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1985 (316)
1Author    Gerhard Cordier, Christoph Schwidetzky, Herbert SchäferRequires cookie*
 Title    Die Struktur des Ba 3 (AsS 4 ) 2 * 7 H 2 0 The Structure of Ba 3 (AsS 4 ) 2 * 7 H 2 0  
 Abstract    Barium Tetrathioarsenate(V) Heptahydrate, Crystal Structure Ba 3 (AsS 4) 2 -7 H 2 0 crystallizes in the monoclinic system, space group P2Je (No. 14) with a = 1275.8(4) pm,6 = 1282.9(4) pm, c = 1907.7(6) pm,/S = 139.5(1)°. In the structure there are isolated AsS 4 3 ~ tetrahedra with As—S-bond lengths between 216.3 and 217.8 pm. The Ba 2+ ions are coordinated by a total of 8 to 10 S 2 ~ ions and H 2 0 molecules. 
  Reference    (Z. Naturforsch. 40b, 1—4 [1985]; eingegangen am 21. September 1984) 
  Published    1985 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0001.pdf 
 Identifier    ZNB-1985-40b-0001 
 Volume    40 
2Author    Gerhard Cordier, Herbert Schäfer, Michael StelterRequires cookie*
 Title    Perantimonidogallate und -indate: Zur Kenntnis von Ca 5 Ga 2 Sb 6 , Ca 5 In 2 Sb 6 und Sr 5 In 2 Sb 6 Ca 5 Ga 2 Sb 6 , Ca 5 In 2 Sb 6 and Sr 5 In 2 Sb 6 : the First Perantimonidogallate and -indates  
 Abstract    The new compounds Ca 5 Ga 2 Sb 6 , Ca 5 In 2 Sb 6 and Sr 5 In 2 Sb 6 crystallize in the orthorhombic system (space group: Pbam, No. 55) with the lattice constants: 
  Reference    (Z. Naturforsch. 40b, 5—8 [1985]; eingegangen am 26. Oktober 1984) 
  Published    1985 
  Keywords    Perantimonidogallate, Perantimonidoindates, Cyrstal Structure 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0005.pdf 
 Identifier    ZNB-1985-40b-0005 
 Volume    40 
3Author    Gerhard Beber, Jürgen Hanich, Kurt DehnickeRequires cookie*
 Title    Reaktionen von Yanadiumtetrachlorid mit Trithiazylchlorid Reactions of Vanadium Tetrachloride with Trithiazylchloride Vanadiumtrichloride-Thiazylchoride Adduct, Tetrachlorovanadate(III)-S 2 N 2  
  Reference    (Z. Naturforsch. 40b, 9—12 [1985]; eingegangen am 24. September 1984) 
  Published    1985 
  Keywords    Adduct, Preparation, IR Spectra 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0009.pdf 
 Identifier    ZNB-1985-40b-0009 
 Volume    40 
4Author    Kay Jansen, Kurt Dehnicke, Dieter FenskeRequires cookie*
 Title    Anionische Komplexe [Mo2(0 2 CPh) 4 X 2 f ö mit X = N 3 , Cl, Br. Die Kristallstruktur von (PPh^Moz^CPh^Cy -2CH 2 Cl2 Anionic Complexes [Mo 2 (0 2 C-Ph) 4 X 2 ] 2e with X = N 3 , Cl, Br. The Crystal Structure of (PPh 4 ) 2 [Mo 2 (0 2 C-Ph) 4 Cl 2 ] * 2CH 2 C1 2  
 Abstract    Anionic Complexes, Crystal Structure The syntheses and IR spectra of the complexes [Mo2(0 2 C-Ph)4X 2 ] 2e with X = N 3 , Cl, Br and the counter ion PPh 4 ® are reported. The azido and the bromo complexes are obtained from a solution of [Mo 2 (0 2 CPh) 4 ] with PPh 4 N 3 in pyridine or by reaction with PPh 4 Br in CH 2 Br 2 , respec-tively. When (PPh 4) 2 [Mo 2 (0 2 CPh) 4 (N 3) 2 ] is dissolved in CH 2 C1 2 , nitrogen is evolved and the complex with X = Cl is obtained. The crystal structure of (PPh 4) 2 [Mo 2 (0 2 CPh) 4 Cl 2 ] -2CH 2 C1 2 was determined from X-ray diffraction data (5676 observed independent reflexions, R = 0.042). It crystallizes in the monoclinic space group P2Jn with four formula units per unit cell; the lattice constants are a = 1549, b = 1400, c = 1648 pm, ß = 94.6°. The centrosymmetric [Mo 2 (0 2 CPh) 4 Cl 2 ] 2e ion has a rather short Mo—Mo bond of 213 pm, whereas the MoCl bonds are very long (288 pm). 
