ZfN: Search Results

Browse byFacets

Bookbag ( 0 )

Search Crystal andStructures in keywords [X]
Facet Publication Year 1987 [X]

Results 32 Items

1

1	Author	Roland Zagler, Brigitte Eisenmann, Herbert Schäfer	Requires cookie*
	Title	Tritelluride mit komplexierten Kationen: Darstellung und Kristallstruktur von [Ba(en) 3 ]Te 3 und [Ba(en) 4;5 ]Te 3 Tritellurides of Complex Cations: Synthesis and Crystal Structure of [Ba(en) 3 ]Te 3 and [Ba(en) 4 5 ]Te 3
	Abstract	The two title compounds have been prepared by reaction of appropriate mixtures of the elements in ethylenediamine. The structures have been determined on the basis of single crystal data. [Ba(en) 3 ]Te 3 crystallizes in the monoclinic system, space group P2 (/c with a = 918.0(4), b — 1203.7(6), c = 1639.9(6) pm, ß = 93.4(1)°. In the structure there are bent tritelluride anions Te 3 2 ~ (bond lengths 273.9—278.5 pm, bond angle 105.7°). The Ba 2+ cations are six coordinate by the bidentate ligand ethylenediamine. [Ba(en) 4 5 ]Te 3 crystallizes in the monoclinic system, space group Cc with a = 1752.8(6), b = 938.9(4), c = 3041.7(8) pm, ß = 91.3(1)°. In this structure the bond lengths in the Te 3 2 ~ anions are shorter (272.1—273.1 pm, bond angles 110.9—112.2°). The cations are coordinated by four bidentate ligands, and are connected into pairs by a further ethylenediamine molecule. The resulting dinuclear [Ba(en) 4 ]en[Ba(en) 4 ] 4+ units have the Ba 2+ cations in CN 9.
	Reference	Z. Naturforsch. 42b, 151—156 (1987); eingegangen am 7. 0ktober/20. November 1986
	Published	1987
	Keywords	Tellurides, Polyanions, Crystal Structure
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/42/ZNB-1987-42b-0151.pdf
	Identifier	ZNB-1987-42b-0151
	Volume	42

2	Author	H. Erbert, W. Roesky, Nasreddine Benm, Oham Ed, Klaus Keller, Nayla Keweloh, M. Athias, N. Oltem Eyer, GeorgeM. Sheldrick	Requires cookie*
	Title	Synthesis and Crystal Structure of Seven-M em bered Sulfur Nitrogen Rings Containing Carbon
	Abstract	The reaction of C1SCF2CF2SC1 and (Me3SiN)2SR2 proceeds with formation of the seven-mem-bered ring compounds 4a, R = CH3, and 4b, R = C2H 5. 4a was shown by an X-ray structure determination to contain a non-planar ring system.
	Reference	Z. Naturforsch. 42b, 1249—1252 (1987); eingegangen am 5. Mai 1987
	Published	1987
	Keywords	Crystal Structure, Sulfur, Nitrogen
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/42/ZNB-1987-42b-1249.pdf
	Identifier	ZNB-1987-42b-1249
	Volume	42

