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1976 (386)
101Author    Hans Guntner, KarlE. SchwarzhansRequires cookie*
 Title    Darstellung und Oxidation von Mangan(II)-Komplexen mit L-Cystein und Dipeptiden als Liganden Preparation and Oxidation Reactions of Manganese (II) Complexes with L-Cysteine and Dipeptides as Ligands  
 Abstract    Manganese(II) Complexes, Dipeptides, Oxidation Complexes formed between manganese(II) and the ligands Gly-Tyr, Gly-Phe, Ala-Ala, Tyr, cysteine and cystine have been prepared. The IR, EPR spectra and the magnetic moments of the compounds have been collected. Oxidation of the dipeptide complexes in solution leads to manganese (III) species. Darstellung und Oxidation von Mangan(II)-Komplexen mit L-Cystein und Dipeptiden als Liganden Seit langem weiß man, daß Mangan am wasser-spaltenden System der Photosynthese in Form eines membrangebundenen Lipoproteinkomplexes beteiligt ist 1-5 . Die Reaktion ist mit großer Wahr-scheinlichkeit von einem Wechsel des Oxidations-zustandes im Metallzentrum begleitet. Mangan ist darüber hinaus aber in einer ganzen Reihe weiterer Proteinsysteme, vor allem in Metallenzymen wie in Decarboxylasen, Phosphatasen und Enolasen ent-halten. Die Zahl der bekannten Beispiele beträgt weit über 50 6 . Die Bindungsfestigkeit an Proteine ist im Vergleich zu anderen Übergangsmetallionen jedoch geringer, da Mangan als untypisches Ele-ment dieser Reihe mit seiner gerade halb gefüllten, kugelsymmetrischen 3 d-Elektronenschale chemisch stark dem Magnesium ähnelt. Die genauere Bindungsart konnte bereits in eini-gen Fällen teilweise aufgeklärt werden dmch Elektronenabsorptions-und ESR-Spektroskopie 7 « 8 . In den meisten Fällen machen die Ergebnisse eine Sonderdruckanforderungen an Prof. Dr. KARL E. 
  Reference    (Z. Naturforsch. 31b, 448—454 [1976]; eingegangen am 7. November 1975) 
  Published    1976 
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 Identifier    ZNB-1976-31b-0448 
 Volume    31 
102Author    Peter Feldhaus, Richard Ratka, Hermann Schmid, ManfredL. ZieglerRequires cookie*
 Title    Reaktion von 1.4-Dienen mit Metallkomplexen, I Darstellung und Röntgenstrukturanalyse eines 7t-enyl-Komplexes der Zusammensetzung (C8H13 PdCl)2 Reaction of 1,4-Dienes with Metal Complexes, I Synthesis and X-ray Structure Determination of a rc-enyl Complex of Composition (C8H13PdCl)2  
 Abstract    Synthesis, X-ray, Tt-enyl Complex Reaction of (CßHsCN^PdC^ and 1,3-dimethylenecyclohexane led to an exocyclic 7r-enyl complex of formula (C8Hi3PdCl)2-bis(^ 3 -2-methylene-6-methylcyclohexyl)(di-/i-chloro)-dipalladium. IR and X H NMR data are in agreement with this formulation. The compound is monoclinic, with unit cell dimensions a — 499.97 ± 0.08, b = 1342.26 ± 0.19, c= 1379.60 ± 0.20 pm, ß = 99.43 ± 0.02°, space group C|h-P2i/C, Z = 2, dx_ray = 1.83 g/cm 3 . The structure was determined from three-dimensional X-ray data by Patterson and Fourier methods. Least squares refinement by use of 1045 independent reflections has reached i?i = 5.6%. Zweck dieser Arbeit war es, das Reaktionsver-halten des cyclischen 1.4-Diens, 1.3-Dimethylen-cyclohexan (1), mit (C6H5CN)2PdCl2 (2) bzw. Na2[PdCLi] (3) zu untersuchen. Das gespannte -i2 -J2 1 4a 4b Dien 1 sollte zumindest im Vergleich mit 1.4-Pentadien eine erhöhte Reaktivität erwarten lassen; Isomerisierungs-und Disproportionierungsreaktio-nen bei anderen ungesättigten Systemen in An-wesenheit von Palladium-bzw. Platinverbindungen sind bekannt 1-3 . Die Reaktion von 1 mit 2 bzw. 3 ergab jeweils zwei gelbe Substanzen, von denen eine aufgrund ihrer Instabilität und geringen Konzen-tration nicht identifiziert werden konnte. Die zweite kristalline Verbindung muß aufgrund 
  Reference    (Z. Naturforsch. 31b, 455—462 [1976]; eingegangen am 11. November/6. Dezember 1975) 
  Published    1976 
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 Identifier    ZNB-1976-31b-0455 
 Volume    31 
103Author    Requires cookie*
 Title      
 Abstract    Mass Spectra, Dialkylthiosulfonates The mass spectra of six symmetrically (R'=R) and three unsymmetrically (R'^R) substituted dialkylthiolsulfonates have been determined. With the exception of the diethyl derivative the base peak is derived from direct fission of the sulfinyl S-R bond. Fission of the S-S bond with rearrangement and rearrangement of the alkyl residue are two further processes of importance enabling characterisation of the species. 
