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1Author    Mit Unterschiedlich, Koordinierten Zinkionen, Joachim Pickardt, Gill-Taik Gong, Sabine Wischnack, Christina SteinkopffRequires cookie*
 Title    Kristallstruktur zweier Zinkthiocyanat-Hexamethylentetramin-Addukte, Zn(SCN)2» (Q H ^N,), und {Zn(SCN)2 C6HnN4 2H 20}(SCN)2-(C6H 12N4)2, and {Zn(SCN)2-C6H 12N4-2H 20}", with Differently Coordinated Zinc Ions  
 Abstract    of the adducts Zn(SCN),-(C6H12N4)2 (1), and {Zn(SCN)2-C6H 12N4-2H20}" (2) were obtained by crystallization from aqueous solutions containing hexamethylenetetrami­ ne, potassium thiocyanate and zinc nitrate or zinc sulfate, resp., under identical conditions, as two totally different products. 1 crystallizes orthorhombically, space group P nmm, Z -2, a -622.4(5), b -1152.3(7), c = 1394.0(9) pm; 2 is monoclinic, space group C2/c, a = 984.4(3), b = 1217.0(5), c = 1257.4(6) pm, andß = 111.69(5)°. The crystal structure of 1 contains discrete molecules of the complex, in which the zinc ion is tetrahedrally coordinated by two NCS li­ gands, and two hexamethylenetetramine molecules, which act as monodentate ligands. In 2 however, the zinc ions are octahedrally coordinated. A "supramolecular" structure is form­ ed: The hexamethylenetetramine molecules act as bridging bidentate ligands and connect [Zn(H20) 2(NCS)2] units forming zig-zag chains. Adjacent chains are interconnected via hydrogen bonds. The formation of the two compounds with different coordination may be due to the fact, that the educts Zn(N03)2-4H20 and ZnS04-7H20 contain Zn(H20) 4 and Zn(H20) 6 moieties, resp., and that these species are retained in solution. 
  Reference    Z. Naturforsch. 49b, 325—329 (1994); eingegangen am 24. August 1993 
  Published    1994 
  Keywords    Hexamethylenetetramine Complexes, Zinc Thiocyanate Adducts, Crystal Structure Crystals 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0325.pdf 
 Identifier    ZNB-1994-49b-0325 
 Volume    49 
2Author    Srb^sioogThomas Berger, Klaus-Jürgen RangeRequires cookie*
 Title    Hochdrucksynthese und Strukturverfeinerung von Strontium-Danburit, SrB2Si20 8 High-Pressure Synthesis and Structure Refinement of Strontium Danburite  
 Abstract    of strontium danburite, SrB2Si20 8, were found after high-pressure treatment of SrSi03/Si02/Al20 3 mixtures at 40 kbar and 1400°C, obviously formed by an unwanted side reaction with the boron oxide-containing boron nitride capsules used. The crystals are orthorhombic, space group Pnma, with a = 8.1891 (5), b = 7.9311 (6), c = 8.9284(5) A and Z = 4. The structure was refined to R = 0.031, Rw = 0.028 for 590 independent, absorption-corrected reflections. SrB2Si20 8 is isostructural with danburite (CaB2Si20 8). The structure comprises a tetrahedral framework of ordered B20 7 and Si2Ov groups which contains Sr in irregular coordination. Die Kristallstruktur des seit 1839 bekannten Dan-burits, CaB2Si20 8, wurde 1931 von Dunbar und Machatschki [1] bestimmt und später von Johann-son [2], Bakakin, Kravchenko und Belov [3] sowie von Phillips, Gibbs und Ribbe [4] verfeinert. Ob­ wohl Dunbar und Machatschki die Positionen der Boratome nur ungenau festlegen konnten, haben sie das Grundprinzip der Danburitstruktur korrekt be­ schrieben; es liegt ein dreidimensionales Netzwerk aus geordnet verteilten, eckenverknüpften B20 7-und Si20 7-Gruppen vor, das die Ca-Atome in irre­ gulärer Koordination durch Sauerstoff enthält. Eine 1'B-NMR-Studie von Brun und Ghose [5] belegt, daß die geordnete B-Si-Verteilung in Danburit bis zu dessen Zersetzungstemperatur erhalten bleibt. Während also CaB2Si2Ö 8 strukturell gut charak­ terisiert ist, lagen von der homologen Verbindung SrB2Si20 8 bisher nur Pulverdaten vor. SrB->Sio08 wurde erstmals von Verstegen et al. erwähnt, die die Lumineszenz der Eu-aktivierten Verbindung un­ tersuchten [6]. Auf sie geht auch die Bestimmung der Zellparameter zurück. Aufgrund der vermute­ ten Ähnlichkeit zum Danburit schlugen Verstegen et al. [6] für SrB2Si2Og den Namen Strontium-Dan-burit vor. Eine weitere Erwähnung der Verbindung SrB2Si20 8 erfolgt bei Baylor und Brown [7], die Phasengleichgewichte im ternären System SiCX-B20 3-Sr0 untersuchten. * Sonderdruckanforderungen an Prof. Dr. K.-J. Range. 
