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1979 (382)
61Author    OttoS. Wolfbeis, Hans JunekRequires cookie*
 Title    Formylation of CH2-acidic Compounds via the Anilinomethylene Derivatives  
  Reference    Z. Naturforsch. 34b, 283—289 (1979); received October 11 1978 
  Published    1979 
  Keywords    Formylation, Acylation, Active Methylenes, /?, /?-Diacylenamines, /3, /3-Diacylenoles 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0283.pdf 
 Identifier    ZNB-1979-34b-0283 
 Volume    34 
62Author    Herbert Meier, Ahmed Issa, Ursula MerkleRequires cookie*
 Title    5aH  
 Abstract    A supposed benzoxete is determined as a complex polycyclic system: cis,cis,cis-5 aH,10 aH,15 aH-tribenzo[b,f,j][l,4,7]trioxa[9 b]azaplienalene. The structure elucida-tion is performed by spectroscopycal methods (IR, *H NMR, 13 C NMR and mass spec-troscopy) and by degradation reactions in an acidic or an alkaline medium. 
  Reference    Z. Naturforsch. 34b, 290—296 (1979); eingegangen am 28. September 1978 
  Published    1979 
  Keywords    lOaH, 15aH-Tribenzo[b, f, j][l, 4, 7]trioxa[9b]azaphenalenes -Supposed Benzoxetes 3-Hydroxyaldehydes, Benzoxetes, Benzoxazines 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0290.pdf 
 Identifier    ZNB-1979-34b-0290 
 Volume    34 
63Author    F. I. Abdel-Hay, M. A. Omara, A. A. El-Barbary, M. El-BadawiRequires cookie*
 Title    Organophosphorus Compounds of Expected Biological Activity, Part II* Preparation of Thiourea Derivatives and N-Aryl-phosphorothiomonoamidates  
 Abstract    The examples of cyclodiphosphazanes so far studied do not contain any nuclei of biological interest [1]. In the present investigation we aimed to introduce ethyl p-amino-benzoate, 2-aminopyridine residues in the phosphazane molecule. For this purpose phos-phorus pentachloride was treated with ethyl p-aminobenzoate, p-anisidine, 2-amino-pyridine and 5-aminoquinoline to give l,3-di-j9-ethoxycarbonylphenyl-, l,3-di-j9-methoxy-phenyl-, l,3-di-2-pyridyl-and l,3-di-5-quinolinyl-2,2,2,4,4,4-hexachlorocyclo-diphos-phazane (la-d), respectively. The compounds la-d were treated with potassium thio-cyanate in acetone. The oily products formed were then treated with p-anisidine, ethyl-p-aminobenzoate and 2-aminopyridine whereupon solid products (2a-h) were obtained. The reaction probably takes place according to the following mechanism [2]. la: b: c: d: Ar 1 Ar C2H5OOCC6H4-(p) CH3OC6H4-(p) C5H4N-(2) C9H6N-(5) Ar Cl /N Cl ci >0< ci SCN NCS 2a: b: c: 
  Reference    Z. Naturforsch. 34b, 297—299 (1979); received October 16 1978 
  Published    1979 
  Keywords    Organophosphorus Compounds, Thiourea Derivatives, Biological Activity 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0297.pdf 
 Identifier    ZNB-1979-34b-0297 
 Volume    34 
64Author    B. Johannes, H. Brzezinka, H. BudzikiewiczRequires cookie*
 Title    Mass Spectroscopic Fragmentation Reactions, XXI [1] Factors Influencing the Loss of Xylene and Toluene from the Polyene Chain of Carotenoids  
 Abstract    By examining suitably substituted analogs of carotenoids the steric and electronic influences governing the elimination of xylene and toluene from the polyene chain have been clarified. 
