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1990 (280)
101Author    Á. Vez, C. Rés, M. Isternas, O. Argarita, E. Tero, R. Nrique, U. Lr Ic, LlerRequires cookie*
 Title    Syntheses and Electrochemical Properties of |C5M e5Ru]+ Complexes with Polycyclic Arenes. Crystal Structure of |(C5M e5)Ru( //'-chrysene)] PF6 * 0.5 M e2CO  
 Abstract    M ononuclear and binuclear com pounds [(C5M e5)Ru(//6-arene)PF6 and [(C5M e5R u)2(//6,/76-arene)](PF6)-, were prepared by reacting (C5M e5)RuCl2, the arene and silver acetate with subsequent addition o f N H 4PF6, for arene = phenanthrene, chrysene, tripheny-lene, fluorene, bifluorene. biphenyl and 4,4'-biphenyl. The mononuclear com pounds were also prepared for arene = naphthalene, anthracene, pyrene and coronene. The 'H and l3C N M R spectra are reported. By cyclic voltammetry all compounds show a first reduction potential that is considerably more positive compared with the free arene. The first cathodic wave is irreversible for a wide range o f scanning speeds. However, the mononuclear coronene and the binuclear phenanthrene com pounds show reversibility. The crystal structure o f [(CsM es)Ru(/76-chrysene)]PF6-0.5 Me^CO was determined by X-ray diffraction (3797 unique observed reflexions, R = 0.098). Crystal data: a = 1689.2(2), b = 1524.0(8), c = 2263.5(3) pm, ß = 107.22(1) , space group P 2,/«, Z = 8. Crystallographically independent, two cations [(C5M e5)Ru(>76-chrysene)]+ and two anions PF6~ are present, but their structures are essentially equal. The [C5M esRu]+ unit is bonded to one o f the terminal benzene rings o f the chrysene in a sandwich manner; the rings bonded to Ru are nearly coplanar. The PF6~ ions and the C5M e5 rings exhibit strong thermal vibrations. 
  Reference    Z. Naturforsch. 45b, 658 (1990); received November 18 1989 
  Published    1990 
  Keywords    Pentamethylcyclopentadienyl-arene-ruthenium Hexafluorophosphates Synthesis, N M R Spectra, Reduction Potentials, Crystal Structure 
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 Identifier    ZNB-1990-45b-0658 
 Volume    45 
102Author    Sabine Paashaus, R. Üdiger, K. NiepRequires cookie*
 Title      
 Abstract    The pseudobinary systems E T e-E T eH a l (E/H al = A l/I,Br; G a/I.B r,C l; In/I,Br) contain the intermediate phases E3Te3Hal, having incongruent melting behavior (decom position at temperatures between 386 °C and 718 °C). The crystal structures (orthorhombic, Pnma) o f the isotypic ternary phases contain one-dim ensional macrom olecules, in which (Te3 3EInHal)-tetrahedra and (Te3 3G a2nTe3/3) units (staggered conform ation) are linked by com m on T e -T e -edges. The macromolecules can be described in terms o f fragments o f an ETe-crystal structure o f the GaTe structural type. In this way, halogen acts as an oxidizing agent which then satu­ rates the free valence at the Em positions. Larger fragments o f a respective ETe-crystal struc­ ture are expected to be present in the crystal structure o f InTeC lv (x ~ 0.16) which is an inter­ mediate phase (m.p. = 418 °C; incongruent) in the quasibinary system In T e-In T eC l. 