  Reference    (Z. Naturforsch. 40b, 13—18 [1985]; eingegangen am 28. September 1984) 
  Published    1985 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0013.pdf 
 Identifier    ZNB-1985-40b-0013 
 Volume    40 
5Author    W. S. Sheldrick, J. KaubRequires cookie*
 Title    Ein isoliertes cyclisches Thioarsenat(III)-Anion. Darstellung und Struktur von (enH 2 ) 3 (As 3 S 6 ) 2 * 6en An Isolated Cyclic Thioarsenate(III) Anion. Preparation and Structure of (enH 2 ) 3 (As 3 S 6 ) 2 -6en  
 Abstract    Thioarsenate(III) Anion As 3 S 6 3 ~, Six-Membered As 3 S 3 -Ring, X-Ray The thioarsenate(III) (enH 2) 3 (As 3 S 6) 2 -6en 1 (en = ethylenediamine) has been prepared by the reaction of ethylenediamine with As 2 S 3 and its structure established by X-ray structural analysis. 1 contains discrete cyclic As 3 S 6 3 ~ anions with a six-membered As 3 S 3 -ring in the chair conforma-tion. The As atoms display a ^-tetrahedral coordination. 
  Reference    (Z. Naturforsch. 40b, 19—21 [1985]; eingegangen am 25. September 1984) 
  Published    1985 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0019.pdf 
 Identifier    ZNB-1985-40b-0019 
 Volume    40 
6Author    Hidenari Inoue, Masahiro Sasagawa, Ekkehard FluckRequires cookie*
 Title    P-NMR-und ?7 Fe-Mößbauer-spektroskopische Untersuchungen an Pentacyano(phosphan oder phosphit)ferraten(II) 31 P NMR and 57 Fe Mössbauer Spectroscopic Studies on Pentacyano(phosphane or phosphite)ferrates(II)  
 Abstract    31 P NMR Spectra, 57 Fe Mössbauer Spectra, Pentacyano(phosphine)ferrate(II), Pentacyano(phosphite)ferrate(II) The 3I P{'H}NMR spectra for a series of pentacyanoferrates(II) of the type Na 3 [Fe(CN) 5 L] (L = phosphine or phosphite) have been measured. A low field chemical shift range of 48.1 — 88.7 ppm for phosphine complexes and of 32.5 — 48.4 ppm for phosphite complexes is ob-served when one compares free vs. coordinated ligands. The correlation between chemical shifts in the 31 P NMR spectra and isomeric shifts in the Mössbauer spectra is investigated and discussed. 
  Reference    (Z. Naturforsch. 40b, 22—25 [1985]; eingegangen am 12. Oktober 1984) 
  Published    1985 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0022.pdf 
 Identifier    ZNB-1985-40b-0022 
 Volume    40 
7Author    Rüdiger Kniep, Wilfried WelzelRequires cookie*
 Title    Phasenbeziehungen und intermediäre Verbindungen in Systemen GaX 3 —Ga 2 S 3 und InX 3 —In 2 S 3 (X = CI, Br, I) Phase Relations and Intermediate Compounds in Systems GaX 3 —Ga 2 S 3 and InX 3 —In 2 S 3 (X = CI, Br, I)  
 Abstract    Thiohalides of Gallium and Indium. Phase Relations, Structural Relations The systems GaX 3 -Ga 2 S 3 and InX 3 -In 2 S 3 (X = CI, Br, I) are quasi-binary and contain the intermediate phases GaSX and InSX with incongruent melting behaviour. Stability regions of GaSCl and GaSBr at elevated temperatures are shifted towards the respective binary halides and include compositions Ga 9 S 8 X n which in an earlier work were reported as separate crystalline phases. InSCl and InSBr (CdCl 2 -type structure) also show a significant phase width towards the respective binary halides, but with the maximum melting temperature remaining at stoichiometric compositions. Cell parameters and symmetry of InSI are related to InSel. but do not confirm the proposed isotypic relationship. 