  Reference    Z. Naturforsch. 34b, 300—305 (1979); received November 7 1978 
  Published    1979 
  Keywords    MS, Analysis, Carotenoids, Polyene Chain 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0300.pdf 
 Identifier    ZNB-1979-34b-0300 
 Volume    34 
65Author    Friedhelm Lötz, Udo Kraatz, Friedhelm KörteRequires cookie*
 Title    Synthese Pyridin-analoger Tetrahydrocannabinol Synthesis of Pyridine-analogous Tetrahydrocannabinols  
 Abstract    Starting from 4-methylpyridine Si 3-B/ZR-zl 8 -tetrahydrocannabinol-analogous (2d) was prepared. The reaction sequence also includes the first synthesis of a 6H-benzo(4,5)-pyrano(2,3-c)-pyridin-6-on, a novel ring-system. The proposed structures were supported by spectroscopic data (X H NMR, IR, MS). 
  Reference    Z. Naturforsch. 34b, 306—312 (1979); eingegangen am 7. September 1978 
  Published    1979 
  Keywords    Aza-Cannabinoids, Benzopyrano Pyridines, Structural Identification, Synthesis 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0306.pdf 
 Identifier    ZNB-1979-34b-0306 
 Volume    34 
66Author    W. Neuenhaus, H. Budzikiewicz, H. Korth, G. PulvererRequires cookie*
 Title    Bakterieninhaltsstoffe, III [1] 3-Alkyl-tetrahydrochinolinderivate aus Pseudomonas Bacterial Constituents, III [1] 3-Alkyl-tetrahydroquinoline Derivatives from Pseudomonas  
  Reference    Z. Naturforsch. 34b, 313—315 (1979); eingegangen am 18. September 1978 
  Published    1979 
  Keywords    Bacterial Constituents, Pseudomonas, Iron Defficiency Growth, Fluorescent Compounds, 3-Alkyl-3-hydroxy-2, 4-dioxo-l, 2, 3, 4-tetrahydroquinolines 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0313.pdf 
 Identifier    ZNB-1979-34b-0313 
 Volume    34 
67Author    Bernd Kohne, Klaus Praefcke, Helmut SchwarzRequires cookie*
 Title    CO2 Elimination from Gaseous Radical Cations of Thiol Esters: Intramolecular Oxygen Transfer of (C +3 /C +3 )-Type  
 Abstract    It is shown for the first time that under electron impact conditions an intramolecular oxygen transfer is possible from the thiol ester funtion onto the carbon atom of a second thiol ester group. The reaction sequence is terminated by CO2 elimination and the proposed structure of the resulting product ion is based on 13 carbon labelling experiments and collisional activation mass spectrometry. In addition, some unusual examples of ring contraction processes in the gas phase are reported. Eliminierungen kleiner Neutralteile unter Einbe-ziehung von Wasserstoff-Umlagerungen sind wohl-bekannte Reaktionen ionischer Systeme, die zweck-mäßig im Massenspektrometer analysiert werden können [3]. In die gleiche Kategorie gehören -formal besehen -auch die viel seltener studierten Redoxprozesse [4], unter denen in jüngster Zeit intramolekulare Sauerstoff-Übertragungen [4-10] besonderes Interesse gefunden haben. Bei der Mehr-zahl der Sauerstoff-Wanderungen im Massenspektro-orr 5 ^ (1 c—s CH, CH, CH, meter fungiert eine N02-Gruppe [6-10] als Sauer-stoff-Donator, während als Acceptor Atome ver-schiedenartigster chemischer Natur, Oxidations-stufen und Sauerstoffaffinitäten möglich sind [4-10]. Einen bemerkenswerten Sonderfall stellt das 
  Reference    Z. Naturforsch. 34b, 316—320 (1979); eingegangen am 14. August 1978 
  Published    1979 
  Keywords    Sulphur Compounds, Thiol Esters, Collisional Activation, Oxygen Transfer, Ring Contraction 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0316.pdf 
 Identifier    ZNB-1979-34b-0316 
 Volume    34 
68Author    HarryF. Widing, LeonardS. LevittRequires cookie*
 Title    The Alkyl Inductive Effect, II Theoretical Calculation of Inductive Parameters  
 Abstract    Alkyl Inductive Effect, Inductive Substituent Constants of Alkyl Groups Three models of alkyl groups, "derealization", "through-the-bond", and "electric field" models, are presented, all of which enable the calculation of <7I(R) from first prin-ciples, and excellent agreement is demonstrated for the calculated and experimental values of <7i(R). For the "derealization" model it is found that —<XI(R) = 0.0455 + 0.0232(1—1/n), where n is the number of C atoms in an w-alkyl group, and for an infinite C-chain R group, CRI(R00) is —0.0687, identical to the value found by a different method in Part I of this series. The "through-the-bond" model gives —FFI(R) = —0.0559 + ii 0.1015 2 Ci/(2i—l) 2 , where Ci is the number of C-atoms in the i th position from X in RX; 1 n and for the "electric field" model, we obtain —CT^R) = 0.0463 + 0.0102 Z Cidr 2 , where di 2 is the calculated distance from Ci to Cn in the most probable conformation of the R-group. It is concluded that Taft's (TI(R) values have a real significance whether or not the physical and chemical effects of alkyl substitution reside ultimately in an internal induction mechanism, or in alkyl group polarization by charged centers in the molecule, or a com-bination of the two. 