  Reference    (Z. Naturforsch. 31b, 463—465 [1976]; received December 12 1975) 
  Published    1976 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0463.pdf 
 Identifier    ZNB-1976-31b-0463 
 Volume    31 
104Author    CrI. Simionescu, S. Dumitriu, V. I. PopaRequires cookie*
 Title    im kalten Plasma The Mechanism and Kinetics of Methane-Water Mixture Decomposition in Cold Plasma  
 Abstract    In the present paper the mechanism and kinetics of methane-water mixtures decompo-sition in cold plasma are discussed. It was found that nature and composition of the products depend on reaction time, ratio of the two components, and how long the products are in contact after the decomposition was performed. Reactions in the decomposition system generally follow two mechanisms: corresponding to the discharge phase and to postreaction one. The highest yield of formaldehyde was obtained for the ratio methane water of 0.6-1 and two minutes of discharge. Die Bildung von Formaldehyd aus den hypothe-tischen Bestandteilen der Uratmosphäre wurde von LÖB 1 noch im Jahre 1906 in den dmch elektrische Entladungen in einer Mischung von Kohlendioxyd und Wasser entstandenen Produkten nachgewiesen. Später erwähnt derselbe Verfasser die Erzeugung von Glycin über Formaldehyd in einem aus Kohlen-mon-oder -dioxyd, Ammoniak und Wasser beste-henden System. Die Verwendung anderer Systeme (CO + H2; 
  Reference    (Z. Naturforsch. 31b, 466—471 [1976]; eingegangen am 5. November 1975) 
  Published    1976 
  Keywords    Methane-Water, Decomposition, Formaldehyde, Mechanism, Kinetics 
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 Identifier    ZNB-1976-31b-0466 
 Volume    31 
105Author    Oswald Adler, Friedhelm KoberRequires cookie*
 Title    von 2-Diphenylamino-[1.3.2] oxathiaarsolan x n NMR Spectroscopic Analysis of 2-Diphenylamino-[l,3,2]oxathiaarsolane  
 Abstract    1 H NMR, Oxathiaarsolane, As-N-Compounds X H NMR spectral data of 2-diphenylamino-[l,3,2]oxathiaarsolane are presented and discussed. The protons of the CH2-groups form an AKPX-spin system. The vicinal H-C-C-H coupling constants indicate a twist-envelope conformation. A rapid inversion at arsenic does not take place. In Fortsetzung unserer Untersuchungen an Arso-lanen 1-8 berichten wir über die 1 H-NMR-spektro-skopische Analyse der Methylenprotonen im 2-Diphenylamino -[1.3.2]oxathiaarsolan (1). Bei einer schnellen Inversion am Arsen sollten die Methylenprotonen bei Oxathiaarsolanen ein 
  Reference    (Z. Naturforsch. 31b, 472—474 [1976]; eingegangen am 5. Januar 1976) 
  Published    1976 
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 Identifier    ZNB-1976-31b-0472 
 Volume    31 
106Author    H.-H Perkampus, E. SchönbergerRequires cookie*
 Title    Untersuchungen über die Wechselwirkung von Aromaten mit Antimontrichlorid, III Schmelzdiagramme der binären Systeme* Investigations about the Interaction of Aromatic Compounds with Antimony chloride, III Melting Diagrams of Binary Systems  
 Abstract    This paper presents the results of investigations of the melting diagrams for the systems durene/SbCl3, pentamethylbenzene/SbCl3, hexamethylbenzene/SbCl3, diphenyl/SbCl3, naphthalene/SbCl3, 2,3-dimethylnaphthalene/SbCl3, phenanthrene/SbCl3 and anthracene/ SbCl3; in all cases solid complexes with the composition ArH • 2 SbCl3 were formed. 