3	Author	Siegfried Pohl, Wolfgang Saak, Detlev Haase	Requires cookie*
	Title	Darstellung und Kristallstrukturen von (Ph4P)4Sb8I28 und (Ph4P)Sb3l 10 (Ph = C6H5) Synthesis and Crystal Structures of (Ph4P)4Sb8I28 and (Ph4P)Sb3 l 1 0 (Ph = C6H 5)
	Abstract	The compounds (Ph4P)4Sb8l 28 (1) and (Ph4P)Sb,Iio (2) were prepared by the reaction of Sbl3 and Ph4PI in acetonitrile (molar ratios 2:1 and 3:1 respectively). The structures of 1 and 2 were determined from single crystal X-ray diffraction data. 1 crystallizes in the triclinic space group P I with a = 1321.7(5), b = 1346.7(5), c = 2201.8(8) pm, a = 104.18(2), ß = 99.92(2), y = 100.33(2)°; 2: monoclinic, C2/c, a = 2371.1(2), b = 745.0(1), c = 2495.1(2) pm, ß = 100.75(1)°. Whereas 1 exhibits isolated SbsI284' ions, the anions of 2 are built up of polymeric chains [Sb3I 10_]x. In both compounds the distorted Sbl6 octahedra are linked by common edges. The Sb—I distances are in the range between 277.4 and 354.8 pm (1) and between 277.4 and 342.4 pm (2). The observed structures do not only depend on stoichiometry. the nature of the counter cations, and the possibility of oligomerisation but also on the wide variety of the Sb—I bond strengths and the different bridges formed by iodine. The lone pair of Sb(III) seems to be predominantly 5s: .
	Reference	Z. Naturforsch. 42b, 1493—1499 (1987); eingegangen am 30. Juni 1987
	Published	1987
	Keywords	Iodoantimonates, Synthesis, Crystal Structure
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/42/ZNB-1987-42b-1493.pdf
	Identifier	ZNB-1987-42b-1493
	Volume	42

4	Author	Bernward Engelen, Willi Buchmeier, HeinzDieter Lutz	Requires cookie*
	Title	Zur Polymorphie des Cadmiumsulfits, Kristallstrukturen von CdS0 3 -I, CdS0 3 -II und CdS0 3 -III Polymorphic Cadmium Sulfites, Crystal Structures of CdS0 3 -I, CdS0 3 -II, and CdSO r III
	Abstract	The crystal structures of the anhydrous cadmium sulfites CdS0 3 -I (¥2 x /c, Z=4), CdS0 3 -II (P2/C, Z=8), and CdS0 3 -III (R3, Z=18 for the hexagonal cell) have been determined by means of single crystal X-ray diffraction data. The final R for the 1475, 2349, and 2138 observed reflections are 0.040, 0.034, and 0.073. Coordination of Cd is trigonal-prismatic, a hitherto unknown coordination of Cd in salts of oxoacids, in CdS0 3 -I and CdS0 3 -II, and octahedral in CdS0 3 -III. The Cd0 6 -polyhedra are arranged in two-dimensional (CdS0 3 -I) and three-dimensional (CdS0 3 -II and CdS0 3 -III) networks. S0 3 2-groups act as monodentate and in CdS0 3 -I and CdS0 3 -II also as bidentate ligands. Cd—O distances range from 224.5(3) to 244.6(3) pm, with an average of 231.5 pm for the trigonal-prismatic and of 231.0 pm for the octahedral coordination. S—O dis-tances range from 152.3(3) to 155.3(3) pm with an average of 153.7 pm, the O —S—O angles from 99.2(2) to 106.7(3)° with an average of 103.2°.
	Reference	(Z. Naturforsch. 42b, 37—41 [1987]; eingegangen am 2. Juli/16. September 1986)
	Published	1987
	Keywords	Cadmium Sulfites, Crystal Structure, Sulfites
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/42/ZNB-1987-42b-0037.pdf
	Identifier	ZNB-1987-42b-0037
	Volume	42

5	Author	Robert Becker, Wolfgang Brockner, Brigitte Eisenmann	Requires cookie*
	Title	Kristallstruktur und Schwingungsspektrum des Thallium(I)-Zinn(II)-ortho-Thiophosphates TlSnPS4
	Abstract	TlSnPS4 crystallizes in the orthorhombic system, space group P na21 (Nr. 33), Z = 4 with the lattice constants a = 1175.8 (5) pm, b = 890.1 (4) pm, c = 663.3 (4) pm. In the structure are sligthly distorted discrete PS4_ anions. The far infrared, infrared and Raman spectrum is assigned on the basis o f P S]-units with C 3v symmetry. According to the DTA data the m elting point for TlSnPS4 is 575 ± 5 °C. The title compound is not moisture sensitive and semi-conducting.
	Reference	Z. Naturforsch. 42a, 1309—1312 (1987); received Septem ber 15 1987
	Published	1987
	Keywords	ortho-Thiophosphate, TlSnPS4, Crystal Structure, Vibration Spectrum
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_A/42/ZNA-1987-42a-1309.pdf
	Identifier	ZNA-1987-42a-1309
	Volume	42