  Reference    Z. Naturforsch. 34b, 321—326 (1979); received August 29 1978 
  Published    1979 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0321.pdf 
 Identifier    ZNB-1979-34b-0321 
 Volume    34 
69Author    Heinz-Peter Schuchmann, Heinz Bandmann, Clemens Von SonntagRequires cookie*
 Title    The 185 nm Photolysis of 1,4-Dioxane in the Liquid Phase  
 Abstract    The main products in the 185 nm photolysis of neat 1,4-dioxane are formaldehyde (0 = 0.25), glycol monovinyl ether (0.17), and ethylene (0.15). Some hydrogen (0.04), carbon monoxide (0.01), acetaldehyde (0.03), oxetane (0.04), and bidioxanyl (0.01) are also formed. On N20-saturation, the quantum yields of these products are diminished by about 30%, and N2 (0.59) and hydroxydioxane (0.4) become the main products. They are thought to be formed in the reaction sequence hv dioxane > • dioxane* dioxane* + N20 > • dioxane + N2 + O O + dioxane > • hydroxydioxane In aqueous dioxane, photoionisation is possible due to a greater lowering of the ionisa-tion threshold. In dioxane/water 20:80 the main products are H2 (0.50) and bidioxanyl (0.45), most likely formed in consequence of (dioxane)aq (dioxane)aq + eäq (dioxane)Jq • (dioxane-H)-+ H+ eäq + H+ > H-H-+ dioxane >-H2 + (dioxane-H)-2 (dioxane-H)- • bidioxanyl 
  Reference    Z. Naturforsch. 34b, 327—332 (1979); received October 6 1978 
  Published    1979 
  Keywords    Photolysis, 1, 4-Dioxane, Photoionisation, Energy Transfer, Quantum Yields 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0327.pdf 
 Identifier    ZNB-1979-34b-0327 
 Volume    34 
70Author    Giorgio Malesani, Ugo Quintily, Gianfranco ChiarelottoRequires cookie*
 Title    345 G. Malesani et al. * Keto-enol Tautomerism in 4,7-Dioxo-4,5,6,7-tetrahydroindoles  
 Abstract    The tautomeric equilibria of 4,7-dioxo-4,5,6,7-tetrahydroindoles have been investigated by nuclear magnetic resonance spectroscopy. Proton chemical shift measurements have been made for a series of alkyl or arylindole derivatives, and equilibrium constants ([enol]/[keto]) have been determined. The effect of solvent on the enol-keto equilibria has been studied. 
