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Facet   section ZfN Section B:Volume 035  [X]
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1980 (345)
181Author    Hans-Ludwig Krauss, Erich HumsRequires cookie*
 Title    Oberflächenverbindungen yon Übergangsmetallen, XXIII [1] Die Umsetzung cyclischer Olefine mit Oberflächen-Chrom(II) auf Silicagel bei höherer Temperatur Surface Compounds of Transition Metals, XXIII [1] The Reaction of Cycloolefines with Surface Chromium (II) on Silicagel at Higher Temperature  
 Abstract    By reaction with surface chromium(II) on silicagel at T > 150 °C, cycloolefins can undergo ring contraction, methylation/demethylation, hydrogenation/dehydrogenation, and iso-meri7ation. Furthermore, n-alkanes (Ci... C4) are formed incorporating support hydrogen. -As in the case of the corresponding acyclic olefins, a common intermediate MC3 (metalla-cyclobutane^HM-allyl complex) for all these reactions is postulated; the transfer of Ci units is claimed to proceed via a carbene M = CH2 derived from the MC3 precursor. 
  Reference    Z. Naturforsch. 35b, 848—854 (1980); eingegangen am 21. Februar 1980 
  Published    1980 
  Keywords    Surface Compounds, Ring Contraction, Methylation/Demethylation, Hydrogenation/Dehydrogenation, Carbene Intermediates 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0848.pdf 
 Identifier    ZNB-1980-35b-0848 
 Volume    35 
182Author    Ulf ThewaltRequires cookie*
 Title    S4N4 und seine Derivate: a-FeCl3 * S4N4, ein Übergangsmetallkomplex mit dem S4N4-Ligand S4N4 and its Derivatives: a-FeCL * S4N4, a Transition Metal Complex with the S4N4 Ligand  
 Abstract    Iron(III) Complex, Molecular Structure The adduct a-FeCL • S4N4 has been prepared from FeCl3 and S4N4 in CCI4. The new compound crystallizes in the monoclinic space group P 2i/c with Z — 4 and lattice para-meters a = 6.360(2), b = 13.066(4), c = 12.686(5) A, and ß = 99.43(3)°. An X-ray analysis shows that the S4N4 ring is bonded via one of its nitrogen atoms to the iron atom of the FeCl3 group and that the four ligand atoms around the iron atom form a tetrahedron. The structure of the complex is similar to the known structure of BF3 • S4N4. 
  Reference    Z. Naturforsch. 35b, 855—859 (1980); eingegangen am 7. März 1980 
  Published    1980 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0855.pdf 
 Identifier    ZNB-1980-35b-0855 
 Volume    35 
183Author    W. PetzRequires cookie*
 Title    Darstellung von Eisentetracarbonylkomplexen mit Thioacetamiden als Liganden Preparation of Iron Tetracarbonyl Complexes with Thioacetamides as Ligands  
 Abstract    The thioacetamids S = C(CH3)(NHR) (R = H, la; R = Ph, lb) react with Fe2(CO)9 to form the iron tetracarbonyl complexes 2 and 3 with S-bonded ligands. IR, X H, 13 C and mass spectra of these new compounds are reported. 
  Reference    Z. Naturforsch. 35b, 860—862 (1980); eingegangen am 17. März 1980 
  Published    1980 
  Keywords    Iron Carbonyl Complexes, Thioacetamid Ligands, NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0860.pdf 
 Identifier    ZNB-1980-35b-0860 
 Volume    35 
184Author    Herbert Schumann, Manfred MeissnerRequires cookie*
 Title    Organometallphosphin-substituierte Übergangsmetallkomplexe, XXVII [1] Trinitrosyl-organometallphosphin-mangan-Komplexe Organometalphosphine-Substituted Transition Metal Complexes, XXVII [1] Trinitrosy 1 (organometalphosphine)manganese Complexes  
 Abstract    The reactions of carbonyl trinitrosyl manganese with tri-ferf-butylphosphine, di-(ter£-butyl)-trimethylsilyl-, -germyl-, -stannyl-phosphine, fer£-butyl-bis(trimethylsilyl)-, -(germyl)-, -(stannyl)-phosphine, as well as with tris(trimethylsilyl)-, -(germyl)-, and -(stannyl)phosphine result in the elimination of the CO ligand and the formation of corresponding trinitrosyl(organometalphosphine)manganese complexes. The IR, UV, 1 H, 31 P, and 55 Mn NMR spectra are reported and discussed. 