  Reference    (Z. Naturforsch. 31b, 475—479 [1976]; eingegangen am 8. Dezember 1975) 
  Published    1976 
  Keywords    Melting Diagrams, Molecular Compounds, Aromatic Compounds, Antimonytrichloride 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0475.pdf 
 Identifier    ZNB-1976-31b-0475 
 Volume    31 
107Author    Friedrich Boberg, Rainer VossRequires cookie*
 Title    Markierte Verbindungen, XXV 1 Chloraustausch zwischen 1.2.3.3-Tetrachlor-l-propen und Antimon(III)-chlorid -das 1.2.3-Trichlorpropenylium-Ion On Labelled Compounds, XXV 1 Chlorine Exchange between 1,2,3,3-Tetrachloro-l-propene and Antimony(Ill)-chloride — the 1,2,3-Trichloropropenylium Ion  
  Reference    (Z. Naturforsch. 31b, 480—486 [1976]; eingegangen am 13. November 1975) 
  Published    1976 
  Keywords    Chlorine Exchange, 1, 2, 3, 3-Tetrachloro-l-propene, 1, 2, 3-Trichloropropenylium Ion, Ally lie Rearrangement, eis j trans-Isomerization 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0480.pdf 
 Identifier    ZNB-1976-31b-0480 
 Volume    31 
108Author    Y. Maeda, T. Harami, A. Trautwein, U. GonserRequires cookie*
 Title    Orientation of the EFG Tensor with Respect to the Heme Group of Deoxymyoglobin  
 Abstract    EFG Tensor, Herne Group, Deoxymyoglobin Following Zimmermann's method of correlating intensity tensors from single crystal Mössbauer spectra with electric field gradient (EFG) tensors we are able to derive a manyfold of solutions for the orientation of the principal axis system of the local EFG 0£y£ with respect to the heme coordinate system in deoxymyoglobin. Comparing these results with theoretical estimates of the asymmetry parameter r\ we are able to limit the range of possible orientations of 0£y£, and we find to be rather close to the heme plane with a deviation from that of at most 14°. 
  Reference    (Z. Naturforsch. 31b, 487—490 [1976]; received July 30 1975) 
  Published    1976 
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 Identifier    ZNB-1976-31b-0487 
 Volume    31 
109Author    AbdelHamid Harhash, Afaf Abdel, Aziz El-BannaniRequires cookie*
 Title    A Reinvestigation of the Reaction of Salicylideneaniline with Potassium Cyanide  
 Abstract    Salicylideneaniline, Potassium Cyanide, Hydrocyano Derivatives Treatment of salicylidene-anils with potassium cyanide in acetic acid affords 1:1 ad-ducts shown to be the hydrocyano derivatives. When the reaction is conducted in alcohol, salicylidene derivatives of 2-amino-3-arylaminobenzofurans or a-arylamino-o-hydroxy-phenylacetamides are formed depending on the molar ratio of the reactants. The formation of the products and the previously reported structures are discussed. 