6	Author	Vicente Fernández, Moisés Morán, JuanCarlos Doadrio, Elke Conradi, Wolfgang Willing, Ulrich Müller	Requires cookie*
	Title	EPR-Spektren von Tetrachlorocupraten verschiedener Aminothiazoliumderivate. Die Kristallstrukturen von 2-Amino-2-thiazolinium-und 2-Amino-4-methylthiazoliumtetrachlorocuprat(II) EPR Spectra of Tetrachlorocuprates of Several Aminothiazolium Derivatives. The Crystal Structures of 2-Amino-2-thiazolinium and 2-Amino-4-methylthiazolium Tetrachlorocuprate(II)
	Abstract	The tetrachlorocuprates. of the 2-aminothiazolium ion and of four of its substitution products, of 2-aminothiazolinium, and of 2-amino-4-carboxyl-thiazolidinium ions were prepared from the cor-responding heterocyclic bases, hydrochloric acid and copper(II) chloride in ethanol. The thermo-chromic compounds were characterized by their IR and electronic spectra. The EPR spectra of solutions, frozen solutions, and of the solids show the CUC14 2 ~ ion to have the structure of a flattened tetrahedron; in the case of some of the solids, distortions from D 2 d symmetry are observed. This was confirmed by two X-ray crystal structure determinations. Crystal data: 2-amino-2-thiazolinium tetrachlorocuprate, monoclinic, space group C2/c, a = 2772.8, b = 780.0, c = 1560.0 pm, ß = 112.04°, Z = 8 (R = 0.047 for 2527 observed, independent reflexions); 2-amino-4-methylthiazolium tetrachlorocuprate, triclinic. PI, a = 780.4, b = 853.4, c — 1381.4 pm, a = 103.50, ß = 99.39, y = 104.17°, Z = 2 (R = 0.041 for 3319 reflexions). In both compounds the flattened CuCl 4 2 " tetrahedron is distorted and has two bond angles in the range between 130 and 141°. The heterocyclic cations are protonated at their ring N atoms; the corresponding H atoms and the H atoms of the amino groups are involved in N — H--C1 hydrogen bonding.
	Reference	(Z. Naturforsch. 42b, 15—22 [1987]; eingegangen am 31. Juli 1986)
	Published	1987
	Keywords	Aminothiazolium Derivates, Tetrachloro Cuprates, EPR Spectra, Crystal Structure
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/42/ZNB-1987-42b-0015.pdf
	Identifier	ZNB-1987-42b-0015
	Volume	42

7	Author	Ernst Egert, Ursula Kliebisch, Uwe Klingebiel, Dieter Schmidt	Requires cookie*
	Title	Cyclodi-und -trisilazane — Synthese, Reaktionen und Ringkopplungen Cyclodi-and -trisilazanes — Synthesis, Reactions and Ring Coupling
	Abstract	Contrary to our expectations, a cyclotrisilazane is obtained instead of a cyclodisilazane by the reaction of the lithiated di-rerf-butyldiamino-silane with Hal 2 SiMe 2 . Mono-and disubstitution takes place in reactions of lithiated tetra-isopropyl cyclodisilazane with halogeno-silanes and -boranes. A disubstituted ring reacts with LiOC 4 H 9 -formed from LiC 4 H y and THF — to give an unsymmetrically substituted four-membered ring as proved by a crystal structure determination. Coupling of four-and six-membered rings occurs in the reaction of SiF-substituted and lithiated rings.
	Reference	(Z. Naturforsch. 42b, 23—30 [1987]; eingegangen am 1. September 1986)
	Published	1987
	Keywords	Cyclosilazanes, Substitution, Ring Coupling, Crystal Structure
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/42/ZNB-1987-42b-0023.pdf
	Identifier	ZNB-1987-42b-0023
	Volume	42