  Reference    Z. Naturforsch. 35b, 863—868 (1980); eingegangen am 7. März 1980 
  Published    1980 
  Keywords    Nitrosyl(organometalphosphine)manganese Complexes Organometal Phosphines, Trinitrosyl Manganese Complexes, NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0863.pdf 
 Identifier    ZNB-1980-35b-0863 
 Volume    35 
185Author    Franz Fehér, Franz Ocklenburg, Dieter SkrodzkiRequires cookie*
 Title    Beiträge zur Chemie des Siliciums und Germaniums, XXXII [1] Isomerisierung von höheren Silanen mit Aluminiumchlorid Contributions to the Chemistry of Silicon and Germanium, XXXII [1] Isomerization of Higher Silanes with Aluminium Chloride  
 Abstract    n-Tetrasilane, n-Pentasilane, n-Hexasilane, Isomerization n-Tetrasilane, n-pentasilane and n-hexasilane have been heated with aluminium chloride in different solvents. In aromatic solvents besides competitive disproportionation reactions isomerization reactions occur, whereas in non-aromatic solvents only decomposi-tion can be observed. The conditions have been investigated, where isomerization reactions predominate and from n-tetrasilane iso-tetrasilane, from n-pentasilane iso-and neo-penta-silane as well as from n-hexasilane 2-silylpentasilane, 3-silylpentasilane, 2,3-disilyltetra-silane, and 2,2-disilyltetrasilane are formed in good yields. 
  Reference    Z. Naturforsch. 35b, 869—872 (1980); eingegangen am 21. März 1980 
  Published    1980 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0869.pdf 
 Identifier    ZNB-1980-35b-0869 
 Volume    35 
186Author    Walter Siebert, Hans Schmidt, Roland FullRequires cookie*
 Title    Darstellung und Ligandeneigensehaften eines 1.2.5-Azadiborolen-Derivates [1] Synthesis and Ligand Properties of an 1,2,5-Azadiborolene Derivative [1]  
 Abstract    1,2,5-Azadiborolene, Azadiborolene Transition Metal Complexes 3,4-Diethyl-l,2,5-trimethyl-l,2,5-azadiborolene (3) is obtained from 3,4-diethyl-2,5-dimethyl-l,2,5-thiadiborolene (1) and heptamethyldistannazan. The Lewis-acidic ti 4 ligand (3) forms the transition metal complexes 5, 6, 7 and 8, when reacted with Fe2(CO)9, (C5H5)CO(CO)2, Ni(CO)4 and Co2(CO)8, respectively. The properties of 5-8 are compared with those of the corresponding thiadiborolene complexes. In contrast to 1 the azadi-borolene ligand does not favor the formation of tripledecker complexes. 
  Reference    Z. Naturforsch. 35b, 873—881 (1980); eingegangen am 10. März 1980 
  Published    1980 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0873.pdf 
 Identifier    ZNB-1980-35b-0873 
 Volume    35 
187Author    Jan Bergman, Lars EngmanRequires cookie*
 Title    Tellurium in Organic Synthesis, IX [15] Oxidation of Some Nitrogenous Compounds with Te02  
 Abstract    Some phenylhydrazines were readily converted to diaryltellurium dichlorides in 27-40% yield when treated with Te02 in refluxing acetic acid containing lithium chloride. It was also found that certain ketones could be regenerated from their corresponding semi-carbazones, azines and hydrazones when submitted to the same reaction conditions. 
  Reference    Z. Naturforsch. 35b, 882—884 (1980); received February 18 1980 
  Published    1980 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0882.pdf 
 Identifier    ZNB-1980-35b-0882 
 Volume    35 
188Author    Hans Achenbach, Bernd RaffelsbergerRequires cookie*
 Title    Alkaloide in Tabernaemontana-Arten, XII [1]  
 Abstract    From the methanolic extract of the stems of T. olivacea we isolated 12 alkaloids and deduced their structures. The main alkaloidal constituent is the new compound condylo- carpine-Nt,-oxide (1). Besides this, we found akuammidine (16) and 10 further known alkaloids, which belong to the ibogamine-type. 
