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1998[X]
1Author    Andre Wiesch3, Hauke Timmb, Karsten Bluhm3Requires cookie*
 Title    Uber CuDy2[B80 16] und CuHo2[B80 16]: Zwei neue "Metaborate" mit einem ^ [B80 16]g_-Anion On CuDy2[B80 16] and CuHo2[B80 16]: Two New "Metaborates" with a ^ [B80 16]8-Anion  
 Abstract    Nearly colourless single crystals of the compounds CuDy2 [B80 i 6] (I) and CuHo2[B80)6] (II) have been obtained by a B20 3 flux technique. They crystallize in the structure of CuTb2 [B80)6] (I) or in an orthorhombic variant (II). X-ray investigations on single crystals led to the space group C2h -P2!/c (Nr. 14) with lattice parameters a = 1025,5(10); b = 836,99(10); c = 621,2(8) pm, ß = 90.47(10)°; Z = 2 (I) and D^h -Pbam (Nr. 55) with a = 840,7(2), b = 616,6(2), c = 1022,0(2) pm, Z = 2 (II). The structures contain 1 [B80 16]8_ chains isolated from each other, which include tri-and tetracoordinated boron, T'fie chains consist of alternating twelve and eight-membered rings of boron and oxygen atoms connected by B 0 4 units. Dy,+ and H o 3+ are octacoordinated and Cu2+ is hexacoordinated in elongated octahedra by oxygen. The relation between these two structures is discussed. 
  Reference    (Z. Naturforsch. 53b, 1—4 [1998]; eingegangen am 23. Oktober 1997) 
  Published    1998 
  Keywords    Copper, Lanthanoids, Borate, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0001.pdf 
 Identifier    ZNB-1998-53b-0001 
 Volume    53 
2Author    Lanthanoid Borates, A. Wiesch, K. BluhmRequires cookie*
 Title    CuHo2[B20 5]2* Ein unerwarteter Strukturtyp in der Reihe der Kupferlanthanoidborate CuHo2[B20 5]2: An Unexpected Structure Type in the Series of Copper  
 Abstract    Single crystals of the new compound CuHo2 [B20 5 ]2 were obtained by using a B20 3 flux technique with CuO and Ho20 3 at 1050 °C. X-ray investigations on single crystals led to the space group P 2,/c (Nr. 14) with lattice parameters a = 454.3(2); b = 726.0(4); c = 936.0(5) pm; ß = 90.77(1)°; Z = 2. The compound is isotypic to CuTb2[B20 5 ] 2 as well as to the gadolinite structure (FeY2 [BeSi05]2). The structure exhibits layer-like 2 [B20 5]4~, a two-dimensional anion consisting of edge sharing B 0 4 -tetrahedra, which form four-and eight-membered rings. The layers are connected by elongated C u06-octahedra and slightly distorted tetragonal LnOs-antiprisms. 
  Reference    (Z. Naturforsch. 53b, 5—8 [1998]; eingegangen am 23. Oktober 1997) 
  Published    1998 
  Keywords    Copper, Holmium, Borate, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0005.pdf 
 Identifier    ZNB-1998-53b-0005 
 Volume    53 
3Author    SvetlanaN. Nikolaeva3, EvgeniV. Avtomonov, Jörg Lorberthb, ValeryS. Petrosyan3Requires cookie*
 Title    The Reaction of Bis[bis(trimethylsilyl)amino]germylene with Bromocyanogen and the Crystal Structure of Bis[bis(trimethylsilyl)amino]bromocyanogermane  
 Abstract    Bis[bis(trimethylsilyl)amino)]germylene (1) reacts with bromocyanogen to give bis[bis(trimethylsilyl)amino]bromocyanogermane (2). 2 crystallises from petroleum ether as a colourless solid which has been characterised by IR, H,I3C, 29Si NMR spectroscopy, ele­ mental analysis and X-ray diffractometry. 