  Reference    (Z. Naturforsch. 40b, 26—31 [1985]; eingegangen am 19. August 1984) 
  Published    1985 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0026.pdf 
 Identifier    ZNB-1985-40b-0026 
 Volume    40 
8Author    Alois Haas, Wolfgang Wanzke, Nathan WelcmanRequires cookie*
 Title    Hydrolyse von Per(fluorchlor)methylsulfenylchloriden: Isolierung und Charakterisierung stabiler Zwischenstufen Hydrolysis of Per(fluorochloro)methylsulfenylchlorides: Isolation and Characterization of Stable Intermediates  
 Abstract    Acidic Hydrolysis of CF 3 _"C1"SC1, Preparation of CF3_ n Cl"SS(0)! 2 CF 3 _"C1", Reaction Schemes, Per(fluorochloro)methylsulfenylchlorides Hydrolysis of CF 3 _"C1"SC1 with water yields the thiosulfinates CF 3 _ n Cl"SS(0)CF 3 _"Cl" and thiosulfonates CF 3 _"C1"SS0 2 CF 3 _"C1" as stable intermediates. They were synthesized on a pre-parative scale by special reactions and characterized. A new mechanism, based upon additional reactions of the isolated products, is discussed and extended to the reaction of chlorine with water. 
  Reference    (Z. Naturforsch. 40b, 32—38 [1985]; eingegangen am 17. September/8. Oktober 1984) 
  Published    1985 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0032.pdf 
 Identifier    ZNB-1985-40b-0032 
 Volume    40 
9Author    Winfried Hinrichs, Jürgen Kopf, Klaus-Wilhelm Stender, Günter KlarRequires cookie*
 Title    Selbststapelnde Systeme, I 4 a Compound with Radical Cations and Polyiodide Chains  
 Abstract    ,4' ,5,5'-Tetramethoxy-2,2'-dithiobiphenyl-Iod (6/7), eine Verbindung mit Radikalkationen und Polyiodidketten Selfstacking Systems, I 4,4',5,5'-Tetramethoxy-2,2'-dithiobiphenyl-Iodine (6/7), 
  Reference    (Z. Naturforsch. 40b, 39—44 [1985]; eingegangen am 20. September 1984) 
  Published    1985 
  Keywords    4, 4', 5, 5'-Tetramethoxy-2, 2'-dithiobiphenyl-Iodine (6/7), Molecular and Crystal Structure, Self-stacking Systems, Polyiodide Chains 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0039.pdf 
 Identifier    ZNB-1985-40b-0039 
 Volume    40 
10Author    Axel Parlow, Hans HartlRequires cookie*
 Title    Synthese und Strukturuntersuchung von Polyhalogeniden im System Iod/Brom Syntheses and Structure Analyses of Polyhalides in the System Iodine/Bromine  
 Abstract    2,2'-Bipyridylium-oxonium-bis(iododibromide), 2,2'-Bipyridyliumdiiodotribromide, 2,2'-Bipyridylium-pentaiododibromide, Crystal Structure Several polyhalide anions containing iodine and bromine have been synthesized with 2,2'-bipyridylium (BPH +) as the cation. The crystal structures of three compounds have been investi-gated by X-ray crystal structure analyses. BPH + (H 3 0) + (IBr 2) 2 -(PI, a = 780.0(3), b = 815.4(3), c = 1547.9(6) pm, a = 75.59(7), ß = 82.28(8), y = 88.15(8)°, R = 6.5%) contains two independ-ent, nearly linear, asymmetric IBr 2 " groups. In BPH + I 2 Br 3 -(P2,/c, a = 1269.1(6), b = 673.0(4), c = 2047.4(8) pm, ß = 112.39(9)°, R = 6.3%), the anion is V-shaped like other pentahalide anions. It can be characterized as consisting of two IBr molecules linked to a bromide anion with the longer I-Br bonds at the central atom. The polyhalide anions in BPH + 2 [I 5 Br 2 ~] (P2j/m, a = 435.1(2), b = 1710.6(7), c = 1349.0(6) pm, ß = 97.56(9)°, R = 15.5%) form infinite zigzag layers. They are built up by IBr 2 ~ anions which are connected by iodine molecules. The cations are enclosed in columnar cavities within these layers. 