  Reference    Z. Naturforsch. 35b, 885—891 (1980); eingegangen am 4. Februar 1980 
  Published    1980 
  Keywords    Alkaloids, Tabernaemontana olivacea, Condylocarpine-N-oxide 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0885.pdf 
 Identifier    ZNB-1980-35b-0885 
 Volume    35 
189Author    Wolfgang Stadlbauer, Nadia Ghobrial, Thomas KappeRequires cookie*
 Title    Synthese von Isocumarinen aus Phenylmalonylheterocyclen Synthesis of Isoeoumarines from Phenylmalonyl Heterocyclic Compounds  
 Abstract    Reaction of diphenylcarbonate (2) with enolized phenylmalonyl heterocyclic compounds as the quinolones 1 a-c, the quinolizinones 4 or the phenalenones 6 a, b yields the condensed isoeoumarines 3 a-c, 5 or 7 a, b, respectively. Contrary to these results 3-hydroxy-2-phenyl-chinchonic acid (8) or its decarboxylated product 10 do not form the expected isocoumarin 9 but afford the diquinolino-y-pyrone 11. 
  Reference    Z. Naturforsch. 35b, 892—895 (1980); eingegangen am 19. März 1980 
  Published    1980 
  Keywords    Diphenylcarbonate, Enolized Phenylmalonyl Heterocyclic Compounds, [2] Benzopyranones, Carbonylizing Cyclization 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0892.pdf 
 Identifier    ZNB-1980-35b-0892 
 Volume    35 
190Author    Wolf-H GündelRequires cookie*
 Title    Reaktionen von Cyanpyridinium-Salzen mit Hydroxylamin Investigations of Quaternary Pyridinium Salts, XI [1] Reactions of Cyanopyridinium Salts with Hydroxylamine  
 Abstract    The preparation of quaternary pyridinium salts with amidoxime group in 2-, 3-and 4-position is described. The isomer with the substituent in 3-position rearranges on addition of base to a l-hydroxy-2-imino-3-pyridinecarbaldimine. The reaction of 3-cyano-pyridinium salts with hydroxylamine and potassium terf-butoxide gives derivatives of dipyrido[l,2-a: 3',4'-c]pyrrole. 
  Reference    Z. Naturforsch. 35b, 896—901 (1980); eingegangen am 21. März 1980 
  Published    1980 
  Keywords    Pyridinium Salts, Rearrangement, Condensation Reaction 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0896.pdf 
 Identifier    ZNB-1980-35b-0896 
 Volume    35 
191Author    Hubert Schönowsky, Hermann BieringerRequires cookie*
 Title    Nitrodiphenylether, ihre Herstellung und herbizide Wirkung* Nitrodiphenylethers, their Preparation and Herbicidal Activity  
 Abstract    Nitrodipheny lethers, Herbicides Nitrodiphenylethers are new herbicides with high activity. Methods for the synthesis of these compounds are reviewed. 
  Reference    Z. Naturforsch. 35b, 902—908 (1980); eingegangen am 7. Dezember 1979 
  Published    1980 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0902.pdf 
 Identifier    ZNB-1980-35b-0902 
 Volume    35 
192Author    H. Budzikiewicz, H. Scholl, W. Neuenhaus, G. Pulverer, H. KorthRequires cookie*
 Title    Dialkylresorcine aus Pseudomonas aureofaciens [1] Dialkyl Resorcinols from Pseudomonas aureofaciens [1]  
 Abstract    Pseudomonas aureofaciens, Dialkyl Resorcinols 2-n-Hexyl-5-n-pentyl and 2-n-hexyl-5-n-heptyl resorcinol have been isolated from Pseudomonas aureofaciens. 