  Reference    (Z. Naturforsch. 53b, 9—12 [1998]; received October 7 1997) 
  Published    1998 
  Keywords    Germanium, Germylene, Germyl Cyanide, X-Ray Data 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0009.pdf 
 Identifier    ZNB-1998-53b-0009 
 Volume    53 
4Author    J. Seemann, W. PreetzRequires cookie*
 Title    Schwingungsspektren und Normalkoordinatenanalyse von Hexathiocyanatoplatinat(IV), Kristallstruktur von [Py2CH2][Pt(SCN)6] Vibrational Spectra and Normal Coordinate Analysis of Hexathiocyanatoplatinate(IV), Crystal Structure of [Py2CH2][Pt(SCN)6]  
 Abstract    By treatment of [PtCl6]2-with an excess of SCN~ in aqueous solution [Pt(SCN)6]2~ is formed. The X-ray structure determination on a single crystal of [Py2CH2][Pt(SCN)6] (orthor-hombic, space group Pna21? a = 15.5084(9), b = 11.8444(11), c = 13.2830(9)A, Z = 4) shows, that the thiocyanate groups are exclusively S-coordinated with average Pt-S distances of 2.378 A and Pt-S-C angles in the range from 103.1° to 108.1°. Based on the molecular parameters of the X-ray determination the low temperature (10 K) IR and Raman spectra have been assigned by normal coordinate analysis. The valence force constant is fd(PtS) = 1.62 mdyn/A. 
  Reference    (Z. Naturforsch. 53b, 13—16 [1998]; eingegangen am 15. Oktober 1997) 
  Published    1998 
  Keywords    Hexathiocyanatoplatinate(IV), IR Spectra, Raman Spectra, Normal Coordinate Analysis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0013.pdf 
 Identifier    ZNB-1998-53b-0013 
 Volume    53 
5Author    Sabine Schlecht, Soheila Chitsaz, Bernhard Neumüller, Kurt DehnickeRequires cookie*
 Title    Die Kristallstrukturen des Diphenylphosphinsäureamids, Ph2P(0)NH 2, und seines Cäsiumsalzes [Cs{Ph2P(0)NH}] Crystal Structures of Diphenylphosphinic Acid Amide, Ph-,P(0)NH-, and of its Cesium Salt [Cs{Ph2P(0)NH}]  
 Abstract    The crystal structures of the monoclinic form of Ph2P(0)NH2 and of its cesium salt, [Cs{Ph2P(0)NH}l have been determined by X-ray methods. Ph2P(0)N H 2: Space group P2,/c, Z = 16, lattice dimensions (-80°C): a = 2530.2(3), b = 858.9(2), c = 2135.5(3) pm, ß = 110.78(1)°, R , = 0.055. Diphenylphosphinic acid amide forms dimeric molecules via N-H- • O hydrogen bonds, the dimeric units again are associated via hydrogen bonds to form infinite double chains along the crystallographic c axis. [Cs{Ph2P(0)NH}]: Space group Pccn, Z = 8 , lattice dimensions (-83°C): a = 1262.8(1), b = 2632.3(2), c = 769.1(1) pm , R\ = 0.024. The compound is associated via Cs-O and Cs-N contacts along the crystallographic [001] axis forming a tubular arrangement. There are no hydrogen bonds. 
  Reference    (Z. Naturforsch. 53b, 17—22 [1998]; eingegangen am 3. November 1997) 
  Published    1998 
  Keywords    Phosphinic Acid Amide, Cesium, Crystal Structure 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0017.pdf 
 Identifier    ZNB-1998-53b-0017 
 Volume    53 
6Author    Yoshitaka Matsushitab, MercouriG. KanatzidisRequires cookie*
 Title    Synthesis and Structure of I ^ G e S  
 Abstract    The compound Li4 GeS4 has been prepared as transparent, light yellow moisture-sensitive crystals. Li.(GeS4 belongs to the space group Pnma with a = 14.107(6) A, b = 7.770(3) A and c = 6.162(2) A. The crystal structure was solved by direct-methods. The final R and /?H-values are 1.85 and 1.65% for 866 observed reflections. The Li4 GeS4 structure has three crystallographically independent lithium sites and one germanium site. The lithium atoms adopt two different coordination types. The Lil atom is coordinated to five sulfur atoms in a square pyramidal geometry, while the Li2 and Li3 atoms have distorted tetrahedral coordination. The Ge atom is tetrahedrally coordinated by four sulfur atoms and is found as [GeS4 ]4-units. The anisotropic three-dimensional crystal structure of Li4 GeS4 is described. 