  Reference    (Z. Naturforsch. 40b, 45—52 [1985]; eingegangen am 20. August 1984) 
  Published    1985 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0045.pdf 
 Identifier    ZNB-1985-40b-0045 
 Volume    40 
11Author    Rolf Minkwitz, Klaus Jänichen, Herbert Prenzel, Volker WölfelRequires cookie*
 Title    Beiträge zur Chemie der Schwefelhalogenide, 6 [1] Untersuchungen an Trichlorsulfonium(IV)-Salzen Contributions to the Chemistry of Sulfur Halides, 6 [1] Investigations on Trichlorosulfonium(IV) Salts  
 Abstract    The crystal structure of SCl 3 + AsF 6 ~ is reported. The mean S-Cl stretching frequency v of the SC1 3 + cations, weighted according to the degree of degeneration, in the different SC1 3 + X~ salts is directly proportional to the mean S-Cl distance r scl , the force constant f sci and the sulfur.. .anion distance (C1 3 S + .. .X"). That SC1 3 + C1" should be isostructural with PC1 4 ~, the large variation in the S-Cl stretching frequencies in the SC1 3 + X~ salts is due to cation-anion interaction forces. 
  Reference    (Z. Naturforsch. 40b, 53—56 [1985]; eingegangen am 4. Juli/10. Oktober 1984) 
  Published    1985 
  Keywords    Crystal Structure, Bonding and Force Constants, Sulfur Halides 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0053.pdf 
 Identifier    ZNB-1985-40b-0053 
 Volume    40 
12Author    R. Martin, H. J. Keller, B. MüllerRequires cookie*
 Title    Structure of Dibromo(l,2-diaminoethane)palladium(IY)-bis(l,2-diaminoethane)- palladium(II) Tetrakisperchlorate, [Pd(en) 2 Br 2 ][Pd(en)2](C104)4  
 Abstract    Linear Mixed-Valence Palladium(II, IV) Chains Orthorhombic [Pd(C,H 8 N 2),Br 2 ][Pd(C 2 H 8 N 2)][C10 4 ] 4 , C 8 H 32 Br 2 Cl 4 N 8 0 I6 Pd 2 , M r = 890.42, crystallizes in space group Iba2, a = 9.651(2), b = 13.951(8), c -10.771(2) Ä, Z = 2, V = 1412.80 Ä 3 , d c = 2.05 gem -3 , R = 0.0564 for 1545 unique reflections. Data collection: MoK a , A = 0.71069 Ä, room temperature. The structure is a typical Wolffram's Salt Analogue (WSA) with infinite stacks of planar [Pd(en) 2 ] 2+,4+ complex cations bridged by bromides. The ligands are three-dimensionally ordered. Intra-chain and inter-chain hydrogen bridges link the ligands with the Perchlorate counter ions which occupy statistically two different orientations. Diffuse sheets appear together with Bragg reflections for 1 odd layers indicating a thermally activated motion of the bromides in chain direction. This model was confirmed with temperature dependent Weissenberg work. 