  Reference    Z. Naturforsch. 35b, 909—910 (1980); eingegangen am 15. Februar 1980 
  Published    1980 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0909.pdf 
 Identifier    ZNB-1980-35b-0909 
 Volume    35 
193Author    E. Wünsch, L. Moroder, M. Gemeiner, E. Jaeger, A. Ribet, L. Pradayrol, N. VaysseRequires cookie*
 Title    Totalsynthese yon Somatostatin-28 (Big-Somatostatin) Total Synthesis of Somatostatin-28 (Big Somatostatin)  
 Abstract    The total synthesis of the octacosapeptide corresponding to the proposed primary structure of porcine somatostatin-28, a possible precursor of somatostatin, is described. The primary structure of somatostatin-28 corresponds to that of somatostatin elongated at the N-terminus by a tetradecapeptide sequence. The synthesis has been performed using the strategy of overall acid labile side chain protection based on £er£-butanol and adamantol derived protecting groups in combination with the S-ter£-butylthio group for the reversible blocking of the cysteine thiol functions and the N a -2-nitrophenylsulfenyl group for the chain elongation steps. Upon assembly in sequence order of the four suitably protected fragments related to sequence 18-28, 15-17, 8-14 and 1-7, respectively, reductive cleavage of the S-tertf-butylthio groups from the fully protected octacosapeptide, followed by acidolytic deprotection via exposure to trifluoroacetic acid and subsequent air oxidation led to crude somatostatin-28. Purification by gel filtration on Biogel P6 and ion exchange chromatography on Biogel CM 2 produced the desired product in satisfactory yields and at a high degree of purity as judged from different analytical tests. The correctness of the proposed primary structure was ultimately proofed by comparative analysis of the synthetic and natural product by means of chromatographic, immunological and biological assays. 
  Reference    Z. Naturforsch. 35b, 911—919 (1980); eingegangen am 4. Juni 1980 
  Published    1980 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0911.pdf 
 Identifier    ZNB-1980-35b-0911 
 Volume    35 
194Author    Abdul Malik, Salimuzzaman Siddiqui, H.E J, Wolfgang VoelterRequires cookie*
 Title    A New Weak Base from Rauwolfia vomitoria Afzuelia  
 Abstract    Rauwolfia vomitoria Afzuelia, Neonorreserpine A new weak base from reserpine family has been isolated from Rauwolfia vomitoria Afzuelia and provisionally named as neonorreserpine. The chemical and spectral evidence established it as a distinct isomer of pseudoreserpine. 
  Reference    Z. Naturforsch. 35b, 920—923 (1980); received February 20 1980 
  Published    1980 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0920.pdf 
 Identifier    ZNB-1980-35b-0920 
 Volume    35 
195Author    Reinhard Nast, Axel BeyerRequires cookie*
 Title    2(Pet3) 2] Alkynyl Compounds of Transition Metals, XXXXI [1] Planar Complexes of the Type to5-[Pd(feCC6H4C=CH)2(Pet3)2]  
 Abstract    <rcms -Bis (1,2-ethynylphenylethynyl)-bis (tri ethy lphosphine)palladium (II), trans-Bis (1,4 -ethyny lpheny lethyny 1) -bis (triethy lphosphine)palladium (II) The diamagnetic trans-planar complexes [Pd(C = CR)a(Pets)a] (R = 1,2-C6H4C = CH, 1,4-C6H4C = CH; et — C2H5) are prepared according to the equation (1). The constitution and the structure of these compounds are demonstrated by their IR, *H and 31 P NMR spectra. 
  Reference    Z. Naturforsch. 35b, 924—925 (1980); eingegangen am 28. Februar 1980 
  Published    1980 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0924_n.pdf 
 Identifier    ZNB-1980-35b-0924_n 
 Volume    35 
196Author    P. W. Jolly, C. Krüger, K.-P Schick, G. WilkeRequires cookie*
 Title    The Structure of [r?3-C3H5PdP(C6H5)3] 2  
 Abstract    X-ray, Palladium-^ 3 -allyl Complex The 1:1 adduct formed by triphenylphosphine with bis(^ 3 -allyl)palladium disproportionates at 0 °C in toluene to give the title compound. A crystal structure determination confirms the presence of a Pd-Pd bond and bridging r/ 3 -allyl groups. 