  Reference    (Z. Naturforsch. 53b, 23—30 [1998]; received October 10 1997) 
  Published    1998 
  Keywords    Lithium, Germanium, X-Ray Data, Crystal Structure, Raman Spectra 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0023.pdf 
 Identifier    ZNB-1998-53b-0023 
 Volume    53 
7Author    Wolfgang Jeitschko, HorstA. Mons, Ute Ch, ManfredH. Rodewald, MöllerRequires cookie*
 Title    The Crystal Structure of the Potential Ferroelectric Calcium Rhenate(VI, VII) CanRe4 0 24 and its Relation to the Structure of S rn 0 s40 24  
 Abstract    The title compound was prepared in well-crystallized form by thermal decomposition of Ca5Re20i2. Its structure was determined from single-crystal X-ray diffractometer data: /4 j, a = 1107.0(1), c = 1609.3(1) pm, Z = 4, R -0.056 for 4565 structure factors and 119 variable parameters. The calcium atoms occupy seven different sites with 8, 9, or 10 oxygen neighbors. The two different rhenium atoms are octahedrally coordinated by oxygen atoms with average Re-O distances of 193.1 and 187.7 pm for the six-and seven-valent rhenium atoms, respectively. The compound shows Curie-Weiss behavior with a magnetic moment of n exp = 1.15(±0.10) Pb per Re(VI) atom. The structure is closely related to that of Srn0s4024 which, however, crystallizes in the space group I2la. The difference between the two structures arises through the higher coordination numbers of the strontium atoms. It is suggested that at high temperature both compounds crystallize in the common higher symmetry space group I4\/a. Since CanRe4024 crystallizes in the pyroelectric class 4 this compound is expected to be ferroelectric. 
  Reference    (Z. Naturforsch. 53b, 31—36 [1998]; received October 17 1997) 
  Published    1998 
  Keywords    Crystal Structure, Ferroelectrics, Mixed Valence, Rhenates, Perrhenates 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0031.pdf 
 Identifier    ZNB-1998-53b-0031 
 Volume    53 
8Author    H. Möhrle, J. MehrensRequires cookie*
 Title    Reaktivität nitrophenylsubstituierter cyclischer Amine bei Dehydrierungen The Reactivity of Nitrophenyl Substituted Cyclic Amines with Dehydrogenations  
 Abstract    Piperidine and perhydroazepine bearing a 1 -(4-nitrophenyl) substituent were inert to mercury-edta, while the a-pipecoline derivative gave an aminoketone with cleavage of the heterocycle. However the corresponding (2-nitrophenyl) compounds reacted to give respectively a piperidin-2-one, an aminopentanal and an aminohexanone. By an additional substituent in 2'-position the p-nitro compounds underwent dehydrogenation too. With a methyl group resulted a pattern analogous to o-nitro products. A neighbouring hydroxymethyl function enhanced the reaction with formation of benzoxazines and if possible their further oxidized derivatives, the hydroxylactams. 
  Reference    (Z. Naturforsch. 53b, 37 [1998]; eingegangen am 8. Oktober 1997) 
  Published    1998 
  Keywords    Lactam, Iminium Salt, Aminoketone, N, 0-Acetal, Neighbour Group 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0037.pdf 
 Identifier    ZNB-1998-53b-0037 
 Volume    53 
9Author    B. Wulff, Hk Wedel, Müller-BuschbaumRequires cookie*
 Title    Zur Kristallchemie von Telluraten mit Mn2+ im kationischen und anionischen Teil der Kristallstruktur: (Mn2?4Cuo,6)Te06, Ba2M nTe06 und Pb(Mn0,5 Te0,5 )O3 On the Crystal Chemistry of Tellurates Containing Mn2+ in the Cationic and Anionic Part of the Crystal Structure: (Mn2 4Cu0 6)Te06, Ba2MnTe06 and Pb(Mn0 5Te0 5) 0 3 L  
 Abstract    Single crystals of (Mn2.4Cu0 6)Te06 (I), Ba2MnTe06 (II) and Pb(Mn0 5Te0 5) 0 3 (III) have been prepared by crystallization from fluxes. X-ray investigations led to rhombohedric sym­ metry (I): R3, (II): R3m with the trigonal lattice constants (I): a = 8.826(1), c = 10.687(2) Ä, Z = 2. (II): a = 5.817(8), c = 14.244(3) A, Z = 3. Compound (III) crystallizes with cubic symmetry P43m, a = 4.045(3) A, Z = 1. (I) is the first example of a manganese(II) tellurate and belongs to the structure type of A3X 0 6 compounds like (Mn2In)Sb06, Mn3W 0 6 and Ca3U 0 6. (II) exemplifies an ordered and (III) a disordered variation of the perovskites. 