  Reference    Z. Naturforsch. 51b, 172—174 (1996); eingegangen am 20. Juli 1995 
  Published    1996 
  Keywords    Stontium Danburite, High-Pressure Synthesis, Crystal Structure Single crystals 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0172.pdf 
 Identifier    ZNB-1996-51b-0172 
 Volume    51 
3Author    H. Jacobs, E.Von OstenRequires cookie*
 Title    The Crystal Structure of a New Modification of Potassium Amide, KNH2  
 Abstract    In the temperature range from 54 to 75 °C a new modification of KNH2 was found, which crystallizes tetragonally a — 4.282 ±0.003 A, c = 6.182 ±0.003 A, and c/o= 1.444 (60 °C), in P 4/nmm -No. 129-, Z = 2, 2 K in 2c 0 1/2 z, z = 0.202(5), 2 N in 2c 0 1/2 z, z = 0.737(15). Its structure is of a deformed sodium chloride type. 
  Reference    (Z. Naturforsch. 31b, 385—386 [1976]; eingegangen am 24. November 1975) 
  Published    1976 
  Keywords    Potassium-Compound, Crystal Structures, Amides 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0385_n.pdf 
 Identifier    ZNB-1976-31b-0385_n 
 Volume    31 
4Author    Klaus Deller, Brigitte EisenmannRequires cookie*
 Title    The Crystal Structure of SrAs3  
 Abstract    The new intermetallic compound S1A.S3 crystallizes monoclinic, space group C2/m [a = 9.61(1) A, b = 7.63(1) A, c = 5.88(1) A, ß — 112.9(1)°). The anionic part of the struc-ture contains puckered layers of two-and threebonded As-atoms. 
  Reference    (Z. Naturforsch. 31b, 1550—1551 [1976]; eingegangen am 6. September 1976) 
  Published    1976 
  Keywords    Intermetallic Compounds, Arsenide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-1550_n.pdf 
 Identifier    ZNB-1976-31b-1550_n 
 Volume    31 
5Author    EdwardW. Abel, StuartA. Mucklejohn, T.Stanley Cameron, RuthE. CordesRequires cookie*
 Title    The Dimeric Phosphinimine Complex [CdI2(HN: PPh3)2]2 Containing N-H --I Hydrogen Bonds  
  Reference    Z. Naturforsch. 33b, 339—340 (1978); received December 5 1977 
  Published    1978 
  Keywords    X-ray, Crystal Structure, Phosphinimine 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0339_n.pdf 
 Identifier    ZNB-1978-33b-0339_n 
 Volume    33 
6Author    Hans-Georg Von Schnering, Wolfgang MayRequires cookie*
 Title    Die Struktur des 2  
 Abstract    One of the diastereomeres of 2,3,4,6,7,8-hexamethyl-2,3,4,6,7,8-hexaphosphabicyclo-[3,3,0]octane (PMe)öC2H2 crystallizes in the space group P2i/n with four molecules per unit cell. Two independent molecules are nearly identical in shape but differ by inter-molecular packing. The five-membered rings have a skew chair conformation with all exocyclic methyl groups in axial positions leading to a staggered all-trans conformation of the bicyclic system. The mean bond lengths are P-P = 220.9 pm, P-C = 185.9 pm and C-C = 151.9 pm. 