  Reference    Z. Naturforsch. 35b, 926—928 (1980); received February 8 1980 
  Published    1980 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0926_n.pdf 
 Identifier    ZNB-1980-35b-0926_n 
 Volume    35 
197Author    Monika Kümpers, Robert SchöllhornRequires cookie*
 Title    Ternary Molybdenum Sulfides of the Heavy Alkali Metals  
 Abstract    Two series of ternary molybdenum sulfides, ASMO4S6 (A = K, Rb, Cs) and A2M015S20 (A = K, Rb), were prepared by reduction of molybdenum disulfide with alkali metals in alkali halide melts at 1100-1300 K. All com-pounds are hexagonal and show electronic conductivity; structural characteristics suggest isolated [Mo/S]^ chains as lattice elements for AzMo4S6. 
  Reference    Z. Naturforsch. 35b, 929—930 (1980); received April 1980 
  Published    1980 
  Keywords    Ternary, Molybdenum Sulfides, Molybdenum Disulfide 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0929_n.pdf 
 Identifier    ZNB-1980-35b-0929_n 
 Volume    35 
198Author    Claus-Dierk Hager, Friedo HuberRequires cookie*
 Title    (Hydroxyalkyl)-und (4-Hydroxyphenyl)- organoplumbylsulfide (Hydroxyalkyl)-and (4-Hydroxyphenyl)-organoplumbyl Sulfides  
  Reference    Z. Naturforsch. 35b, 931—933 (1980); eingegangen am 4. März 1980 
  Published    1980 
  Keywords    Organolead Thiocompounds, (Hydroxyalkyl)-organoplumbyl Sulfides, (4 -Hydroxy phenyl) -organoplumbv 1 Sulfides, Preparation, Redistribution 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0931_n.pdf 
 Identifier    ZNB-1980-35b-0931_n 
 Volume    35 
199Author    R. Radeglia, S. L. Spassov, R. Stefanova, S. D. SimovaRequires cookie*
 Title    Verschiebungen in para-substituierten 3-Phenylpropan8äure-methylestern The Transmission of Substituent-Induced 13 C NMR Chemical Shifts in para-Substituted 3-Phenyl Propanoic Acid Methyl Esters  
 Abstract    Carbon-13 chemical shifts have been measured of joara-substituted 3-phenyl propanoic acid methyl esters. The substituent-induced 13 C shifts of the side chain were related to Hammett substituent effects by the dual substituent para-meter method. The transmission of substituent effects and the factors that influence 13 C shifts are discussed. 
  Reference    Z. Naturforsch. 35b, 934—936 (1980); eingegangen am 14. Januar 1980 
  Published    1980 
  Keywords    Dual Substituent Parameters, Polar and Steric Interactions, Conformational Energy, 13 C NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0934_n.pdf 
 Identifier    ZNB-1980-35b-0934_n 
 Volume    35 
200Author    Ekkehard Lindner, Sigurd Hoehne, Jörg-Peter GumzRequires cookie*
 Title    Das Verhalten von Mono-und Diorganylphosphansulfiden gegenüber Metallcarbonylsy steinen, XXIII [1]  
 Abstract    Kristall-und Molekülstruktur von fi-[Oxybis(dimethylphosphan)] -bis[dicarbonyl(h 5 -cyclopentadienyl)-mangan(I)] The Behavior of Mono-and Diorganylphosphane Sulfides towards Metal Carbonyl Systems, XXIII [1] Crystal and Molecular Structure of //-[Oxybis(dimethylphosphane)]-bis [dicarbonyl (h 5 -cyclopentadienyl) -manganese(I)] X-ray, /z-Oxy Phosphane Complex Manganese [h5-C5H5(0C)2MnP(CH3)2]20 (1) which can be prepared from h5-C5H5(OC)2MnP(CH3)2Cl, H20 and N(C2Ü5)3, crystallizes monoclinicly in the space group P2i/c with two molecules in the unit cell. The crystal structure was refined to a fü-value of 0.055. 1 contains disordered bridging O atoms. 
  Reference    Z. Naturforsch. 35b, 937—938 (1980); eingegangen am 28. Januar/12. März 1980 
  Published    1980 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0937_n.pdf 
 Identifier    ZNB-1980-35b-0937_n 
 Volume    35 
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