  Reference    (Z. Naturforsch. 53b, 49—52 [1998]; eingegangen am 15. Oktober 1997) 
  Published    1998 
  Keywords    Manganese, Copper, Lead, Barium, Tellurates 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0049.pdf 
 Identifier    ZNB-1998-53b-0049 
 Volume    53 
10Author    Hk Wulff, Müller-BuschbaumRequires cookie*
 Title    Zur Kristallchemie der Kupfer(II)-ZinkteIlurate Cu5 Zn4Te3 0 18  
 Abstract    Cuj^Znj^TeOg, mit einer Notiz über Cul95Co1?5T e06 On the Crystal Chemistry of the Copper(II) Zinc Tellurates Cu5Zn4Te30 ,8 and Cu, 5Zn, 5Te06 with a Note on Cu, 5Co, 5Te06 L. Single crystals of Cu5Zn4Te30 , 8 (I), Cu, 5Zn, 5Te06 (II) and Cu, 5Co, 5Te06 (III) have been prepared and investigated by X-ray work. The structure of (I) was solved in the monoclinic space group C^-C2, a = 14.834(2), b = 8.801(1), c = 10.375(2) Ä, ß = 93.27(2)°, Z = 4. (II) and (III) crystallize with cubic symmetry, space group Th-Ia3, a{U) = 9.557(1), a(III) = 9.570(1) Ä, Z = 8. (I) shows a complicated structure formed by Te06 octahedra isolated from each other, Zn20 6 double tetrahedra and Zn20 8 double square pyramids. These polyhedra are incorporated into a network of edge and corner connected stretched C u06 octahedra. (II) and (III) are isotypic to Cu3T e06 and have a (Cu/M)30 6 octahedra network, statistically occupied by Cu2+ and Zn2+ or Cu_+ and Co2+. 
  Reference    (Z. Naturforsch. 53b, 53—57 [1998]; eingegangen am 27. Oktober 1997) 
  Published    1998 
  Keywords    Copper, Zinc, Cobalt, Tellurate, Crystal Structure 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0053.pdf 
 Identifier    ZNB-1998-53b-0053 
 Volume    53 
11Author    W. Müncha, L. Walz, M. KönigbRequires cookie*
 Title    Magnetische Eigenschaften von [C u JO C ^ C F ^ N ^ H t^ IN C O ^ im Bereich von 10 bis 240 K Magnetic Properties of [Cu{OCH2CH2N(C4H9)2 }NCO]4 in the Temperature Range from 10 to 240 K  
 Abstract    The magnetic properties of the title compound were re-investigated, since a new phase below 240 K has recently been identified. The exchange parameters were evaluated from the temperature dependence of the magnetic susceptibility with a Heisenberg operator taking into account the high pseudo-symmetry of the tetrameric units observed. 
  Reference    (Z. Naturforsch. 53b, 58—62 [1998]; eingegangen am 16. Oktober 1995 -31. Oktober 1997) 
  Published    1998 
  Keywords    Copper Complexes, Magnetic Properties, Theoretical Calculations 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0058.pdf 
 Identifier    ZNB-1998-53b-0058 
 Volume    53 
12Author    Rainer Niewa3, GrigoriV. Vajenine3, FrancisJ. Disalvo, Haihua Luob, WilliamB. YelonbRequires cookie*
 Title    Unusual Bonding in Ternary Nitrides: Preparation, Structure and Properties of Ce2MnN3  
 Abstract    CeiMnNj was prepared by reaction of cerium nitride and manganese with nitrogen gas at 900 °C. It crystallizes isotypic to AC2MN3 (Ac = U, Th; M = Cr, Mn) and Ce^CrN^, space group Immm (No. 71), a = 3.74994(6) A, b = 3.44450(6) A and c = 12.4601(2) A. The manganese atoms are coordinated in a nearly square planar fashion by four nitrogen atoms. These corner-connected MnN* units form infinite J. [MnN2N2/ 2 ] chains, which run parallel to each other along the crystallographic a-axis, forming the motif of hexagonal rod packing. Cerium atoms connect the chains into a three-dimensional network. The results of measurements of the magnetic susceptibility, as well as of the electrical resistivity suggest metallic behavior. Electronic effects leading to shorter bonds between manganese and bridging nitrogen atoms than between manganese and terminal nitrogen atoms in the J. [MnN2N2/ 2 ] chains were investigated through extended Hiickel and LMTO band structure calculations. Issues pertaining to stability of this and some other nitridometallate structures are discussed. 