  Reference    Z. Naturforsch. 34b, 333—338 (1979); received September 8 1978 
  Published    1979 
  Keywords    Keto-enol Tautomerism, 4, 7-Dioxo-4, 5, 6, 7-tetrahydroindoles, 4, 7-Dihydroxyindole Derivatives 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0333.pdf 
 Identifier    ZNB-1979-34b-0333 
 Volume    34 
71Author    Norio Miyoshi, Giiti TomitaRequires cookie*
 Title    Quenching of Singlet Oxygen by Sodium Azide in Reversed Micellar Systems  
 Abstract    The oxidation reaction of singlet oxygen with 1,3-diphenylisobenzofuran was in-vestigated in cyclohexanic reversed micellar solutions of dodecylammonium propionate, using pyrene as photosensitizer. The furan oxidation was effectively inhibited by azide ion-bound reversed micelles. Empty reversed micelles also inhibited the furan oxidation to some extent. The inhibition of the furan oxidation was due to the quenching of singlet oxygen by azide ion-bound and empty reversed micelles. Such singlet oxygen quenching was dependent on the concentration of water added. Results obtained were discussed in connection with the polarity in the interior of reversed micelles, micellar size, the state of water solubilized in reversed micelles and the lifetime of singlet oxygen. The heavy atom effect on the quenching of singlet oxygen was also studied using heavy water. 
  Reference    Z. Naturforsch. 34b, 339—343 (1979); received October 4 1978 
  Published    1979 
  Keywords    Singlet Oxygen, Sodium Azide, Diphenylisobenzofuran, Reversed Micelles 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0339.pdf 
 Identifier    ZNB-1979-34b-0339 
 Volume    34 
72Author    Shozi Yamashita, Giiti TomitaRequires cookie*
 Title    The Delayed Luminescence of Tryptophan in Aqueous LiCl Solutions at 77 K  
 Abstract    Recombination Luminescence, Tryptophan, Trapped Electron The effect of LiCl on the delayed luminescence caused by the recombination of photo -ejected electrons with tryptophan cations in aqueous solutions was investigated at 77 K. The luminescence intensity strongly depended on LiCl concentration. At high LiCl concen-trations, the intensity of the fast decay component of the recombination fluorescence decreased to a constant value, whereas that of the slow decay component inversely increased. The intensity of the recombination phosphorescence was weak and unchanged in low LiCl concentration range but increased steeply above 7 M LiCl. NO3, electron scavenger, quenched both the recombination fluorescence and phosphorescence, but the degree of the quenching decreased rapidly in the order of the fast decay component of the recombination fluorescence, the slow decay component of the recombination fluorescence, the recombination phosphorescence. Furthermore, the quenching efficiency of NO3 for each recombination luminescence was found to diminish with increasing LiCl concen-tration. The distribution of photo-ejected electrons to shallow-and deep-traps, dependent on LiCl concentration, was discussed from results obtained. 
  Reference    Z. Naturforsch. 34b, 344—349 (1979); received October 17 1978 
  Published    1979 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0344.pdf 
 Identifier    ZNB-1979-34b-0344 
 Volume    34 
73Author    Christoph Tiburtius, Hans-Uwe SchusterRequires cookie*
 Title    AB2X2 Compounds of Beryllium with 2 A-and 5 B-Elements  
 Abstract    The new compounds MgBe2P2, MgBe2As2, CaBe2P2 and CaBe2As2 have been prepared. They are supposed to crystallize trigonally in a CaAl2Si2-type structure. 
  Reference    Z. Naturforsch. 34b, 350—351 (1979); eingegangen am 23. Oktober 1978 
  Published    1979 
  Keywords    Beryllium Compounds, 2A-Elements, Phosphides, Arsenides 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0350_n.pdf 
 Identifier    ZNB-1979-34b-0350_n 
 Volume    34 
74Author    Naalsi Und Naalge, Wolfgang Westerhaus, Hans-Uwe SchusterRequires cookie*
 Title    Darstellung und Struktur Preparation and Structure of NaAlSi and NaAlGe  
 Abstract    The intermetallic compounds NaAlSi and NaAlGe have been prepared and their structure has been determined by powder data. They crystallize in an on^-PbFCl-type lattice with the following cell dimensions: 
  Reference    Z. Naturforsch. 34b, 352—353 (1979); eingegangen am 23. Oktober 1978 
  Published    1979 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0352_n.pdf 
 Identifier    ZNB-1979-34b-0352_n 
 Volume    34 
75Author    Hans-Uwe Schuster, Cornelia Mues, Walter JungRequires cookie*
 Title    Darstellung und Kristallstruktur des Na2AgSb Preparation and Crystal Structure of Na2AgSb  
 Abstract    Na2AgSb crystallizes orthorhombically, space group Cmcm, with a = 929.2 pm, b = 790.3 pm, c = 577.3 pm. The structure contains Ag-Sb-zigzag-chains with -^Ag-Sb-Ag = 180° and Sb-Ag-Sb = 64.9°. 