  Reference    Z. Naturforsch. 45b, 667—6 (1990); eingegangen am 6. N ovem ber 1989 
  Published    1990 
  Keywords    Phase Relations, Crystal Structure, Mixed Valency Phases 
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 Identifier    ZNB-1990-45b-0667 
 Volume    45 
103Author    Z. NaturforschRequires cookie*
 Title    Synthese und Strukturuntersuchungen von Iodocupraten(I) XII. [(DMF)2 HlLlMe3X4 ]-Halogenometallate(I) mit neuartigen Tetraederdreifachketten [1]  
 Abstract    Syntheses and Structure A nalyses o f Iodocuprates(I) X II. [(D M F)2H ]!jM e 3X 4]-H alom etallates(I) w ith N ew T etrahedratriple C hains [1] R om an Frydrych, T h o m as M uschter, Irene B rüdgam und H ans H artl* Halocuprates(I), Haloargentates(I), N ,N-D im ethylform am idinium , Crystal Structure, Vibrational Spectra N,N-Dim ethylform am idinium -halom etallates(I), [(D M F)2H ][M e,X 4] with M e3X 4 = Cu3I4~, Cu3I2Br2-, CU3I3CI-, A g2CuI4_, A g3I4-, AgjI^Br" and A g3I3C r were obtained by reacting Cul or A gl with HI, HBr or HC1 in D M F. The crystal structures o f the isostructural compounds (space group Pccn) are built by hydrogen-bridged D M F m olecules, (D M F)2H +, as cations and a new type o f polymeric anion formed by edge sharing tetrahedra triple chains. The chains consist o f a double layer o f halogen atom s where Cu(I) and A g(I) cations are located in tetra­ hedral holes. There are two kinds o f halogen positions in the chains. One o f them bridges two metal ions, the other is coordinated by four metal ions. In the anion chains L[Cu3I2Br2"], L[Cu3I3C1-], ^[AgjIjBr'] and JJAgjIjCl'] the lighter halogen atoms occupy the positions bridg­ ing two metal ions. The O -H -O distances range from 2 3 5 -2 4 3 pm. They indicate strong hy-drogen-bonding between the two D M F molecules in the (D M F),H + cations. 
  Reference    Z. Naturforsch. 45b, 679 (1990); eingegangen am 3. N ovem ber 1989 
  Published    1990 
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 Identifier    ZNB-1990-45b-0679 
 Volume    45 
104Author    Requires cookie*
 Title     
 Abstract    y n t h e s e u n d K r is ta llstr u k tu r vo n [A g (P h N 3C 6H 4N 3 (H) P h) ] 4 , e in e m te tr a m e r e n 
  Reference    Z. Naturforsch. 45b, 689 (1990) 
  Published    1990 
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 Identifier    ZNB-1990-45b-0689 
 Volume    45 
105Author    Requires cookie*
 Title      
 Abstract    P h 4)2lM n(Se4)2l; Synthese und Kristallstruktur (PPh4)2 [Mn(Se4)2]; Synthesis and Crystal Structure G ertrud K räuter, My-Linh Ha-Eierdanz, Ulrich Müller* und K urt Dehnicke* F achbereich C hem ie d er U n iversität M arb u rg , H ans-M eerw ein-S traße, D-3550 M a rb u rg /L ah n 
  Reference    Z. Naturforsch. 45b, 695 (1990) 
  Published    1990 
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 Identifier    ZNB-1990-45b-0695 
 Volume    45 
106Author    Horst Weber, ThomasR. OhnRequires cookie*
 Title    Synthese und Photoisomerisierung von sterisch gehinderten 2,6-Dialkylpyridin-N-oxiden Synthesis and Photoisom erization of Sterically Hindered 2,6-Dialkylpyridine-N-oxides  
 Abstract    In stitu t für Pharm azeutische C hem ie d er H ein rich-H eine-U niversität D üsseldorf, U niversitätsstraße 1, D-4000 D ü sse ld o rf 1 
  Reference    Z. Naturforsch. 45b, 701 (1990) 
  Published    1990 
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 Identifier    ZNB-1990-45b-0701 
 Volume    45 
107Author    Requires cookie*
 Title    Reaction of N-Arylphthalisoimidium Perchlorates with Amines and Aromatic Hydrocarbons under Friedel-Crafts Conditions, a New and Convenient One-Step Method for the Synthesis of 2,3-E)iaryl-3-hydroxyphthalimidines  