  Reference    (Z. Naturforsch. 53b, 63—74 [1998]; received September 17 1997) 
  Published    1998 
  Keywords    Ternary Nitride, Crystal Structure, Magnetic Susceptibility, Electrical Resistivity, Extended Hiickel Method 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0063.pdf 
 Identifier    ZNB-1998-53b-0063 
 Volume    53 
13Author    Vibrational Spectra, Sandra Loss, Caroline RöhrRequires cookie*
 Title    RbAsF6, CsA sF 6 und RbSbF6: Kristallstrukturen, Thermische Phasenumwandlungen und Schwingungsspektren RbAsF6, CsAsF6 and RbSbF6: Crystal Structures, Thermal Phase Transitions  
 Abstract    The title compounds are isostructural to CsSbFö and crystallize with the KOsFö structure type (space group RS, Z = 3) with the lattice constants a = 749.7(1) pm, c = 758.9(1) pm (RbAsFö), a = 772.3(1) pm, c = 805.0(1) pm (CsAsFö) and a = 767.0(1) pm, c = 786.1(2) pm (RbSbF6). The structures exibit nearly ideal [MFö]-octahedra, the alkaline cations are coordinated by 12 fluorine ions in a distorted cuboctahedral geometry. Cations and complex anions form a slightly distorted CsCl arrangement. On heating, the arsenates transform to a NaCl arrangement with disordered [AsF6] ions, whereas the antimonates of Rb and Cs form the corresponding disordered CsCl type at higher temperatures. The phase transitions and the i. r. and Raman spectra as well as the structural relations to the remaining hexafluoropnictates A![MVF6] are discussed. 
  Reference    (Z. Naturforsch. 53b, 75—80 [1998]; eingegangen am 14. Oktober 1997) 
  Published    1998 
  Keywords    Alkaline Hexafluoropnictates, Crystal Structure, Thermal Phase Transitions, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0075.pdf 
 Identifier    ZNB-1998-53b-0075 
 Volume    53 
14Author    Alfonso Castiñeiras, Ricardo Domínguez3, Leandro Bresolinb, Adaí Lto, Joao Bortoluzzib, RobertAlan Burrowb, Manfredo HömerbRequires cookie*
 Title    Synthesis and Crystal Structure of a Novel Neutral Polymeric Lead(II)-thiosemicarbazonato Complex  
 Abstract    Polymeric Lead(II) Complex, 2-Acetylpyridine-4N-methylthiosemicarbazone, X-Ray Data The reaction between lead(II) acetate and 2-acetylpyridine 4 N-methylthiosemicarbazone (H4ML) produced a complex of the formula [Pb(4ML)(OOCMe)] with an unusual polymeric structure in which the lead atom is hepta-coordinate, the deprotonated thiosemicarbazone is a tetradentate bridge, and the acetate group both chelates and bridges. The complex crystallizes in the triclinic space group PI with a = 8.860(2), b ß = 98.67(3), 7 = 107.87(5)°, V = 704.1(3) A , Z = 
  Reference    (Z. Naturforsch. 53b, 81—86 [1998]; received August 26 1997) 
  Published    1998 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0081.pdf 
 Identifier    ZNB-1998-53b-0081 
 Volume    53 
15Author    Karl-Friedrich Tebbe, Theo Gilles, Bernhard RadkeRequires cookie*
 Title    Untersuchungen an Polyhalogeniden  
 Abstract    , XXXIII [1] Polyiodide des Nickelhexamminkomplexes: Nickelhexamminbistriiodid [Ni(NH3)6](I3) 2 und Nickelhexamminbispentaiodid [Ni(NH3)6 ] (I5)2 Studies of Polyhalides, 33 [11 Polyiodides of the Nickel Hexammine Complex: Nickelhexammine Bistriiodide [Ni(NH3)6](I3)2 and Nickelhexammine Bispentaiodide [Ni(NH3)6l(I5) The compounds [Ni(NH3)6 ](I3) 2 and [Ni(NH3)6 ](I5) 2 have been prepared by the reaction of stoichiometric amounts of [Ni(NH3)6 ]Cl2, KI, and I2 in water. The already known triiodide crystallizes in the monoclinic space group C2/c with a = 1541,0(10), b = 1521.6(8), c = 876.1 (7) pm, ß = 101.44(6)° and Z = 4. The new pentaiodide crystallizes in the monoclinic space group P2,/n with a = 899.6(4), b = 1681.6(5), c = 946.8(7) pm, ß = 110.90(5)° and Z = 2. Both compounds contain nearly octahedral cations [Ni(NH3)6]2+ and simultaneously a linear and a bent triiodide ion I3_ with nearly equal bond lengths or a unsymmetrical V-shaped pentaiodide ion I5_ which is lined up to a new type of pentaiodide chain. 