  Reference    (Z. Naturforsch. 40b, 57—60 [1985]; received August 23/October 11 1984) 
  Published    1985 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0057.pdf 
 Identifier    ZNB-1985-40b-0057 
 Volume    40 
13Author    Wolfgang KaimRequires cookie*
 Title    Zur Reaktion aromatischer Phosphanderivate mit Elektronen, III [1, 2] Phosphan-Borane, -Alane und -Gallane On the Reaction of Aromatic Phosphane Derivatives with Electrons, III [1, 2] Phosphane-Boranes, -Alanes, and -Gallanes  
 Abstract    The 1:2 molecular complexes formed from l,4-phenylenebis(dimethylphosphane) and boranes, trialkyl-aluminum and -gallium have been reduced by potassium in THF in the presence of a K + -complexing crown ether. The bis(borane) complex anion radicals proved to be quite persistent, whereas corresponding aluminum radical complexes could only be observed below 240 K. The bis(trimethylgallium) complex gave gallium metal on reduction with potassium. An ESR spectro-scopic comparison with the anion radicals of the free ligand, of corresponding chalcogenides, imines and phosphonium salts demonstrates negligible effects of P-complexation on the JI spin distribution but high sensitivity of the 31 P coupling constant towards coordination of electrophiles at the basic P(III) centers. 
  Reference    (Z. Naturforsch. 40b, 61—66 [1985]; eingegangen am 1. Oktober 1984) 
  Published    1985 
  Keywords    Molecular Complexes, Reduction, Anion Radicals, ESR Spectra 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0061.pdf 
 Identifier    ZNB-1985-40b-0061 
 Volume    40 
14Author    Manfred Regitz, Klaus Urgast, Gerhard MaasRequires cookie*
 Title    Phosphorverbindungen ungewöhnlicher Koordination, 3 [1] Vergleich des Cycloadditonsverhaltens von Diphenylketen und Triphenylphosphen Phosphorus Compounds with Unusual Coordination, 3 [1] Comparison of the Cycloaddition Behaviour of Diphenylketene and Triphenylphosphene  
 Abstract    Triphenylphosphene (3b), generated thermally or photochemically from lb, undergoes olefi-nation reaction with 4.5-benzotropone (6) to yield l-(diphenylmethylen)-4.5-benzocyclohepta-triene (9); the oxaphosphetane 7b is assumed to be the intermediate of this reaction. In an analogous way, 4-pyrone (15) is transformed into 4-(diphenylmethylen)pyrane (16). Correspon-ding olefination behaviour is observed in the reactions of 6 and 15 with diphenylketene. In the reaction of tetracyclone (20) with diphenylketene (3a), the olefination sequence leads to the formation of (diphenylmethylen)tetraphenylcyclopentadiene (21) via betain 22a and the cycloadduct 23a. The spirocyclic reaction product 26a probably arises from the same betain — like intermediate (22 a —> 25 a —> 26 a). The analogy in triphenylphosphene reactivity towards 20 is restricted to the [2+8]-cycloaddition step (formation of 26b). 
