Go toArchive
Browse byFacets
Bookbag ( 0 )
Facet   section ZfN Section B:Volume 033  [X]
Results  361 Items
Sorted by   
Publication Year
1978 (361)
61Author    Peter HofmannRequires cookie*
 Title    Das Tricarbonyl-eisen-cycloheptatrienid-Anion [C7H7Fe(CO)3] : r/ 3 -Allylanion-oder ^ 4 -Butadienkomplex ? The Triearbonyl Iron Cyeloheptatrienide Anion: r/ 3 -Allyl Anion or ^-Butadiene Complex ?  
 Abstract    Molecular orbital calculations for [C7H7Fe(CO)3]-predict a ^ 3 -allyl anion Fe(CO)3 com-plex with un-coordinated diene part of the C7H7 ligand to be more stable than the alter-native 7j 4 -butadiene Fe(CO)3 form, the cyclopolyenyl ligand being nonplanar in either case. The tiny energy difference between both coordination modes accounts for the observed high fluxionality of the anion. 
  Reference    Z. Naturforsch. 33b, 251—260 (1978); eingegangen am 19. Dezember 1977 
  Published    1978 
  Keywords    Triearbonyl Iron Cyeloheptatrienide, Fluxionality, Ground State Structure, Molecular Orbital Calculations 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0251.pdf 
 Identifier    ZNB-1978-33b-0251 
 Volume    33 
62Author    Erich Sepp, Albert Pürzer, Gerhard Thiele, Helmut BehrensRequires cookie*
 Title    Zur Struktur des Cycloheptatrienid-tricarbonyl-eisen(0)-Anions, [C7H7Fe(CO)3] The Structure of the Cyeloheptatrienide Triearbonyl Iron(O) Anion, [C7H7Fe(CO)3]~  
 Abstract    The crystal structure of the [C7H7Fe(CO)3] _ anion stabilized with the [(CeHs^As]" 1 " cation has been determinated by X-ray diffraction. The crystals are monoclinic, space group P2i/n. The unit cell with lattice constants a = 1607.9 pm, b = 1386.8 pm, c = 1249.1 pm and ß — 91.52° includes four formula units. The Fe(CO)3 group is bonded to the allyl anion part of the C7H7 ring system, while the diene part is unco-ordinated. 
  Reference    Z. Naturforsch. 33b, 261—264 (1978); eingegangen am 19. Dezember 1977 
  Published    1978 
  Keywords    Cyeloheptatrienide Anion, Iron Carbonyl Derivate, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0261.pdf 
 Identifier    ZNB-1978-33b-0261 
 Volume    33 
63Author    Bernhard Nuber, Johannes Weiss, Karl WieghardtRequires cookie*
 Title    Schwingungsspektrum und Kristallstruktur des fünffach-koordinierten cis-Dioxo-dipicolinato-vanadat(V)-Anions Vibrational Spectrum and Crystal Structure of the cis-Dioxo-dipicolinato-vanadium(V) Anion  
 Abstract    The crystal structure of Cs[V(0)2(dipic)] • H20 (dipic = pyridine-2,6-dicarboxylate) has been determined by single crystal x-ray diffraction analysis. The compound crystallizes in the monoclinic space group P2i/a, with cell constants a =737.8(3), 6=1917.5(5), c = 792.9(3) pm, ß= 94.87(6)°, and Z = 4. The geometry about vanadium is a distorted trigonal bipyramid containing a cis-dioxo moiety (-$ O-V-O 109.9(3)°, V = O bond lengths 161.0(6) and 161.5(6) pm). Vibrational absorptions vs(V — 0) and vas(V — O) were found at 956 and 947 cm -1 in the IR and Raman spectrum, resp. 