  Reference    (Z. Naturforsch. 53b, 87—92 [1998]; eingegangen am 25. September 1997) 
  Published    1998 
  Keywords    Polyiodide, Triiodide, Pentaiodide, Nickel Hexammine Complex, Crystal Structure 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0087.pdf 
 Identifier    ZNB-1998-53b-0087 
 Volume    53 
16Author    X. =. Cl, I. W. Br, Preetz, J.-G UttechtRequires cookie*
 Title    Kristallstrukturen,195 Pt-NMR  
 Abstract    Verschiebungen, Schwingungsspektren und Normalkoordinatenanalysen von fraws-Dihalogeno-bis(oxalato)platinaten(IV), ^raw5-[PtX2(ox)2]2~, X = Cl, Br, I Crystal Structure, 195 Pt NMR Chemical Shifts, Vibrational Spectra, and Normal Coordinate Analyses of rrans-Dihalogeno-bis(oxalato)platinates(IV), trans-[PtX2(ox)2]2 -, /rans-Dichloro-bis(oxalato)platinate(IV), frans-Dibromo-bis(oxalato)platinate(IV), rrans-Diiodo-bis(oxalato)platinate(IV), Crystal Structure, Vibrational Spectra By reaction of («-Bu4N)2[Pt(ox)2] with elemental halogens in dichloromethane the com­ plexes frarcs-[PtX2(ox)2]2-(X = Cl, Br, I) are formed. The crystal structures of trans-(py2CH2)[PtCl2o (ox)2]-C4 H60 3 (1) (monoclinic, space group P2,/«, a = 12.119(3), b = 14.926(2), c = 12.666(4) Ä, ß = 91.26(3)°, Z = 4), rran5-(py?CHi)[PtBr2(ox)2] (2) (monoclinic, space group P2]/n, a = 7.402(8), b = 16.997(3), c = 14.898(3) Ä, ß = 98.15(3)°, Z = 4) and rrans-(py2CH2)[PtI2(ox)2]-C3H7NO (3) (orthorhombic, space group Pnma, a = 10.380(9), b = 13.973(2), c = 17.440(4) A, Z = 4) have been determined by single crystal X-ray diffraction analysis. Highly resolution IR and Raman spectra were measured at low temperature (10 K). Using the molecular parameters of the X-ray determinations normal coordinate analyses based on a modified valence force field have been performed and the normal modes of vibration are assigned. The valence force constants are fd(PtCl) = 2.19, fd(PtBr) = 1.68, fd(PtI) = 1.28 mdyn/A and fd(PtO) ranges from 2.71 to 2.82 mdyn/A. The observed Pt NMR shifts are <$(195Pt) = 6472.4 (X = Cl), 6027.1 (Br) and 5142.7 ppm (I). 
