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1993[X]
101Author    Dietlinde Högerle, Ulrich Link, U. Lf ThewaltRequires cookie*
 Title    Preparation and Structure of T ris(acetylacetonato)silicon Dichloroargentate  
 Abstract    Tris(acetylacetonato)silicon(I V) Cation, Dichloroargentate(I) A nion The ionic com pound [Si(acac)3][AgCl2] • C H 2C12 (1) was synthesized by reaction o f [Si(acac)3][H C lj and silver acetate in dichloromethane. A single­ crystal X-ray analysis shows that the cation has an octahedral tris-chelate structure and that the anion is a polymeric chain, com posed o f edge-sharing AgCl4 tetrahedra. 
  Reference    Z. Naturforsch. 48b, 691—6 (1993); received January 15 1993 
  Published    1993 
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 Identifier    ZNB-1993-48b-0691_n 
 Volume    48 
102Author    Rolf Minkwitz, Birgit BäckRequires cookie*
 Title    Über die Darstellung und spektroskopische Charakterisierung von CH3S(Br)F+SbF6" [ 1] On the Preparation and Spectroscopic Characterization of C H 3S(B r)F+SbF6~ [1]  
 Abstract    C H ,S(H)+SbF6" reacts in H F as solvent with Br2 to form C H 3S(Br)F+SbF6". The salt is stable below 195 K and has been characterized by vibra­ tional and 1H and l9F N M R spectroscopy. 
  Reference    Z. Naturforsch. 48b, 694—6 (1993); eingegangen am 30. Dezember 1992 
  Published    1993 
  Keywords    Bromofluorosulfonium Salt, Vibrational Spectra, 'H N M R Spectra, l9F N M R Spectra 
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 Identifier    ZNB-1993-48b-0694_n 
 Volume    48 
103Author    H. P. Fritz, E. PöllRequires cookie*
 Title    Mikro-Raman-spektroskopische Charakterisierung von CuInSe2-Dünnfilm-Halbleitern Micro R am an Spectroscopy of CuInSe2 Thin Films  
 Abstract    Chalcopyrite Semiconductor, Raman Spectra, Thin Films o f C u -I n -S e Structural properties for C u -I n -S e thin-films for solar cell applications formed by electro­ chemical deposition at room temperature were studied using Raman-scattering. Reactions am ong Cu, In and Se to binary com pounds and CuInSe2, respectively, were observed. It is con­ cluded that Raman scattering spectroscopy only at low temperature conditions shows the real com position o f the electrochemically deposited C u -I n -S e layer. It was also found by Raman spectroscopy that the CuInSe2 phase is formed by annealing as-deposited C u -I n -S e thin films preferentially at temperatures around 400 °C under selenium vapour pressure. 
  Reference    Z. Naturforsch. 48b, 697—7 (1993); eingegangen am 11. Februar 1993 
  Published    1993 
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 Identifier    ZNB-1993-48b-0697 
 Volume    48 
104Author    Christian Klasen, Guido Effinger, Siegbert Schmida, Ingo-Peter LorenzRequires cookie*
 Title    Offene und geschlossene P-funktionalisierte Diferriophosphonium-Salze des Typs |{CpFe(CO)2}2P(Ph)Rl+ X " bzw. |{/i-CO (CpFeCO)2}P(Ph)R |+ X"  
 Abstract    Open and Closed P-Functionalized Diferriophosphonium Salts of the Type [{CpFe(CO)2}2P (P h)R r X" and [{//-CO(CpFeCO)2}P(Ph)R]+ X" The reaction o f Ph(R)PSiM e3 with an excess o f C pFe(CO)2Cl results in the elimination o f M e3SiCl to give the open diferriophosphonium halides [{C pF e(C O),}2P(Ph)R]Cl (R = H, Ph, C H 2SiM e3, Me) (1 a-d). The deprotonation reaction o f 1 a with KOBu' at -7 8 °C results in the formation o f the unstable diferriophosphane {CpFe(CO)2} 2PPh (3), which reacts with alky­ lating reagents RX (R = Me, C H 2Ph, C H 2COOEt; X = Cl, I) to give the P-functionalized di­ ferriophosphonium halides [{CpFe(CO)2} 2P(Ph)R]X (ld '-f) The light-sensitive compounds l b -f are found to eliminate readily a CO ligand upon photolysis to give the corresponding closed P-functionalized diferriophosphonium salts [{//-CO (CpFeC O)2}P(Ph)R]X (2 b -f) with a bridging CO ligand and a F e -F e bond. The mass, IR and N M R spectra o f 1, 2 and the results o f a crystal structure determination o f [{//-CO (CpFeC O)2}PPh2]BPh4 (2b') are report­ ed and discussed. 