8	Author	KurtO. Klepp	Requires cookie*
	Title	Darstellung und Kristallstruktur von NaCu 3 Te 2 Preparation and Crystal Structure of NaCu 3 Te 2
	Abstract	The title compound was prepared by reacting a corresponding mixture of Na 2 Te 2 , copper and tellurium at 700 °C. NaCu 3 Te 2 forms crystals of metallic lustre which are rapidly decomposed in humid atmosphere. It crystallizes with a rhombohedral structure, space group R3m, with a — 4.276(3) Ä, c = 23.78(1) Ä. Z = 3. The crystal structure was determined from diffractometer data and refined to a conventional R of 0.050 for 135 independent reflections. The atomic arrangement of NaCu 3 Te 2 is based on a c.c.p. array of tellurium atoms with stacking sequence c 6 . Na and Cu occupy alternatingly the interstitial layers. Na is in an octahedral coordi-nation (d Na _ Te : 3.22 A), the Cu atoms occupy the tetrahedral and the octahedral voids. They are, however, shifted from the centers of these sites, resulting in an 1 + 3 coordination (d Cu _ Te : 2.70 Ä) for Cu on the tetrahedral. and an essentially trigonal coordination (d Cu Xe : 2.575 A) for Cu on the octahedral sites. NaCu 3 Te 2 shows no closer structural relationships to the other alkali-copper-chalcogenides known so far. However, its crystal structure may be interpreted as an ordered defect derivative structure of the CaCu 4 P 2 -type [1].
	Reference	(Z. Naturforsch. 42b, 130—134 [1987]; eingegangen am 11. April 1986)
	Published	1987
	Keywords	Ternary Chalcogenides, Sodium Copper Telluride, Crystal Structure, Preparation
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/42/ZNB-1987-42b-0130.pdf
	Identifier	ZNB-1987-42b-0130
	Volume	42

9	Author	Dieter Kissel, Rudolf Hoppe	Requires cookie*
	Title	Zur Kenntnis von KCrF 4 [1], [2] On KCrF 4 [1], [2]
	Abstract	KCrF 4 has been prepared as yellowish-green single crystals (by heating of KF, CuF 2 , CrF 3 ; Au-tube, 750 °C, 60 d). It crystallizes in the orthorhombic crystal system (Pnma) with: a = 1573.2, b = 743.2, c = 1833.1 pm, Z = 24. The structure shows [Cr 3 F 9 F 6/2 ] 3 ~-columns along [010], The Madelung Part of Lattice Energie, MAPLE, is calculated and discussed, along with Effec-tive Coordination Numbers, ECoN (via Mean Fictive Ionic Radii, MEFIR). The structure is described using SCHLEGEL-diagrams.
	Reference	Z. Naturforsch. 42b, 135—141 (1987); eingegangen am 12. September 1986
	Published	1987
	Keywords	Preparation, Crystal Structure, MAPLE, SCHLEGEL-Diagrams
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/42/ZNB-1987-42b-0135.pdf
	Identifier	ZNB-1987-42b-0135
	Volume	42

10	Author	Wolfgang Hönle, Bernhard Hettich, Arndt Simon	Requires cookie*
	Title	Preparation and Crystal Structure of LiGaCLj and LiGaI 4
	Abstract	The crystal structures of LiGaCl 4 and LiGaI 4 have been determined by single crystal X-ray methods. Both compounds are isotypic with LiAlCl 4 and characterized by LiX 6 octahedra and GaX 4 tetra-hedra. Mean bond lengths are: d(Ga-X) = 217.4 pm (Cl) and 255.9 pm (I); d(Li-X) = 263.9 pm (Cl) and 305.3 pm (I), respec-tively. Common features of the isotypic compounds LiGaX 4 (X -Cl, Br. I) are discussed.
	Reference	Z. Naturforsch. 42b, 248—250 (1987); eingegangen am 17. Oktober 1986
	Published	1987
	Keywords	Crystal Structure, X-Ray, Lithium Compounds
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/42/ZNB-1987-42b-0248_n.pdf
	Identifier	ZNB-1987-42b-0248_n
	Volume	42