  Reference    (Z. Naturforsch. 53b, 93—100 [1998]; eingegangen am 25. September 1997) 
  Published    1998 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0093.pdf 
 Identifier    ZNB-1998-53b-0093 
 Volume    53 
17Author    Frank Hintermaier3, Sylvia Helding3, LeonidB. Volodarskyb, Karlheinz Sünkel3, Kurt Polboma, Wolfgang BeckRequires cookie*
 Title    Transition Metal Complexes of Nitroxide Radicals. Palladium, Platinum, Pentamethylcyclopentadienyl Rhodium and Iridium Complexes, and a-Aminocarboxylate Complexes with Derivatives of 2,5-Dihydroimidazole-l-oxyls  
 Abstract    Nitroxide Radicals, 2,5-Dihydroimidazole-l-oxyls, Transition Metal Complexes 2,5-Dihydroimidazoline-l-oxyl radicals I, II with imino substituents coordinate to Pd(II) and Pt(II) complexes with formation of the N,N chelate complexes 1-6. With oxygen containing substituents either monodentate N-coordination to give 8 or N ,0 chelate formation to give 9 takes place, depending on the position of the oxygen atom relative to the ring nitrogen atom. With radicals III that also have the second ring nitrogen atom oxidized and the Rh(III) or Ir(III) complexes [Cp*MCl2]2 the 0 , 0 chelates 11 -13 could be obtained, while with Na2PdCl4 the heterocycle was destroyed with formation of a N,N chelate complex 10 of an a-nitroso-oxime ligand. The orthopalladated 2,2,5,5 tetramethyl-4-phenyl-2,5-dihydroimidazoline-l-oxyl complex 7a reacts with several a-amino acidates under splitting of the dichloro bridge with formation of the C,N/N,0-bis-chelate complexes 7b-f. The molecular structures of 2 and 10 were determined by X-ray diffraction. 
  Reference    (Z. Naturforsch. 53b, 101—109 [1998]; eingegangen am 4. September 1997) 
  Published    1998 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0101.pdf 
 Identifier    ZNB-1998-53b-0101 
 Volume    53 
18Author    U. Steiner, W. ReicheltRequires cookie*
 Title    Zum System Sr/Mo/O: Phasendiagramm, Synthese und Charakterisierung der ternären Verbindungen On the System Sr/Mo/O: Phase Diagram, Synthesis and Characterization of Ternary Compounds  
 Abstract    The phase diagram of the ternary system Sr/Mo/O has been determined at a temperature of 1000°C. Powder samples of the ternary compounds SrM o04, Sr3M o06, SrM o03, Sr2M o04 and SrMo50 8 were prepared by solid state reactions. The thermochemical data of all ternary compounds were determined.oA new compound, Sr3Mo20 7, with a layered perovskite structure (a = 3.967(1), c = 20.588(5) A, I4/mmm) was found. Rietveld analysis based on powder X-ray diffraction data confirms that the compound Sr2M o04 has the K7NiF4 structure (I4/mmm) with a = 3.9176(1), c = 12.8545(4) A. 
  Reference    (Z. Naturforsch. 53b, 110—116 [1998]; eingegangen am 10. Oktober 1997) 
  Published    1998 
  Keywords    Strontium Molybdate, Phase Diagram, Synthesis, Thermochemical Data, Electric Properties 
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 Identifier    ZNB-1998-53b-0110 
 Volume    53 
19Author    Requires cookie*
 Title    Synthese von Erdalkalimetallocenen aus Erdalkalimetall- bis[bis(trimethylsilyl)amid] und 6-Methyl-6-phenylfulven  
  Reference    (Z. Naturforsch. 53b, 117 [1998]) 
  Published    1998 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0117.pdf 
 Identifier    ZNB-1998-53b-0117 
 Volume    53 
20Author    Henri Brunner, Bernd HaßlerRequires cookie*
 Title    Enantioselective Catalysis, 122 [1] Synthesis of New Optically Active 3.5-DinitrosalicyloxazoIines  
 Abstract    New optically active 3,5-dinitrosalicyloxazo-lines, derived from 3,5-dinitrosalicylonitrile and the chiral aminodiols (lS,2S)-(+)-2-am ino-l-phe-nyl-l,3-propanediol, (2S)-(-)-2-amino-l,l,4,4-te-traphenyl-l,4-butanediol and (2S)-(-)-2-amino-l,l-diphenyl-l,3-butanediol, were prepared and used as in situ catalysts for enantioselective cyclo-propanation reactions. 
  Reference    (Z. Naturforsch. 53b, 126—128 [1998]; eingegangen am 27. O ktober 1997 3.) 
  Published    1998 
  Keywords    5-Dinitrosalicyloxazolines, Enantioselectivity, Catalysis, Cyclopropanations 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0126_n.pdf 
 Identifier    ZNB-1998-53b-0126_n 
 Volume    53 
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