  Reference    Z. Naturforsch. 48b, 705 (1993); eingegangen am 31. August 1992 
  Published    1993 
  Keywords    Phosphido Bridges, Diferriophosphane Intermediate, Diferriophosphonium Salts, Elimination Reaction 
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 Identifier    ZNB-1993-48b-0705 
 Volume    48 
105Author    Alexander Lichtblau, Hans-Dieter Hausen, Wolfgang KaimRequires cookie*
 Title    First Structural Characterization of an Easily Oxidized Derivative o f 1,4-Dihydroquinoxaline  
 Abstract    The first crystal structure analysis o f a 1,4-dihydroquinoxaline is described by example o f the l,4-bis(re/-/-butyldimethylsilyl) derivative. In the solid state, this molecule exhibits a non-planar heterocycle with a dihedral angle o f 156.3° along the N -N axis in the boat-shaped 87r electron ring system. The alkyl groups o f the Si(/er/-Bu)M e2 substituents are arranged as to minimize steric repulsion. Despite the reduced n electron conjugation due to non-planarity, the com pound is oxidized reversibly to an EPR detectable radical cation at -0 .5 9 V vs. ferro­ cene in dichloromethane. However, the second oxidation to the fully aromatic dication is elec-trochemically irreversible. A comparison with previously obtained results illustrates the struc­ tural flexibility o f the non-aromatic 1,4-dihydro-1,4-diazine ring system which is strongly affected by rather weak non-bonded interactions. 
  Reference    Z. Naturforsch. 48b, 713 (1993); eingegangen am 21. Dezember 1992 
  Published    1993 
  Keywords    Heterocycles, Organosilicon Compounds, Crystal Structure, Cyclic Voltammetry, Conformation 
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 Identifier    ZNB-1993-48b-0713 
 Volume    48 
106Author    H. Schulz, H. Pritzkow, W. SiebertRequires cookie*
 Title    Umsetzung von Bis(trimethylgermyl)acetylen und Bis(trimethylstannyl)acetylen mit Diboran(4)-Derivaten Reaction of Bis(trimethylgermyl)acetylene and Bis(trimethylstannyl)acetylene with Diborane(4)-Derivatives  
 Abstract    I,1 -Bis(chlormethylboryl)-2,2-bis(chlordimethylgermyl)ethene, 1,1 -Bis(dimethylaminomethylboryl)-2,2-bis(chlordimethylgermyl)-ethene Diboron tetrachloride reacts with bis(trimethylgermyl)acetylene to give l,l-bis( 
  Reference    Z. Naturforsch. 48b, 719 (1993); eingegangen am 1. Februar 1993 
  Published    1993 
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 Identifier    ZNB-1993-48b-0719 
 Volume    48 
107Author    Dieter Sellmann, RichardR. UfRequires cookie*
 Title    Übergangsmetallkomplexe mit Schwefelliganden, XCVIIIX  
 Abstract    H +-gesteuerte Bildung und reversible Umwandlung der Einkern-und Zweikern-Komplexe [Ru(NO)PPh3(S2N 2H2)1C1 und [Ru(NO)('S2N 2H')l2 (S 2N 2H 2'2~ = 1,2-Ethandiamin-N,N-bis(2-benzolthiolat)(2-)) Transition M etal Complexes with Sulfur Ligands, XCVIII* H + Controlled Form ation and Reversible Conversion of the M ononuclear and Dinuclear Complexes [Ru(NO)PPh3('S2N 2H 2')]Cl and [Ru(NO)('S2N 2H ')]2 ('S2N 2H 2'2" = l,2-Ethanediamine-N,N'-bis(2-benzene thiolate)(2-)) Depending on the H" concentration and solvent, reaction o f [RuCl3(N O)(PPh3)2] with 
  Reference    Z. Naturforsch. 48b, 723 (1993); eingegangen am 8. März 1993 
  Published    1993 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0723.pdf 
 Identifier    ZNB-1993-48b-0723 
 Volume    48 
108Author    G. Udrun Stieglitz, Bernhard Neumüller, K. Urt DehnickeRequires cookie*
 Title    Synthese und KristaUstrukturen der 1 ^  