  Reference    (Z. Naturforsch. 40b, 67—76 [1985]; eingegangen am 19. Juli 1984) 
  Published    1985 
  Keywords    Diphenylketene, Triphenylphosphene, Cycloaddition with CO-Compounds, Crystal Structure 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0067.pdf 
 Identifier    ZNB-1985-40b-0067 
 Volume    40 
15Author    Ernst Guggolz, Klaus Layer, Franz Oberdorfer, Manfred ZieglerRequires cookie*
 Title    Tetrahydrothiophen als Komplexligand; Darstellung und Charakterisierung von Spezies der  
 Abstract    Zusammensetzung M 2 (CO) 9 (C 4 H 8 S) (M = Mn, Re) und Mn 2 (CO) 8 (C 4 H 8 S). Röntgenstrukturanalysen von Mn 2 (CO) 9 (C 4 H 8 S) und Mn 2 (CO) 8 (C 4 H 8 S) Tetrahydrothiophene as a Complex Ligand; Synthesis and Characterization of Species of Composition M 2 (CO) 9 (C 4 H 8 S) (M = Mn, Re) and Mn 2 (CO) 8 (C 4 H 8 S). X-Ray Structures of Mn 2 (CO) 9 (C 4 H 8 S) and Mn 2 (CO) 8 (C 4 H 8 S) Synthesis, X-Ray, Decacarbonyl Derivatives Heating of the decacarbonyls M 2 (CO) 10 (M = Mn, Re) in tetrahydrothiophene under reflux gave the substitution products M 2 (CO) 9 (C 4 H 8 S) (M = Mn, Re) and Mn 2 (CO) 8 (C 4 H 8 S), respec-tively. In the former an equatorial CO group has been substituted, while in the latter the tetra-hydrothiophene ligand bridges symmetrically two Mn —Mn bonded Mn(CO) 4 units. The manga-nese compounds (monoclinic, P2!/c) were characterized by means of X-Ray structure analysis. Das Ligandenverhalten von Tetrahydrothiophen (THT; 1) ist erstmals 1961 am Beispiel des 
  Reference    (Z. Naturforsch. 40b, 77—84 [1985]; eingegangen am 2. August/6. November 1984) 
  Published    1985 
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 Identifier    ZNB-1985-40b-0077 
 Volume    40 
16Author    Klaus Blechschmitt, Ernst Guggolz, ManfredL. ZieglerRequires cookie*
 Title    Reaktiviät von Metall—Metall-Mehrfachbindungen, II [1] Nukleophile Addition von Methylensulfiden an [CpMo(CO)  
 Abstract    2 ]2 unter Bildung von Cp(CO) 2 Mo(|*-S(CH 2)")Mo(CO) 2 Cp-Spezies; Röntgenstrukturanalyse von Cp(CO) 2 Mo(i n-S(CH 2) 6)Mo(CO) 2 Cp Reactivity of Metal-Metal Multiple Bonds, II [1] Nucleophilic Addition of Methylenesulfides to [CpMo(CO) 2 ]2 with Formation of Cp(CO) 2 Mo(M-S(CH 2)") Mo(CO) 2 Cp Spezies; X-Ray Structure Analysis of Cp(CO) 2 Mo(w-S(CH 2) 6)Mo(CO) 2 Cp The triply Mo-Mo bonded molecule [Cp(CO) 2 Mo] 2 was reacted with the cyclic sulfides S(CH 2)" (n = 4-6). The species Cp(CO) 2 Mo(w-S(CH 2)")Mo(CO) 2 Cp were isolated and charac-terized by their analytical and spectroscopic data. X-Ray structure analysis of the compound Cp(CO) 2 Mo(w-S(CH 2) 6)Mo(CO) 2 Cp proved the cyclic sulfide to act as a bridging ligand. 
  Reference    (Z. Naturforsch. 40b, 85—89 [1985]; eingegangen am 2. August/6. November 1984) 
  Published    1985 
  Keywords    Synthesis, Metal-Metal Multiple Bonds, X-Ray 
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 Identifier    ZNB-1985-40b-0085 
 Volume    40 
17Author    Gerhard Maas, Berndt SingerRequires cookie*
 Title    Dikationether  
 Abstract    , 6 [1] Spektroskopische Vergleiche von 9,9'-Oxy-bis(acridinium)-und 9,9'-Thio-bis(acridinium)-Salzen mit anderen 9-substituierten Acridinium-Ionen Dication Ethers, 6 [1] Spectroscopic Comparisons of 9,9'-Oxy-bis(acridinium)-and 9,9'-Thio-bis(acridinium) Salts with Other 9-Substituted Acridinium Ions 
  Reference    (Z. Naturforsch. 40b, 90—99 [1985]; eingegangen am 18. Juli 1984) 
  Published    1985 
  Keywords    Bis(acridinium) Ethers, 9-Substituted Acridinium Ions, 13 C NMR Spectra, UV Spectra, 'H NMR Spectra 
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 Identifier    ZNB-1985-40b-0090 
 Volume    40 
18Author    A. HengleinRequires cookie*
 Title    Sonolysis of Carbon Dioxide, Nitrous Oxide and Methane in Aqueous Solution  