11	Author	H. P. Beck	Requires cookie*
	Title	Die Kristallstruktur des "Indium-Dibromids" (In I In ,I Br 4 ) The Crystal Structure of "Indium Dibromide" (In'ln ni Br 4 )
	Abstract	The crystal structure of In'ln III Br 4 (Indium-Di-bromide) has been determined by single crystal methods. The compound crystallizes with a GaCl 2 -type arrangement in the orthorhombic space group Pnna with the lattice constants: a = 797.6(2) pm, b = 1036.6(2) pm, c -1038.8(2) pm.
	Reference	Z. Naturforsch. 42b, 251—252 (1987); eingegangen am 26. September/17. November 1986
	Published	1987
	Keywords	Crystal Structure, Single Crystal Investigation, Indium Halides
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/42/ZNB-1987-42b-0251_n.pdf
	Identifier	ZNB-1987-42b-0251_n
	Volume	42

12	Author	Sigurd Elz, Martin Dräger, Walter Schunack	Requires cookie*
	Title	Synthese und absolute Konfiguration kettenverzweigter, Cimetidin-analoger Thioether Synthesis and Absolute Configuration of Chain Branched Cimetidine Analogous Thioethers
	Abstract	Chain branched Cimetidine analogous thioethers. promising building blocks for the preparation of H : -histaminergic compounds, were svnthetized from chiral aminoalkanethiols. Enantiomeri-callv pure amino acids or aminoalcohols were used as starting materials. In one case, a resolution via neutral and acid di-0-(4-toluoyl)tartrates was achieved in good yields and satisfying enan-tiomeric excess. The absolute configuration of an ethyl branched compound was determined using X-ray diffraction and anomalous dispersion.
	Reference	Z. Naturforsch. 42b, 348—354 (1987); eingegangen am 22. September 1986
	Published	1987
	Keywords	Aminoalkanethiols, Cimetidine, Crystal Structure, Histamine H : -Receptor Impromidine
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/42/ZNB-1987-42b-0348.pdf
	Identifier	ZNB-1987-42b-0348
	Volume	42

13	Author	Guido Wenski, Albrecht Mewis	Requires cookie*
	Title	Ternäre Varianten des Pyrit-Typs: Darstellung und Struktur von SrPt 4 P 6 , SrPt 4 As 6 , BaPt 4 As 6 und BaPt 2 P 3 Ternary Pyrite-Type Derivatives: Preparation and Crystal Structure of SrPt 4 P 6 , SrPt 4 As 6 , BaPt 4 As 6 and BaPt 2 P 3
	Abstract	The isotypic compounds SrPt 4 P 6 , SrPt 4 As 6 and BaPt 4 As 6 were found to crystallize with a Pyrite-type derivative structure (monoclinic, C2/c, Z = 4) in which one Sr or Ba atom per formula unit occupies the position of a P 2 or As 2 pair. BaPt 2 P 3 forms another Pyrite-type related structure (monoclinic, I > 2 1 /c, Z = 4) built up by Ba 2 Pt and Pt 3 P 6 layers. All crystal structures were refined from four-circle diffractometer data, the lattice constants are:
	Reference	Z. Naturforsch. 42b, 507—513 (1987); eingegangen am 28. Oktober 1986
	Published	1987
	Keywords	Ternary Pyrite-Type Derivatives, Platinum, Crystal Structure
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/42/ZNB-1987-42b-0507.pdf
	Identifier	ZNB-1987-42b-0507
	Volume	42

14	Author	Michael Witt, HerbertW. Roesky, Mathias Noltemeyer, GeorgeM. Sheldrick	Requires cookie*
	Title	Synthese und Struktur von H 2 NS0 2 NWC1 4 - ein Kirsanov-Reagens mit einem Übergangsmetallatom Synthesis and Structure of H 2 NS0 2 NWC1 4 - a Kirsanov Reagent with a Transition Metal Atom
	Abstract	H 2 N-S0 2 -NWC1 4 (1) has been synthesized from WC1 6 and S0 2 (NH 2) 2 , and forms adducts with donor solvents such as pyridine and acetonitrile. 1CH 3 CN crystallizes in the space group P2,/n with cell constants a = 652.5(1); b = 2325.3(2); c = 775.8(1) pm; ß = 90.32(1)°. The nitrogen-tungsten bond length of 173.0 pm and the S—N—W bond angle of 169.3° indicate a W=N double bond.
	Reference	Z. Naturforsch. 42b, 519—521 (1987); eingegangen am 1. Dezember 1986/20. Januar 1987
	Published	1987
	Keywords	Crystal Structure, Sulfamide, Nitrogen-Tungsten Double Bond
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/42/ZNB-1987-42b-0519.pdf
	Identifier	ZNB-1987-42b-0519
	Volume	42