  Reference    Z. Naturforsch. 33b, 265—267 (1978); eingegangen am 30. Dezember 1977 
  Published    1978 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0265.pdf 
 Identifier    ZNB-1978-33b-0265 
 Volume    33 
64Author    V. Propach, F. SteffensRequires cookie*
 Title    Über die Strukturen der CuZrFe -Modifikationen - Neutronenbeugungsuntersuchungen an den Kristallpulvern A Neutron Diffraction Study on the Modifications of CuZrFe  
 Abstract    The structures of two modifications ofCuZrFe by means of neutron diffraction on powder samples in the temperature range from 298-560 K are reported. All modifications consist of octahedra, which share corners in three dimensions and which are centered alternately by Cu 2+ or Zr 4 " 1 ". The high temperature a-modification crystallizes in space group Fm3 (No. 202) with a = 7.939 A. There is experimental evidence, that the CuFe-octahedra are distorted by a static Jahn-Teller-effect. The space group P1 (No. 2) with Z = 2 is proposed for the low-temperature y-modification. 
  Reference    Z. Naturforsch. 33b, 268—274 (1978); eingegangen am 4. November 1977 Neutron Diffraction Study 
  Published    1978 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0268.pdf 
 Identifier    ZNB-1978-33b-0268 
 Volume    33 
65Author    Wiking Midler, Klaus VolkRequires cookie*
 Title    Die Strukturen der Phasen Na9Sn4 und Na15Sn4 The Structures of the Phases NagSru and NaisSiu  
 Abstract    The crystal structures of NagSn4 and NaisSiLj have been determined. NagSnj crystal-lizes orthorhombic, a— 542 ±1, b = 939 ±2, c = 2962 ± 6 pm, isotypic with LigGe4. Nai5Sn4 crystallizes cubic, a = 1314 ± 2 pm, isotypic with NaisPb4 (CuisSi4-type). The structural relationship of NagSr^i to the variants of the W-Structure type is shown. Einführung 
  Reference    Z. Naturforsch. 33b, 275—278 (1978); eingegangen am 30. Dezember 1977 
  Published    1978 
  Keywords    Sodium Stannide, W-Type, Intermetallic Compounds 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0275.pdf 
 Identifier    ZNB-1978-33b-0275 
 Volume    33 
66Author    Jürgen0. BesenhardRequires cookie*
 Title    Chalkogenide des As, Sb und Bi als positive Elektroden in Lithium-Batterien Chalcogenides of As, Sb and Bi as Positive Electrodes in Lithium Cells  
 Abstract    Redox properties of layer type chalcogenides of main group V elements were investigated in molten salt and organic Li+-electrolytes. Even at room temperature, Bi2S3, Bi2Se3 and Bi2Te3 can be reduced with about 100% material efficiency to LißBi as final product. The reduction of Bi2S3 to Bi° and Li2S can be reversed in organic electrolytes. 
  Reference    Z. Naturforsch. 33b, 279—283 (1978); eingegangen am 13. Januar 1978 
  Published    1978 
  Keywords    Lithium Cells, Secondary Cathodes, Main Group V Chalcogenides, Molten Salt Electrolytes, Organic Electrolytes 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0279.pdf 
 Identifier    ZNB-1978-33b-0279 
 Volume    33 
67Author    Bahman Solouki, Hans Bock, Oskar GlemserRequires cookie*
 Title    Photoelectron Spectra and Molecular Properties, LXIX [1,2] Molecules with S—N Multiple Bonds  
 Abstract    The He(I) photoelectron spectra of the following molecules with S—N multiple bonds S=N /-N. 4 ,h O R=CH3/CF3/Ct n = 2,3 are assigned by radical cation state comparison between the chemically related compounds as well as by MO models based on CNDO calculations. From the ionisation energies of the 0 = S = 0/HN = S = 0 pair a parameter OSN can be deduced, which proves to be useful in the discussion of other SN compounds like R3C-N=S = 0 and RN = S = NR. 
  Reference    Z. Naturforsch. 33b, 284—290 (1978); eingegangen am 8. September 1977 
  Published    1978 
  Keywords    PE Spectra, MO Interpretation, Molecules with S—N Bonds 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0284.pdf 
 Identifier    ZNB-1978-33b-0284 
 Volume    33 
68Author    B. L. Chandwani, G. D. MenghaniRequires cookie*
 Title    Oxidation of Mandelic Acid by Os(VIII)  
 Abstract    In the reaction between mandelic acid and Os(VTII), the rate of Os(VIII) disappearance was found to be proportional to the concentration of mandelate ion and Os(VIII). At low and high hydroxyl ion concentration the rate shows second and zero order dependence respectively. The reaction was studied at different temperatures and various activation parameters ZlE, PZ, ZlS* etc. were evaluated. 