  Reference    Z. Naturforsch. 33b, 698—698 (1978); eingegangen am 24. April 1978 
  Published    1978 
  Keywords    Carbaphosphane, Molecular Structure, Crystal Structure 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0698.pdf 
 Identifier    ZNB-1978-33b-0698 
 Volume    33 
7Author    Alain Schiff-Frangois, Gerhard Savelsberg, Herbert SchäferRequires cookie*
 Title    Darstellung und Struktur von  
 Abstract    Three sulfurapatites have been prepared. They crystallize in the hexagonal system (P63/m) with the following lattice constants: BaS(As04)2S04: a= 1052.6(5) pm, c= 773.7(4) pm, c/a = 0,735; SrS(As04)2S04: a = 1016.1(8) pm, c= 741(1) pm, c/a = 0.729; SrS(P04)2S04: a = 980.3(8) pm, c= 727(1) pm, c/a = 0.742. 
  Reference    Z. Naturforsch. 34b, 764—765 (1979); eingegangen am 16. Februar 1979 
  Published    1979 
  Keywords    Sulfur Apatite, Preparation, Crystal Structure 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0764_n.pdf 
 Identifier    ZNB-1979-34b-0764_n 
 Volume    34 
8Author    M. Schweizer, Hk Müller-BuschbaumRequires cookie*
 Title    Zur Kenntnis einer neuen ternären Phase Cu0)5Nbli5O3>7  
 Abstract    Single crystals of Cuo,5Nbi,503.7 were prepared and investigated by X-ray methods (a = 376.7, b = 507.3, c = 374,9 pm; ß = 101.5°; space group: P2i-Cg). The statistically occupied metal positions (Nb/Cu) have a trigonal prismatic O 2-surrounding. 
  Reference    Z. Naturforsch. 34b, 774—776 (1979); eingegangen am 7. März 1979 
  Published    1979 
  Keywords    Niobium, Oxygen, Crystal Structure 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0774.pdf 
 Identifier    ZNB-1979-34b-0774 
 Volume    34 
9Author    J. Schmachtel, Hk, Müller-BuschbaumRequires cookie*
 Title    Oxotitanate mit gemischter Valenz, II Zur Kenntnis von Sr2Ti6013 Oxotitanates with Mixed Valence, II About Sr2Ti60i3  
 Abstract    Single crystals of Sr2TieOi3 were prepared by heating a mixture of SrO • Ti203 • 2 TiOo in a vacuum furnace to 1800 °C for 6 hours. X-ray investigations show monoclinic sym-metry (a = 1525,0, b = 376,9, c = 916,4 pm; ß = 99,15°, space group Cgh-C2/m). Sr2Ti60i3 is isotypic with Ba2Ti60i3. 
  Reference    (Z. Naturforsch. 35b, 4—6 [1980]; eingegangen am 9. Oktober 1979) 
  Published    1980 
  Keywords    Strontium, Titanium, Oxygen, Crystal Structure 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0004.pdf 
 Identifier    ZNB-1980-35b-0004 
 Volume    35 
10Author    Klaus Volk, Gerhard Cordier, Ralph Cook, Herbert SchäferRequires cookie*
 Title    BaSbTe3 und BaBiSe3 Verbindungen mit BiSe-bzw. SbTe-Schichtverbänden BaSbTe3 and BaBiSe3 Compounds with BiSe-or SbTe-Layer Structures, Respectively  
 Abstract    The new compounds BaBiSe3 and BaSbTe3 crystallize in the orthorhombic system, space group P2i2i2i with BaBiSe3: a = 1724 ± 2 pm, b = 1600 ± 2 pm, c = 437.0 ± 0.5 pm; BaSbTe3: a = 1809 ± 2 pm, b = 1694 ± 2 pm, c = 463.5 ± 0.4 pm. BiSeö-or SbTe6-octahedra, resp., are connected by common edges to fourfold strings. These are bound by additional chalcogen atoms to sheets, between which the Ba ions are located. 
  Reference    Z. Naturforsch. 35b, 136—140 (1980); eingegangen am 16. Oktober 1979 
  Published    1980 
  Keywords    Bariumbismutselenide, Bariumantimonytelluride, Crystal Structure 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0136.pdf 
 Identifier    ZNB-1980-35b-0136 
 Volume    35 
11Author    U. Lehmann, Hk Müller-BuschbaumRequires cookie*
 Title    The Structure of Nd2Ni04 and its Relationship to La2Ni04 and La2CuC>4  
 Abstract    Single crystals of Nd2Ni04 were prepared by plasma and C02-LASER technique and analysed by X-ray single crystal methods. Nd2Ni04 is the first compound of the orthorhombically dis-torted La2Cu04-type. 