 Abstract    ^ -/.^ -ü iazap h osp h ole |Li(DME)2P(f-Bu)2C(Ph)NC(Ph)N| und P(f-Bu)2C(HPh)NC(Ph)N Syntheses and Crystal Structures o f the l,3,4-/l5cr4-Diazaphospholes [Li(DME)2P(/-Bu)2C(Ph)NC(Ph)N] and P(/-Bu)2C(HPh)NC(Ph)N l,3,4-/.5er4-D iazaphospholes, Synthesis, Crystal Structure [Li(DM E)2f>(/-B u)2C (Ph)NC (Ph)N has been prepared by the reaction o f Li(DM E)[P(/-Bu)2] with benzonitrile in 1,2-dimethoxyethan solution. The compound forms violet, moisture sensi­ tive crystals, which were characterized by an X-ray structure determination [Space group P2,/h, Z = 4. 3282 observed unique reflections, R = 0.082. Lattice dimensions at -4 0 °C: a = 851.0(5). b = 1238.0(3), c = 3029.2(4) pm, ß = 90.53(4)c]. The compound forms an ion pair, in which the lithium atom is coordinated by two oxygen atom s o f a chelating DM E molecule, by an oxygen atom o f a nonchelating D M E molecule, and by the nitrogen atom o f the planar diazaphosphole ring in 1-position. The phenyl groups are nearly coplanar with the diazaphos-phole ring.________________ P(f-Bu)2C (H Ph)N C(Ph)N is the product o f the reaction o f the lithium complex with meth­ anol. It forms colourless crystals [Space group P 2j/«, Z = 4, 2015 observed unique reflections, R = 0.068. Lattice dimensions at -8 0 °C: a = 1458.3(2), b -824.8(1), c = 1716.9(2) pm, ß = 105.37(9)°]. The molecules have planar 5H -diazaphosphole rings. 
  Reference    Z. Naturforsch. 48b, 730—7 (1993); eingegangen am 28. November 1992 
  Published    1993 
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 Identifier    ZNB-1993-48b-0730 
 Volume    48 
109Author    Requires cookie*
 Title    Darstellung und Reaktionen von zweikernigen Platin(II)-Komplexen; Einkristall-Röntgenstrukturanalyse eines Tetrakis(difluorphosphonato)-Palladat(II)-Komplexes  
  Reference    Z. Naturforsch. 48b, 737 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0737 
 Volume    48 
110Author    Requires cookie*
 Title    Schwingungsspektren und Normalkoordinatenanalyse der 35CI/37Cl-isotopierten Chloro-Iodo-Osmate(  
  Reference    Z. Naturforsch. 48b, 747 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0747 
 Volume    48 
111Author    Requires cookie*
 Title    Präparation und Kristallstrukturen von Rb8Inn , K8Tln und Rb8Tln sowie BandStrukturrechnungen zu K8Inn  
 Abstract    P rep aratio n and C rystal Structures o f R b gI n n , K gT ln , and R b 8T ln Band S tructure C alculations on K gI n M W olfgang Blase, G erh ard C ordier*, V olker M üller 
  Reference    Z. Naturforsch. 48b, 754 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0754 
 Volume    48 
112Author    DeguiW. Ang, H. S. Einz-Peter, Ann Chuchm, C. Lem Ens Von SonntagRequires cookie*
 Title    Phenylalanine: Its OH and S 0 4' -Induced Oxidation and Decarboxylation. A Pulse Radiolysis and Product Analysis Study  
 Abstract    ülheim a. d. R u h r Z. N aturforsch. 48b, 7 6 1 -7 7 0 (1993); received Ja n u a ry 19, 1993 A m ino Acid. Phenylalanine, Pulse R adiolysis, Peroxyl R adicals, Sulfate Radical Phenylam ine has been oxidized by radiolytically g enerated hydroxyl and sulfate radicals, the ensuing interm ediates an d th eir reactions have been studied by pulse radiolysis an d p ro d ­ uct analysis in the absence and presence o f oxid an ts such as Fe(C N)^" and 0 2. U p o n O H ra d i­ cal attack, hydroxycyclohexadienyl-type radicals are m ainly form ed while H -ab stractio n reac­ tions can be neglected. In the presence o f Fe(C N)^" these radicals are for the m ost p a rt oxi­ dized to the corresponding tyrosines (80%), except fo r the z/«o-O H -adduct radicals (= 2 0 %). It is concluded th at O H -ad d itio n is alm ost ran d o m , b u t w ith a slight avoidance o f the m eta­ position relative to the ortho-, para-an d /pso-positions. Oxygen adds reversibly to the O H -adduct radicals (k (= 1.8x 108 d m 3 m o l-1 s_l, k r = 5.4x 104 s"1). In this case, tyrosine fo r­ m ation occurs by H O ,'-elim ination. H ow ever, due to side reactions, tyrosine fo rm atio n only reaches 52% o f the O H radical yield. The tyrosine yield d ro p s to 10% in the absence o f an oxidant. U p o n S 0 4'--attack, decarb o x y latio n becom es a m ajo r process (33% o f S 0 4'~) alongside the production o f tyrosines (43%). H ere, w ith F e(C N)|~ as the o x id an t the fo rm atio n o f p -Tyr (18.5%) and ra-Tyr (16.5%) is preferred over o-T yr fo rm atio n (8.5%). It is believed th a t in analogy to oth er systems a radical cation is form ed im m ediately u p o n S 0 4'~-attack which either reacts with w ater u n d er the fo rm atio n o f hydroxycyclohexadienyl-type (" O H -a d d u c t") radicals, o r decarboxylates after in tram o lecu lar electron transfer. T he radical cation can also arise indirectly through H +-catalysed w ater elim ination from the O H -ad d u ct radicals. A t pH 2 and a dose rate o f 0.0046 G y s_1 C O , fo rm atio n m atches the O H radical yield w hen O H is the attacking radical. Below pH 2, G (C Ö 2) decreases w ith falling pH . This indicates the oc­ currence o f another, unim olecular, p ath w ay u n d er these conditions com peting effectively with decarboxylation. This ap p ears to be a relatively slow d e p ro to n a tio n reactio n o f the carboxyl-p ro to n ated phenylalanine radical catio n w hich gives rise to the benzyl-type radical. 
  Reference    Z. Naturforsch. 48b, 761 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0761 
 Volume    48 
113Author    U. Lrich, A. BramRequires cookie*
 Title    Thiocarbonyl Complexes of Rhenium. Part I. Synthesis, Characterization and X-Ray Structures of [Re(CS)(Me2PhP)3(Et2dtc)] and [Re(CS)(Et2dtc)3]  
  Reference    Z. Naturforsch. 48b, 771 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0771 
 Volume    48 
114Author    Requires cookie*
 Title    Tris(trimethylphosphine)cobalt(0) Compounds Containing Azaolefinic Ligands -Syntheses and Structures of Benzo[c]cinnoline and Phenylisocyanate Complexes  
  Reference    Z. Naturforsch. 48b, 785 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0785 
 Volume    48 
115Author    Requires cookie*
 Title    Sr3IMnN3l und Ba3[MnN3), die ersten Nitridomanganate(III): Trigonal-planare Anionen [MnHIN 3l6~  
  Reference    Z. Naturforsch. 48b, 794 (1993) 
  Published    1993 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0794.pdf 
 Identifier    ZNB-1993-48b-0794 
 Volume    48 
116Author    JörgN. Euhausen, ElisabethP. Otthoff, W. Olfgang, Trem El, Jürgen Ensling, PhilippG. ÜtlichRequires cookie*
 Title    TaFej 14Te3, A New Low-Dimensional Ternary Tantalum Telluride  
  Reference    Z. Naturforsch. 48b, 797 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0797 
 Volume    48 
117Author    A. Nna, Jan Eck Aa, Si-M Ei, S. Hana, Cyril Bowers, K. Arl, F. Olkers3Requires cookie*
 Title    Antagonists of LHRH with Histidine in the Priority Position 8  
  Reference    Z. Naturforsch. 48b, 812 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0812 
 Volume    48 
118Author    F.F A, El-L Atif3, M.M M AshalybRequires cookie*
 Title    Heterocycle Syntheses through Ternary Condensation of Terephthalaldehyde with Malononitrile and Some Nucleophiles  
 Abstract    ekheim er3, an d T. B. A bdel-A leem a 
  Reference    Z. Naturforsch. 48b, 817 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0817 
 Volume    48 
119Author    M. Athias, O. Senge, An, K. Evin, M. SmRequires cookie*
 Title    Molecular Structure of the Copper(II) Complex of 20-Methoxy-mesoporphyrin IX Dimethyl Ester - A Model for the Enol-Form of Oxophlorins  
  Reference    Z. Naturforsch. 48b, 821 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0821 
 Volume    48 
120Author    Requires cookie*
 Title    Liquid Crystalline Compounds in the Thiophene Series, Part 6 + Synthesis and Characterization of Azomethines and Vinylenes with Two Mesogenic Groups and Different Alkylene Spacer Lengths  
 Abstract    G erh ard K oßm ehl*, F ra n k D irk H oppe, B arbara Hirsch In stitu t für O rganische Chem ie der Freien U n iv ersität Berlin, T ak u straß e 3, D-W -1000 Berlin 33 
  Reference    Z. Naturforsch. 48b, 826 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0826 
 Volume    48 
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