15	Author	PeterG. Jones, Ralf Schelbach, Einhard Schwarzmann	Requires cookie*
	Title	Hydroxy Complexes of Gold 2. Calcium Aurates [1]
	Abstract	Two calcium aurate phases have been obtained as single crystals, phase 1 from H AUC1 4 + Ca(OH) 2 and phase 2 from NaAu(OH) 4 + Ca(C10 4) 2 . An X-ray structure determination of 1 shows its composition to be Ca 2 (0H) 3 (H 2 0) 4 [Au(0H) 4 ]. The apparent space group is Cmcm, but this corresponds to a sub-cell of the true structure. The disordered Cmcm structure was refined to R 0.032 for 813 reflections. The coordination geometry is square planar at gold (Au-O 1.97, 1.99 Ä), cubic at Ca(l) and octahedral at Ca(2). Phase 2 crystallizes in a primitive tetragonal cell with a 6.94, c 7.71 Ä; it is probably Ca[Au(OH) 4 ] 2 , but this has not yet been confirmed by a full structure determination.
	Reference	Z. Naturforsch. 42b, 522—524 (1987); received December 2 1986
	Published	1987
	Keywords	Gold(III), Hydroxide, Calcium, Crystal Structure
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/42/ZNB-1987-42b-0522.pdf
	Identifier	ZNB-1987-42b-0522
	Volume	42

16	Author	Wolfgang Hönle, Arndt Simon, Gabriele Gerlach	Requires cookie*
	Title	Darstellung, Kristallstruktur und Eigenschaften von ß-Ga 2 Br 4 Preparation, Crystal Structure and Properties of y3-Ga 2 Br 4
	Abstract	The compounds Ga 2 Br 4 (a+ß) have been prepared by reacting GaBr 3 with Ga metal without a solvent or in a hydrocarbon medium. a-Ga 2 Br 4 is isotypic with Ga 2 Cl 4 , and /3-Ga 2 Br 4 with Ga 2 I 4 . Both forms have to be formulated as Ga + (GaBr 4)~ according to their crystal structures. The first order phase transition a—*ß has been investigated by means of DTA and temperature dependent X-ray powder photographs. The crystal structure of /3-Ga 2 Br 4 has been refined with single crystal data (R3c; a = 2163.4(8) pm; c = 869.2(4) pm; Z = 18; R = 0.037). Main building units are GaBr 4 " tetrahedra (d(Ga —Br) = 232.9 pm), connected in three dimensions by capped trigonal prisms (6+2+1) around Ga + . The crystal chemical relationships between y3-Ga 2 Br 4 and Ga 2 I 4 are discussed.
	Reference	Z. Naturforsch. 42b, 546 (1987); eingegangen am 13. November 1986
	Published	1987
	Keywords	Phase Transition, DTA Investigation, Crystal Structure
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/42/ZNB-1987-42b-0546.pdf
	Identifier	ZNB-1987-42b-0546
	Volume	42