  Reference    Z. Naturforsch. 45b, 707 (1990) 
  Published    1990 
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 Identifier    ZNB-1990-45b-0707 
 Volume    45 
108Author    AdrianaL. Brachet-Cota, G. Erardo, BurtonRequires cookie*
 Title    An Improved Preparation of ll,19-C)xidopregn-4-ene-3,20-dione and 6,19-Oxidopregn-4-ene-3,11,20-trione  
  Reference    Z. Naturforsch. 45b, 711 (1990) 
  Published    1990 
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 Identifier    ZNB-1990-45b-0711 
 Volume    45 
109Author    Lech Chmurzynski, Adam LiwoRequires cookie*
 Title    A C N D O /2 Study of the Homoconjugation Energies of 4-Substituted Pyridine N-Oxides  
 Abstract    4-S ubstituted Pyridine N -O xides, H om oconjugation Energy, C N D O /2 , Solvation Effect H om oconjugatio n energies in vacuo have been calculated for pyridine N -oxide (PyO) a n d its 4-m ethyl-(4 PicO) and 4-n itro -(4-N O : PyO) de­ rivatives w ith the use o f the C N D O /2 m ethod. C om parison w ith the experim ental h o m o co n ju g a­ tion constants in som e ap ro tic solvents reveals the opposite order o f the stability o f hom ocom plexes than could be expected based on the calculated hom oconjugation energies. T his form al in co n sist­ ency can be explained in term s o f the solvation effect. 
  Reference    Z. Naturforsch. 45b, 717 (1990); received D ecem ber 18 1989 
  Published    1990 
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 Identifier    ZNB-1990-45b-0717_n 
 Volume    45 
110Author    Lech Chm, Adam Liwo, AlicjaW. Awrzynów, Anna TempczykRequires cookie*
 Title    C N D O /S-C I-flPD Q Studies of the Solvation Effect on the UV Spectra of Pyridine N-Oxide and its Complexes with Proton  
 Abstract    In stitu te o f C hem istry, U niversity o f G d an sk , ul. Sobieskiego 18, 80952 G dansk, Poland Z. N aturt'orsch. 45 b, 7 1 9 -720 (1 y9U); received N ovem ber 21, 1989 Pyridine N -O xide, UV Spectra, Solvation Effect, C N D O /S U sing the w-PDQ model, in w hich the solvent is sim ulated by several point dipoles an d q u a d ­ r u p l e s , we have estim ated the shift o f the UV b an d s o f pyridine N -oxide (PyO), its cationic acid (P y O H +), and hom oconjugated cation (P y O H P y O +) caused by the solvent (acetonitrile). W e have calculated the UV spectra o f b o th un so l­ vated and solvated species by the C N D O /S -C I an d C N D O /S -C I-n P D Q m ethod, respectively. W e have found th at all the bands o f all the species u n ­ d er study are blue-shifted on solvation. The m ost significant is the shift o f the long-w ave n—*n* ban d s o f pyridine N -oxide. 
  Reference    Z. Naturforsch. 45b, 719 (1990) 
  Published    1990 
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 Identifier    ZNB-1990-45b-0719_n 
 Volume    45 
111Author    M. Asahiro Kotaka, Tomoyuki Kohida, Shin SatoRequires cookie*
 Title    Experimental Evidence for 1,2-Fluorine Atom Migration in Tritiated 1.1.2-TrifluoroethyI Radical  
 Abstract    R esearch L aborato ry for N uclear R eactors, T okyo In stitute o f T echnology, 2-12-1 O okayam a, M eguro-ku, T okyo 152, Jap an Z. N aturforsch. 45 b, i l 1 -111 (1 yyu); received D ecem ber 12, 1989 1.2-Fluorine A tom M igration, T ritiated 1,1,2-Tri-fluoroethyl Radical, T rifluoroethylene, T ritium A tom T ritiated com pounds containing 2,2,2-triflu-oroethyl groups were form ed by the reaction o f tritium atom s with trifluoroethylene. The result can be accepted as definitive evidence for a 1,2-fluorine atom m igration occurring in the reaction interm ediate, tritiated l,L 2 -triflu o ro eth y l radical. 