  Reference    (Z. Naturforsch. 31b, 491—494 [1976]; received September 5 1975) 
  Published    1976 
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 Identifier    ZNB-1976-31b-0491 
 Volume    31 
110Author    FaridS G Soliman, Thomas KappeRequires cookie*
 Title    Syntheses of Heterocyeles, 191 Reactions of /3-Aminocrotononitrile with Heterocyclic Phenolic Compounds /S-Aminocrotononitrile, 4-Hydroxycoumarin, 4-Hydroxycarbostyril, 4-Hydroxy-2-pyrones, 4-Hydroxy-2-pyridones  
  Reference    (Z. Naturforsch. 31b, 495—499 [1976]; received November 121975) 
  Published    1976 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0495.pdf 
 Identifier    ZNB-1976-31b-0495 
 Volume    31 
111Author    MesoionicSixmembered Heterocycles, Vi, Gerda Schindler, Demetrius Furtunopulos, Thomas KappeRequires cookie*
 Title    Mesoionische Sechsringheterocyclen, VI 1 Umlagerungen von Heterocyclen, IV 2 Zur thermischen Umlagerung von N-Benzyl-pyrimidinmesoionen Rearrangement Reactions of Heterocycles, IV 2 Thermal Rearrangement of Mesoionic N-Benzyl-pyrimidines Mesoionic-N-benzyl-pyrimidines, 6-Benzyloxy-4-pyrimidones, N->C-Benzyl Group Migration  
  Reference    (Z. Naturforsch. 31b, 500—504 [1976]; eingegangen am 9. Oktober 1975) 
  Published    1976 
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 Identifier    ZNB-1976-31b-0500 
 Volume    31 
112Author    A. K. Mansour, Y. A. Ibrahim, M. M. EidRequires cookie*
 Title    Nucleoside Derivatives of 1,2,4-Triazine Reaction of Some Derivatives of 1,2,4-Triazine with Tetra-O-acetyl-a-D-glucopyranosyl Bromide  
 Abstract    Triazines, Nucleoside Derivatives 4,6-Diphenyl-, 6-phenyl-4-p-tolyl-and 6-styryl-4-phenyl-3-thioxo-5-oxo-2,3,4,5-tetra-hydro-l,2,4-triazines (la-c) react with tetra-O-acetyl-a-D-glucopyranosyl bromide (2) to give the corresponding 2-tetra-0-acetyl-/?-D-glucopyranosyl derivatives (4 a-c), respec-tively. Oxidation of 4a with H2O2 gives the 3,5-dioxo derivative (7). On the other hand deacetylation of 4 a affords 2-/?-D-glucopyranosyl-4,6-diphenyl-3-thioxo-5-oxo-2,3,4,5-tetrahydro-l,2,4-triazine (8). Furfurylidene pyruvic acid condenses with 4-phenylthiose-micarbazide to give 6-furfurylidene-4-phenyl-3-thioxo-5-oxo-2,3,4,5-tetrahydro-1,2,4-triazine (Id). Id reacts with ethyl iodide to give the 3-ethylmercapto derivative (9), and reacts with 2 to give 4d. 
  Reference    (Z. Naturforsch. 31b, 505—508 [1976]; received July 27 1975) 
  Published    1976 
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 Identifier    ZNB-1976-31b-0505 
 Volume    31 
113Author    J. Dusemund, K. RothRequires cookie*
 Title    Über die Anwendung von NMR-Verschiebungsreagenzien zur Strukturaufklärung von Chinazolinderivaten Application of NMR Shift Reagents for Structure Determination of Quinazoline Derivatives  
 Abstract    NMR Shift Reagents, Quinazolines, Spin Decoupling The iH NMR spectra of quinazoline-disulfide (8) and some known quinazolines (3, 7 a, 7 b) were analyzed by the combination of spin decoupling experiments and simultaneous addition of Eu(fod)3. Under the assumption of an independent 1:1-complex formation of both quinazoline-nitrogens with the shift reagent (i.e. the l:2-complex concentration is negligible) there exists a linear dependence between the chemical shift of different protons within one compound. The slopes of corresponding protons of 8 differ from those of 3, 7 a, 7 b due to steric effects. 
