
	Volume	52

15	Author	Matthias Krieger3, Klaus Harms3, Jörg Magullb, Kurt Dehnicke3	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-0243.pdf
	Identifier	ZNB-1997-52b-0243
	Volume	52

16	Author	W. Schnick	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-0251.pdf
	Identifier	ZNB-1997-52b-0251
	Volume	52

17	Author	LarisaA. Kovbasyuk3, Olga Yu, Vassilyeva3, VladimirN. Kokozay3, Wolfgang Linertb	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-0337.pdf
	Identifier	ZNB-1997-52b-0337
	Volume	52

18	Author	Annette Jung, Gotthelf Wolmershäuser	Requires 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 "
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-0345.pdf
	Identifier	ZNB-1997-52b-0345
	Volume	52

19	Author	Gerhard Bringmann3, Andreas Wuzika, Olaf Schuppa, Karl Peters13, Eva-Maria Petersb	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-0355.pdf
	Identifier	ZNB-1997-52b-0355
	Volume	52

20	Author	J.-P Werner, Hk Müller-Buschbaum	Requires 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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-0449.pdf
	Identifier	ZNB-1997-52b-0449
	Volume	52

1