17	Author	Reinhard Nesper, Jan Curda	Requires cookie*
	Title	das erste Chalcogenid mit zweiwertigem Aluminium Al 7 Te 10 — the First Chalcogenide of Divalent Aluminum
	Abstract	Al 7 Te 10 is prepared from a melt of the elements in stoichiometric amounts in a corundum crucible contained in a sealed quartz ampoule. The ruby red cube shaped crystals are stable below 840 K. The structure of Al 7 Te, 0 (R32-D^; a = 1439.5 pm, c = 1793.2 pm, Z = 6, R = 0.03) is a distorted defect variant of a tetrahedral arrangement of the 4H-polytype. The central unit, a double barrelane [Te 4 Al 4 —Al 4 Te 4 ], contains an Al —Al bond of 260 pm, which is somewhat longer (n = 0.83) than an expected single bond (250 pm, n = 1). This homopolar bond disturbs the electrostatically favorable (Al—Te—)" sequence in the structure which is compensated by the occurrence of four-membered Al 2 Te 2 rings. Al 7 Te 10 is a Zintl phase according to l/2{[Al 2+ -Al 2+ ][Al 3+ ] !2 [Te 2 ~] 20 } and exhibits semiconducting and diamagnetic behaviour.
	Reference	Z. Naturforsch. 42b, 557 (1987); eingegangen am 9. Dezember 1986
	Published	1987
	Keywords	Synthesis, Crystal Structure, Divalent Aluminum, Aluminum-Aluminum Bonds
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/42/ZNB-1987-42b-0557.pdf
	Identifier	ZNB-1987-42b-0557
	Volume	42

18	Author	Sigurd Elz, Martin Dräger, Hans-Joachim Sattler, Walter Schunack	Requires cookie*
	Title	Synthese und Absolute Konfiguration von (+)-l-Amino-2-propanthiol-HCl Synthesis and Absolute Configuration of ( + )-l-Amino-2-propanethiol * HCl
	Reference	Z. Naturforsch. 42b, 617—622 (1987); eingegangen am 22. August 1986
	Published	1987
	Keywords	Amino-2-propanethiol, Crystal Structure, Diastereomers, Impromidine, Thiazolidines
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/42/ZNB-1987-42b-0617.pdf
	Identifier	ZNB-1987-42b-0617
	Volume	42

19	Author	K. Brodersen, H. Procher, Hans-U Hummel	Requires cookie*
	Title	Synthesis and Crystal Structure of PbZn(NCS) 4
	Abstract	PbZn(NCS) 4 is obtained from the binary compounds Pb(SCN) 2 and Zn(NCS) 2 with traces of water in an ultra-sound bath. The space group of the complex is Pn2[a (standard: Pna2,) with Z = 4. The structure consists of as-connected octahedra ^.[PbS 2 S 4/2 ] forming two-dimensional layers. All SCN-groups are bound to Zn 2+ via their N atoms. The resulting ZnN 4 tetrahedra are arranged in the cavities formed by the PbS 6 octahedra.
	Reference	Z. Naturforsch. 42b, 679—681 (1987); eingegangen am 6. November 1986/27. Januar 1987
	Published	1987
	Keywords	Lead(II) Tetraisothiocyanatozincate, Synthesis, Crystal Structure
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/42/ZNB-1987-42b-0679.pdf
	Identifier	ZNB-1987-42b-0679
	Volume	42

20	Author	R. Minkwitz, H. Prenzel, H. Pritzkow	Requires cookie*
	Title	Beiträge zur Chemie der Schwefel-Halogenide, 17 [1] Dimethyl(methylthio)-und Dimethyl(phenylthio)sulfonium-Salze Contributions to the Chemistry of Sulfur Halides, 17 [1] Dimethyl(methylthio)-and Dimethyl(phenylthio)sulfonium Salts
	Abstract	IR, Raman and NMR spectroscopic studies of dimethyl(methylthio)-and dimethyl(phenyl-thio)sulfonium salts (CH 3) 2 SSR + A~ (R -CH 3 , C 6 H 5 ; A = AsF 6 ~, SbCl 6 ~) are reported. The crystal structure of (CH 3) 2 SSCH 3 + AsF 6 ~ shows for the cation a conformation different from that reported for the hexachloroantimonate.
	Reference	Z. Naturforsch. 42b, 750—755 (1987); eingegangen am 5. Dezember 1986/4. Februar 1987
	Published	1987
	Keywords	Thiosulfonium Salts, NMR Spectra, Crystal Structure
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/42/ZNB-1987-42b-0750.pdf
	Identifier	ZNB-1987-42b-0750
	Volume	42

1