  Reference    Z. Naturforsch. 35b, 389—390 (1980); eingegangen am 19. Dezember 1979 
  Published    1980 
  Keywords    Neodymium, Nickel, Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0389_n.pdf 
 Identifier    ZNB-1980-35b-0389_n 
 Volume    35 
12Author    A.-R Schulze, U. Hk, Müller-BuschbaumRequires cookie*
 Title    Oxogallates of Alkaline Earth Metals, IX The Structure of ß-SrGa204  
 Abstract    /?-SrGa204 was prepared and investigated by X-ray single crystal methods. It crystallizes with monoclinic symmetry: C2j>-P2i/c, a — 839.2; b = 901.8; c = 1069.7 pm; ß = 93.9°, Z — 8. The orientation of the tetrahedra is discussed in comparison with other well-known members of the stuffed tridymite structure. 
  Reference    Z. Naturforsch. 36b, 892—893 (1981); eingegangen am 27. März 1981 
  Published    1981 
  Keywords    Crystal Structure, Strontium, Gallium, Oxide 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0892_n.pdf 
 Identifier    ZNB-1981-36b-0892_n 
 Volume    36 
13Author    Birgit Lehnis, Joachim SträhleRequires cookie*
 Title    Synthese und Kristallstruktur von C83(AuBr 4 ) 2 Br3 Synthesis and Crystal Structure of Cs3(AuBr4) 2 Br 3  
 Abstract    Cs3(AuBr4)2Br3 is obtained in the form of red needles by adding the stoichiometric amount of CsBr to a solution of HAuBr4 and Br3~ in aqueous HBr. The salt decomposes slowly at room temperature to form a mixed-valent, cubic bromo aurate(I,III), in which the linear AuBr 2 ~ ions are partially substituted by Br3~ ions. At 140 °C Cs 2 Au 2 Bre and CsBr are formed. Cs3(AuBr4) 2 Br3 crystallizes monoclinic with four formula units in the space group P2i/c. The structure is built up by AuBr 4 ~ and Br3~ anions and Cs+ cations. An average Au-Br distance of 242.2 pm was found for the square planar AuBr 4 ~ ion. The linear Br3~ groups are almost symmetrical with Br-Br distances of 254.0 and 256.2 pm. Therefore only two vibrations are observed in the IR spectrum: Vas = 172, <5 = 56 cm -1 . The absorptions of the AuBr 4 _ groups are: vas = 250, <5as= 113, y — 102 cm -1 . 
  Reference    Z. Naturforsch. 36b, 1504—1508 (1981); eingegangen am 8. September 1981 
  Published    1981 
  Keywords    Synthesis, IR Spectra, Crystal Structure 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1504.pdf 
 Identifier    ZNB-1981-36b-1504 
 Volume    36 
14Author    K. B. Plötz, Hk Müller-BuschbaumRequires cookie*
 Title    Oxoplumbate(II), IV Einbau von Sr 2+ in Pb9Al8021 Solid State Chemistry of Oxoplumbates(II), IV Incorporation of Sr 2+ in Pb9Al802i  
  Reference    (Z. Naturforsch. 37b, 108—109 [1982]; eingegangen am 29. September 1981) 
  Published    1982 
  Keywords    Crystal Structure, Lead, Aluminium, Strontium 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0108_n.pdf 
 Identifier    ZNB-1982-37b-0108_n 
 Volume    37 
15Author    Karl-Friedrich Tebbe, Roland FröhlichRequires cookie*
 Title    Beiträge zur Strukturchemie phosphorhaltiger Ketten und Ringe, V [1]  
 Abstract    Die Molekül-und Kristallstruktur des 1.2.3.4-Tetra-ferf-butyl-1.4-bis(trimethylsilyl)tetraphosphans, Me3Si-(«-BuP)4-SiMe3 Structural Chemistry of Phosphorus-Containing Chains and Rings, V [1] Molecular and Crystal Structure of 1,2,3,4-Tetra-ferf-butyl-1,4-bis(trimethylsilyl)tetraphosphane, (H3C)3Si-(f-BuP)4-Si(CH3)3 The compound l,2,3,4-tetra-£er£-butyl-l,4-bis(trimethylsilyl)tetraphosphane, Me3Si-(£-BuP)4-SiMe3, C22H54P4Si2, crystallizes monoclinically in the space group P2i/n (No. 14) with a = 889.9 pm, b = 2292.8 pm, c = 1568.0 pm, ß = 94.14° and Z = 4 formula units. The molecule forms a twisted Si-P4-Si-chain with two kinds of P-P-bonds. The atoms neighbouring the silicium atoms take part in bonds of length d(P-P) = 218.8 pm, whereas the central bond d(P-P) = 221.4 pm is much longer. A special feature of the structure is a short contact d(P-P) = 345.6 pm. Therefore, the inner region of the molecule has the shape of a nearly planar trapezium of the four phosphorus atoms. The periphery of the molecule is as expected. The average bond lengths are d(P-Si) = 228.5 pm, H(P-C) — 190.2 pm, d(Si-C) = 186.6 pm, d(C-C) = 151.8 pm and d(C-H) = 94 pm. 