  Reference    Z. Naturforsch. 45b, 721 (1990) 
  Published    1990 
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 Identifier    ZNB-1990-45b-0721_n 
 Volume    45 
112Author    Results, DiscussionRequires cookie*
 Title    [8]  
 Abstract    The use of coupling systems like GC-MS, G C -F T IR and LC-MS allows the identification of many com ponents without chemical reactions of the complex mixture of different plants of hay blossoms (botanical composition see Table I). 
  Reference    Z. Naturforsch. 45b, 723 (1990) 
  Published    1990 
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 Identifier    ZNB-1990-45b-0723_n 
 Volume    45 
113Author    Requires cookie*
 Title      
 Abstract    Breitlinien 185Re-und 187Re-Festkörper-NMR-Spektroskopie an Metaperrhenaten mit alkylsubstituierten Kationen der V. Hauptgruppe Wideline ,83Re and l87Re Solid-State N M R Spectroscopy of M etaperrhenates with Alkyl-Substituted Cations of M ain G roup V 
  Reference    Z. Naturforsch. 45b, 725 (1990) 
  Published    1990 
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 Identifier    ZNB-1990-45b-0725 
 Volume    45 
114Author    Iris Dieter, Bernhard LippertRequires cookie*
 Title    Coordination Chemistry of fra/is-(NH3)2Pt(II) with Uracil Nucleobases. A Comparison with cis-(NH3)2Pt(II)  
  Reference    Z. Naturforsch. 45b, 731 (1990) 
  Published    1990 
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 Identifier    ZNB-1990-45b-0731 
 Volume    45 
115Author    Requires cookie*
 Title    Ferrocen-l,r-dithiolato-und -diselenato-Derivate des Hexachlor-cyclotriphosphazens  
 Abstract    Ferrocene-l,l'-d ithiolato and -diselenato Derivatives of Hexachloro-cyclotriphosphazene Max Herberhold* a, Christine D örnhöfer1 und U lf Thewaltb a L ab o rato riu m für A norganische Chem ie d e r U n iv ersität B ayreuth, Postfach 101251, D-8580 B ayreuth b Sektion für R öntgen-und E lek tro nen b eu g u n g d er U n iv ersität U lm , O b e r e r E s e l s t e r i l , D -V ^ 0 ^ T_Tlrn et Z. N aturforsch . 45b, 7 4 1 -7 4 6 (1 9 9 0); eingegangen am 18. D ezem ber 1989 Phosphazene D erivatives, F errocene D ichalcogenato C om plexes The three pairs o f gem inal c h lo ro su b stitu en ts in h exachloro-cyclotriphosphazene, N 3P3C16, are stepwise replaced by chelating ferro cen e-1,1 '-d ich alco g en ato groups, [Fe(C 5H 4E)2]: ~, to give the spiro-cyclotriphosphazenes N 3P 3C l6_2"[(EC5H 4)2Fe]" (n = 1. 2, 3; E = S (a), Se (b)). The m olecular stru ctu re o f P ,P '-b is(ferro cen e-1,1 '-d ith io lato)-P "-dichlorocyclotriphospha-zene, N 3P3C l2[(SC5H 4)2Fe]2 (2 a) has been determ ined. 
  Reference    Z. Naturforsch. 45b, 741 (1990) 
  Published    1990 
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 Identifier    ZNB-1990-45b-0741 
 Volume    45 
116Author    Requires cookie*
 Title    [(2-Methylphenyl)phosphinlgold(I)-bromid: Eine neue Strukturvariante für intermolekulare Au — Au-Kontakte bei (Phosphan)gold(I)-halogeniden  
  Reference    Z. Naturforsch. 45b, 747 (1990) 
  Published    1990 
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 Identifier    ZNB-1990-45b-0747 
 Volume    45 
117Author    Jun OkudaRequires cookie*
 Title    A Monomeric Methanedithiolate Complex of Molybdenum  
 Abstract    M ethanedithiolate Complex, M olybdenocene Dihydride, Carbon Disulfide Hydrogenation I hermai reaction o f moiybdenocene dinydriue (f-C 5H5)2m uH2 with carbon disulfide affords a new molybdenocene complex (//5-C5H5)2M o(S2C H 2) which according to analytical and spectroscopic data contains a methanedithiolate ligand. 