  Reference    Z. Naturforsch. 34b, 354—355 (1979); eingegangen am 6. November 1978 
  Published    1979 
  Keywords    Intermetallic Compound, Crystal Structure, Ternary Antimonide 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0354_n.pdf 
 Identifier    ZNB-1979-34b-0354_n 
 Volume    34 
76Author    Nils Wiberg, Heinz-Wolfgang Häring, Sham Kumar VasishtRequires cookie*
 Title    Tetrazen aus Diazen [1] Tetrazene from Diazene  
 Abstract    Bis(trimethylsilyl)diazene, Diazene, Tetrazene The acid-catalyzed decomposition of diazene, formed as an intermediate by the reaction of bis(trimethylsilyl)diazene with acids, leads by dimerisation via tetrazene to ammonium azide. 
  Reference    Z. Naturforsch. 34b, 356—357 (1979); eingegangen am 3. Oktober 1978 
  Published    1979 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0356_n.pdf 
 Identifier    ZNB-1979-34b-0356_n 
 Volume    34 
77Author    Jürgen Evers, Gilbert Oehlinger, Armin WeissRequires cookie*
 Title    Umwandlung gewellter Si-Schichten in einen Si-Raumnetzverband Transformation of Corrugated Si-Layers into a Three-Dimensional Si-Network  
  Reference    Z. Naturforsch. 34b, 358—359 (1979); eingegangen am 18. Oktober 1978 
  Published    1979 
  Keywords    Trigonal Ca-Sr-Silicide, High Pressure Ca-Sr-Silicide, Tetragonal Cao65Sr63sSi2, Si-Skeletons and Layers 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0358_n.pdf 
 Identifier    ZNB-1979-34b-0358_n 
 Volume    34 
78Author    Alois Nagel, Klaus-Jürgen RangeRequires cookie*
 Title    Die Kristallstruktur von Ag7GeS5I The Crystal Structure of Ag7GeS5I  
 Abstract    The unit cell of Ag7GeSsI, a member of the argyrodite family, is cubic face-centered with a = 1072.2(7) pm and Z = 4. The anion lattice consists of three-dimensionally connected Frank-Kasper polyhedra with C. N. 12 and 16. The silver ions are statistically distributed over a number of sites with C. N. 4, 3 and 2, formed by isolated GeS4-tetrahedra, as well as isolated S 2 ~-and I~-ions. 
  Reference    Z. Naturforsch. 34b, 360—362 (1979); eingegangen am 26. Oktober 1978 
  Published    1979 
  Keywords    Silver Germanium Sulfide Iodide, Crystal Structure, Argyrodite Family 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0360_n.pdf 
 Identifier    ZNB-1979-34b-0360_n 
 Volume    34 
79Author    H. ParlarRequires cookie*
 Title    Konkurrenzreaktionen einiger tricyclischer Diene zur [2 2]PhotocycIoaddition Competitive Reaction of Some Tricyclic Dienes to [2+2]Photocycloaddition  
 Abstract    The UV-behaviour of some chlorinated tri-cyclic dienes (la-e) was studied in acetone. Cycloaddition (2a-b and 2d-c), hydrogen-transfer (3c' and 3d) and photo ene-(3c)-reaction products could be isolated and identified with the help of spectroscopic methods. 
  Reference    Z. Naturforsch. 34b, 363—365 (1979); eingegangen am 24. Oktober 1978 
  Published    1979 
  Keywords    UV Photolysis, Quantum Yields, Chlorinated Tricyclic Dienes 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0363_n.pdf 
 Identifier    ZNB-1979-34b-0363_n 
 Volume    34 
80Author    Requires cookie*
 Title    [%]  
  Reference    Z. Naturforsch. 34b, 366—1678 (1979) 
  Published    1979 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0366_n.pdf 
 Identifier    ZNB-1979-34b-0366_n 
 Volume    34 
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