  Reference    Z. Naturforsch. 37b, 534—541 (1982); eingegangen am 23. Dezember 1981 
  Published    1982 
  Keywords    Tetraphosphane, Phosphorus Chain, Crystal Structure 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0534.pdf 
 Identifier    ZNB-1982-37b-0534 
 Volume    37 
16Author    M. Pušelj, Z. Ban, A. DrašnerRequires cookie*
 Title    On the Crystal Structure of HgZn3  
 Abstract    The crystal structure of the intermetallic phase HgZn3 was determined using X-ray single crystal and powder diffraction methods. The phase belongs to the orthorhombic system, most probable space group being Cmc2i, and appears to be isostructural with /S'-Cu3Ti. Under standard preparative conditions a statistical distribution of both atomic species was observed. 
  Reference    Z. Naturforsch. 37b, 557—559 (1982); received December 14 1981 
  Published    1982 
  Keywords    Crystal Structure, Zinc, Mercury, Amalgam 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0557.pdf 
 Identifier    ZNB-1982-37b-0557 
 Volume    37 
17Author    Annegret Lipka, Dietrich MootzRequires cookie*
 Title    von Antimontribromid mit Biphenyl, 2 SbBr3 * C12H10 The Crystal Structure of the 2 : 1 Adduct of Antimony Tribromide with Biphenyl, 2SbBr3-Ci2Hio  
 Abstract    The crystal structure of 2 SbBr3 • biphenyl consists of pyramidally shaped SbBr3 molecules and planar biphenyl molecules which form a centrosymmetric complex through bonding of the Sb atoms to the phenyl rings. The distance of the Sb atoms to the phenyl ring planes is 323 pm. Taking into account intramolecular bonds Sb-Br at an average of 250.9 pm, an intermolecular Sb---Br contact at 369.5 pm and the .-r-donor-acceptor inter-action the Sb coordination is distorted -octahedral. The structure is discussed with regard to related compounds. 
  Reference    Z. Naturforsch. 37b, 695—698 (1982) 
  Published    1982 
  Keywords    Crystal Structure, Antimony Trihalides, Biphenyl 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0695.pdf 
 Identifier    ZNB-1982-37b-0695 
 Volume    37 
18Author    Helmut Endres, Nasser Kadkhodai-ElyaderaniRequires cookie*
 Title    Malonenamidoxim, Nickelkomplexe und deren ßeaktionsprodukte mit Sauerstoff und Kohlendioxid: Vergleichende Strukturuntersuchungen Malonenamide Oxime, Nickel Complexes, and their Reaction Products with Oxygen and Carbon Dioxide: Comparative Structural Studies  
 Abstract    Malonenamide oxime [HONC(NH2)CH2C(NH2)NOH = C3H8N402] (1), its bis-chelate complex with Ni(II) [Ni(C3HyN402)2] (2) and an ethanol solvate of this complex [Ni(C3H7N402)2 • 0.6 C2H5OH] (3) are characterized by X-ray structure analysis, as well as a paramagnetic tris-complex [Ni(C3H7N402)2(C3HsN402)] (4), which forms a catena structure in the crystal. The molecular structures of two reaction products of 2 with air are described: [Ni(C3H5N403)2(H20)2] • 4 H20 (5) has formed by oxidation of the methylene groups and may be taken as a complex of mesoxalamide oxime; [NiCsHieNsOs] • 6 H20 (6) has a macrocyclic ligand which is a derivative of orthocarbonic acid, formed by addition of carbon dioxide to the oxime groups. 