  Reference    Z. Naturforsch. 45b, 753 (1990); received January 10 1990 
  Published    1990 
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 Identifier    ZNB-1990-45b-0753 
 Volume    45 
118Author    G. Erhard, U. Tri, Karl-Eberhard Schwarzhans, G. Ünter, M. AllmaierRequires cookie*
 Title    F erroceny 1-ary 1-pl u m bane Ferrocenyl-aryl-plumbanes  
 Abstract    The first example o f a diplum ba[l. l]ferrocenophane[cpPb(0 2)cp]2Fe2 has been prepared from 02PbCl2 and l,l'-dilithioferrocene-2T M E D A . The preparation o f further four ferro­ cenyl-phenyl-plumbanes, including the hitherto unknown com pounds (0 3Pbcp)2Fe, Fc2Pb20 2 and [(0 3Pb)cpFecp]FcPb0 2 has been achieved by reaction o f a mixture o f monolithioferro-cen e-T M E D A and l,l'-dilithioferrocene -2T M E D A with 0 2PbCl2 and 0 3PbCl, respectively. These com pounds have been investigated by 'H, 13C and -07Pb N M R spectroscopy as well as by half-wave potential measurements, EI, F D and PD mass spectrometry. The results were discussed in terms o f the possibility o f Pb/Fe metal orbital overlap. There is evidence from the VT 'H N M R spectra for conform ational flexibility o f the diplumba[ 1.1 ]ferrocenophane. 
  Reference    Z. Naturforsch. 45b, 755 (1990); eingegangen am 1. Februar 1990 
  Published    1990 
  Keywords    Ferrocenyl-phenyl-plumbanes, Preparation, 252C f Plasma D esorption Mass Spectra, 2°7pb N M R Spectra, Half-W ave Potential Measurements 
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 Identifier    ZNB-1990-45b-0755 
 Volume    45 
119Author    Requires cookie*
 Title    BEDT-TTF-Salze mit quadratischen Platinaten(II) als Gegenionen: [BEDT-TTF]4[Pt(CN)4]  
  Reference    Z. Naturforsch. 45b, 763 (1990) 
  Published    1990 
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 Identifier    ZNB-1990-45b-0763 
 Volume    45 
120Author    HansH. Karsch, Michael Hollstein, G.Erhard MüllerRequires cookie*
 Title    Germanium(II)-Komplexe mit Dithio-at-Chelatliganden Germ anium (II) Complexes with Dithio-ate Chelating Ligands  
 Abstract    Germanium(II), D ithiocarbam ates, D ithiophosphinates Stable germanium(II)-dithiocarbamate complexes Ge[S2C (N R 2)]2 (R = Me, Et) have been obtained from GeCl2 dioxane and Na[S2C (N R 2)]. As an intermediate, Ge(Cl)[S2C (N E t2)] also could be isolated. Likewise, Ge[S2PM e2]2 was synthesized from GeCl2 dioxane and Na[S2PM e2] and characterized by X-ray structure analysis. The germanium atom acts as a spiro-center for four sulfur atom s in a distorted ^-trigonal bipyramidal configuration which is established by two anisobidentate dithiophosphinate ligands. The axial G e ~ S bonds are sig­ nificantly longer (mean: 2.722 Ä) than the equatorial ones (mean: 2.415 Ä). The variation in the axial bonds is more pronounced (0.058 A) than in the equatorial (0.013 Ä) G e -S bonds, but this effect is much smaller than in the comparable G e ^ P M e^ C P M e ^ complex. 
  Reference    Z. Naturforsch. 45b, 775—7 (1990); eingegangen am 22. Dezember 1989 
  Published    1990 
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 Identifier    ZNB-1990-45b-0775 
 Volume    45 
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