  Reference    (Z. Naturforsch. 31b, 509—513 [1976]; eingegangen am 20. Oktober/4. Dezember 1975) 
  Published    1976 
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 Identifier    ZNB-1976-31b-0509 
 Volume    31 
114Author    Synthesen Von Fluoreszierenden Pyronokondensierten Heterocyclen, OttoS. Wolebeis, Erich ZieglerRequires cookie*
 Title    Zur Reaktivität von C —N-Doppelbindungssystemen, VII 1 Syntheses of Condensed Pyronoheterocycles  
 Abstract    Anilinomethylenechroman-2,4-dione, Anilinomethylene-2,4-dioxo-tetrahydroquinoline, Pyronocoumarine, Pyrono -2 -quinolone 
  Reference    (Z. Naturforsch. 31b, 514—519 [1976]; eingegangen am 8. Dezember 1975) 
  Published    1976 
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 Identifier    ZNB-1976-31b-0514 
 Volume    31 
115Author    Axel Widera, Brigitte Eisenmann, Herbert SchäferRequires cookie*
 Title    Darstellung und Kristallstruktur des Sr2Si Preparation and Crystal Structure of Sr2Si  
  Reference    (Z. Naturforsch. 31b, 520—521 [1976]) 
  Published    1976 
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 Identifier    ZNB-1976-31b-0520_n 
 Volume    31 
116Author    K. Diehl, D. Khodadadeh, J. Kummer, SträhleRequires cookie*
 Title     
 Abstract    Upon use of a synthetic method reported earlier by us respective alloys of Na/Sn, Na/Ge and Na/Sb are dissolved in ethylene-diamine and the title compounds precipitated from the solutions in high yield. By recrystal-lisation well shaped, stable crystals are obtain-ed. The crystal structure of [Na4 • 7 en]Sn9 confirms the presence of a Sn9 4 ~-polyhedron which had been suggested by us on the basis of other investigations. The Sn9 4_ -polyhedron may be described as a distorted tricapped trigonal prism. Ethylenediamine is coordi-nated to Na+-ions exclusively. 
  Reference    (Z. Naturforsch. 31b, 522—524 [1976]; eingegangen am 16. Februar 1976) 
  Published    1976 
  Keywords    Polyanionic Compounds, Germanium, Tin, Antimony, Crystal Structure 
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 Identifier    ZNB-1976-31b-0522_n 
 Volume    31 
117Author    Paul Bachmann, Hellmut SingerRequires cookie*
 Title    Cationic Tetramethylthiophene-cyclopentadienyl-iron(II)  
 Abstract    Cationic Tetramethylthiophene-cyclopentadienyl-iron(II), Preparation, Spectra Exchange of one cyclopentadienylring in different ferrocenes by tetra-or dimethyl-thiophene gives cationic thiopheneeyclo-pentadienyl-iron(II)-complexes, which were characterized spectroscopically. 
  Reference    (Z. Naturforsch. 31b, 525 [1976]; eingegangen am 18. Dezember 1975) 
  Published    1976 
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 Identifier    ZNB-1976-31b-0525_n 
 Volume    31 
118Author    Roger Blachnik, Bernd GatherRequires cookie*
 Title    Some New Ternary Gold Chalcogenides  
 Abstract    The ternary compounds Au2 As2Te3, AuSbTe und AuSbo,o77Te2 have been found. Melting point or peritectic temperature as well as microhardness and X-ray diagramm have been measured. 
  Reference    (Z. Naturforsch. 31b, 526—527 [1976]) 
  Published    1976 
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 Identifier    ZNB-1976-31b-0526_n 
 Volume    31 
119Author    H. H. Otto, W. Holzapfel, H. Yersin, G. GliemannRequires cookie*
 Title      
 Abstract    Crystal Data, Lattice Constants, X-ray Cs2[Pt(CN)4] • H20 is hexagonal with lattice constants a0 = 9.687(2) and c0 = 19.336(6) A; the probable space groups are C|-P6x or CI-P65. The observed density yielded 3.67(4) g/cm 3 and the calculated one 3.697 g/cm 3 for two formula units per unit cell. X-ray powder data are given. The [Pt(CN)4] 2 ~ groups do not lie one above the other but form a helix along the c-axis. 
  Reference    (Z. Naturforsch. 31b, 528—529 [1976]; received December 12 1975) 
  Published    1976 
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 Identifier    ZNB-1976-31b-0528_n 
 Volume    31 
120Author    R. Proetzsch, D. Bieniek, F. KörteRequires cookie*
 Title    High Pressme Reactions, XII 1 Behaviour of Thiolactones and Selected Sulphur Containing Heterocycles at High Pressures  
 Abstract    High Pressure, Thiolactones, Dimerisation, Trimerisation y-Thiovalerolactone (1), under high pres-sure (15 kbar, 170 °C), forms the compounds 2 and 3. Under similar conditions, <5-thio-valerolactone polymerizes nearly quantita-tively; at 11 kbar and 170 °C, 5 is formed in 2% yield. Thiooxindole 7 reacts to yield 8 and the thermically very stable trimer 9. 
  Reference    (Z. Naturforsch. 31b, 529—530 [1976]; eingegangen am 21. November 1975) 
  Published    1976 
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 Identifier    ZNB-1976-31b-0529_n 
 Volume    31 
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