  Reference    Z. Naturforsch. 37b, 1255—1265 (1982); eingegangen am 25. Mai 1982 
  Published    1982 
  Keywords    a, y-Diondioxime Complexes, Crystal Structure 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1255.pdf 
 Identifier    ZNB-1982-37b-1255 
 Volume    37 
19Author    Peter Pullmann, Karl Hensen, JanW. BatsRequires cookie*
 Title    Röntgenstrukturbestimmung von A1C13-Pyridin-Addukten: Der strukturelle Aufbau im fra7is-Dichlorotetrakis(pyridin)aluminium(III)- Tetrachloroaluminat(III) und im Trichlorotris(pyridin)aluminium(III) X-ray Diffraction Study of AICI3-Pyridine Adducts: The Crystal Structure of 7ra/?s-Dichlorotetrakis(pyridine)aluminium(III)tetrachloroaluminat(III) and of Trichlorotris(pyridine)aluminium(III)  
 Abstract    Crystals of [A1(C5H5N)4C12][A1C14] are orthorhombic, Pna2lf Z = 4, a = 18.522(7), b = 15.141(5), c = 9.593(3) A, V = 2690(2) A 3 , Dc = 1.440 g/cm 3 . The structure has been solved from 5968 diffractometer measured intensities and refined by full-matrix least squares to RW(F) = 0.032. The crystal structure shows the complex to be £ra»s-dichloro-tetrakis(pyridine)aluminium(III) tetrachloroaluminat(III). The mean trans Al-Cl-and trans Al-N-distances in the octahedron are 2.279(3) and 2.070(4) A, respectively. Crystals of Al(C5H5N)3Cl3 are monoclinic, P2i/c, Z = 4, a = 7.261(2), b = 29.961(4), c = 8.624(1) A, ß = 98.12(2)°, V -1857(1) A 3 , D0 = 1.326 g/cm 3 . The structure has been solved from 4707 diffractometer measured intensities and refined to RW(F) = 0.028. The crystal structure shows octahedral complexes AICI3 • 3 (C5H5N) with trans geometry. The Al-N-distance trans to chlorine (2.096(2) A) is significantly longer than the two other Al-N-distances (mean 2.072(2) A). 
  Reference    Z. Naturforsch. 37b, 1312—1315 (1982); eingegangen am 5. Mai 1982 
  Published    1982 
  Keywords    Aluminium Chloride, Pyridine, Crystal Structure 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1312.pdf 
 Identifier    ZNB-1982-37b-1312 
 Volume    37 
20Author    Bernt Krebs, Andreas Schäffer, Marita HuckeRequires cookie*
 Title    Oxotrihalogenoselenate(IV)  
 Abstract    Darstellung, Struktur und Eigenschaften von P(C6H5)4SeOCl3, P(C6H5)4SeOBr3 und As(C6H5)4SeOBr3 Oxotrihalogenoselenates(IV): Preparation, Structure and Properties of P(C6H5)4SeOCl3, P(C6H5)4SeOBr3 and As(C6H5)4SeOBr3 The novel oxotribromosolenate(IV) SeOBr3~ anion was prepared from the reaction of stoichiometric quantities of SeOBi'2 and bromide in acetonitrile solution, and it was isolated as the tetraphenylphosphonium and -arsonium salts in crystalline form. For the synthesis of the analogous SeOCl3 _ as P(C'6H5)4SeOCl3, SeCl4 was reacted in the presence of a small quantity of H«() with P(CeH5)4Cl in acetonitrile. Complete N-ray structural analyses of P(C6H5)4SeOCi3 (space group P I, a = 10.981(3), b = 11.059(3), c = 10.358(3) A, a = 73.77(2)°, ß = 83.33(2)°, -/ = 80.51(2)°, V -1187.9(6) A 3) and of P(C6H5)4SeOBr3 (space group P 2i/c, a = 11.719(4), b = 16.088(4), c = 13.124(4) A, ß = 94.72(3)°, V = 2466(1) A 3) show dimeric centrosymmetric Se202Cl6 2-and Se202Br6 2 -anions being present in the solid. In the anions two square-pyramidal (y-octahedral) SeOHal4 groups are connected through a common Hal-Hal edge. The axial oxygen ligands (Se-O: 1.597(4) and 1.584(6) A) cause a pronounced stereochemical iraws-activation of the inert pairs at the Se atoms. As(C6H5)4So()Br3 is isotypic with P(C6H5)4SeOCl3. 
  Reference    Z. Naturforsch. 37b, 1410—1417 (1982); eingegangen am 13. Mai 1982 
  Published    1982 
  Keywords    Oxohalogenoselenate, Crystal Structure, Selenium 
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 Identifier    ZNB-1982-37b-1410 
 Volume    37 
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