 Abstract    Water was irradiated with ultrasonic waves under an argon atmosphere which contained small amounts of carbon dioxide, nitrous oxide or methane. The yield of the products was measured as a function of the composition of the gas atmosphere. Maximum yields were observed at a few per cent of the added polyatomic gas. No chemical effects occurred in the irradiation under an atmosphere of pure C0 2 , N 2 0 or CH 4 . It is concluded that the gas mixture in the tiny gas bubbles, in which the chemical effects are brought about, is not in Henry's equilibrium with the aqueous gas solution. The main product of the sonolysis of C0 2 is CO, a small amount of formic acid also being formed. The sonolysis is explained by both the attack of H atoms from the sonolysis of water and direct decomposition of C0 2 due to the high temperatures existing in compressed gas bubbles. The main products of the sonolysis of N 2 0 are nitrogen, nitrite and nitrate. N 2 0 enhances the rate of various oxidations such as that of iodide, nitrite and propanol-2. In the methane containing solution, a lot of hydrogen is produced, the main oxidation products being ethane, ethylene, C 3 -and C 4 -hydrocarbons and carbon monoxide. A mechanism is postulated which involves both the attack on methane by radicals from the decomposition of water and thermal decomposition of methane. The local radical concentrations are so high that a methane molecule may undergo multiple radical attack. The similarity between sonolytic reactions and reactions occurring in flames is emphasized. 
  Reference    (Z. Naturforsch. 40b, 100—107 [1985]; received August 14 1984.) 
  Published    1985 
  Keywords    Ultrasonic Waves, Carbon Dioxide, Nitrous Oxide, Methane, Free Radicals 
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 Identifier    ZNB-1985-40b-0100 
 Volume    40 
19Author    Grazyna WenskaRequires cookie*
 Title    The Photoreactions of Thymine with Hypoxanthine and Imidazole  
 Abstract    Photocycloaddition, Thymine, Azetidine, Cyclobutane Adducts Photochemical reactions of thymine linked to hypoxanthine or imidazole by a trimethylene chain were studied in aqueous solution. Irradiation (A = 254 nm) of thymine-hypoxanthine pair yielded two internal cycloadducts with azetidine and cyclobutane part structures. Sensitization and quenching experiments suggested that the excited singlet was the reactive state in the photo-cycloaddition reactions. Only cyclobutanes were isolated from irradiated (A = 290 nm) solutions of thymine-imidazole pairs. Photocycloadditions were reversible upon irradiation at A = 254 nm. 
  Reference    (Z. Naturforsch. 40b, 108—114 [1985]; received May 15 1984) 
  Published    1985 
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 Identifier    ZNB-1985-40b-0108 
 Volume    40 
20Author    Karl-Hans OnganiaRequires cookie*
 Title    Synthesis of 3,4-Benzo-l-oxacephem  
 Abstract    l-(2-/-Butyldimethylsilyloxymethylphenyl)-4-methylthio-2-azetidinone, 4-Chloro-l-(2-hydroxymethylphenyl)-2-azetidinone, l-(2-Hydroxymethylphenyl)-4-methylthio-2-azetidinone, Mercuric Chloride, Silver Tetrafluoroborate The thioformimidate 4, which may be obtained by S-methylation of 5 reacts with chloroacetyl chloride/triethylamine to yield the trans-2-azetidinone 7. 7 is dehalogenated to 8. Removal of the protective group leads to 9, which undergoes ring closure by the action with mercuric chloride/ mercuric oxide. Chlorolysis of 8 and the subsequent reaction with hydrofluoric acid/acetonitrile yields 12. The treatment of 12 with silver tetrafluoroborate/silver oxide gives also the title com-pound 10. 
  Reference    (Z. Naturforsch. 40b, 115—119 [1985]; eingegangen am 12. Juli/22. Oktober 1984) 
  Published    1985 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0115.pdf 
 Identifier    ZNB-1985-40b-0115 
 Volume    40 
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