  Reference    Z. Naturforsch. 33b, 291—292 (1978); received September 29 1976/August 26/December 2 1977 
  Published    1978 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0291.pdf 
 Identifier    ZNB-1978-33b-0291 
 Volume    33 
69Author    Joachim Staufif, Wolfgang JaeschkeRequires cookie*
 Title    Chemilumineszenz der S02-Oxidation Chemiluminescence of SO2-Oxidation  
 Abstract    The reactions of diluted aqueous solutions of SO2 resp. HSO3-ions with MJ1O4-or Ce 4+ ions in the pH range 1-4 produce chemiluminescence in the spectral region of 450-600 nm. Measurements of the time course of the light emission and their simulation on an analog computer led to a reaction scheme in which a recombination product of primarily formed HSO3 radicals -of a lifetime of about 1 second -appears as precursor of electronically excited SO2 molecules. The participation of singlet oxygen can be excluded because at least the reaction with Ce 4+ ions proceeds also in the absence of oxygen. 
  Reference    Z. Naturforsch. 33b, 293—299 (1978); eingegangen am 30. September/12. Dezember 1977 
  Published    1978 
  Keywords    Sulfur Dioxide, Oxidation, Chemiluminescence, Reaction Kinetics, Analysis 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0293.pdf 
 Identifier    ZNB-1978-33b-0293 
 Volume    33 
70Author    Diec-Lang Wagner, Hartmut Wagner, Oskar GlemserRequires cookie*
 Title    Die Alkoholyse von 3.5-Difluor  
 Abstract    1.1.3.5-tetraoxo-2-alkyl-lA«.3A«.5A«.2.4.6-trithiatriazin The Alcoholysis Reaction of 3,5-Difluoro-l,l,3,5-tetraoxo-2-alkyl-l A 6 ,3A 6 ,5A 6 ,2,4,6-trithiatriazin Alcoholysis, Trithiatriazine, Reaction Mechanism, 19 F NMR (NS0F)2(CHsNS02) 2 a reacts with methanol to give sulfuric acid, aminosulfuric acid and S02(NHCH3)2 as final products. The primary reaction was studied by 1 H and 19 F NMR spectroscopy. A 1: 1 adduct 2 a • CH3OH (= 3) and a monosubstituted product which has the formula (NS0F)(NS00CH3)(CH3NS02) 4 were detected to be intermediates. As 2 a is chiral, the reaction with racemic butanol-2 proceeds via diastereomeric inter-mediates which were identified by their 19 F NMR spectrum. The reaction pattern of 2 a is explained. 
  Reference    Z. Naturforsch. 33b, 300—304 (1978); eingegangen am 2. Dezember 1977 
  Published    1978 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0300.pdf 
 Identifier    ZNB-1978-33b-0300 
 Volume    33 
71Author    Werner Storzer, Gerd-Volker RöschenthalerRequires cookie*
 Title    Spin-Labeled Cyclic Oxyphosphoranes 4-Oxy-l-oxyl-2,2,6,6-tetramethylpiperidine  
 Abstract    Spin-Labeled Cyclic Oxyphosphoranes, Nitroxyls, Biacetyl, Hexafluoroacetone Several spin-labeled oxyphosphoranes have been prepared by oxydative addition of biacetyl and hexafluoroacetone to phosphites containing the 4-oxy-l-oxyl-2,2,6,6-tetra-methylpiperidine group. The new compounds have been characterised by ESR and 31 P NMR spectroscopy eis well as by mass spectra. 
  Reference    Z. Naturforsch. 33b, 305—310 (1978); eingegangen am 19. Dezember 1977 
  Published    1978 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0305.pdf 
 Identifier    ZNB-1978-33b-0305 
 Volume    33 
72Author    Gerd-Volker RöschenthalerRequires cookie*
 Title    The Insertion of Hexafluoroacetone into P-H Bonds of Phosphanes MenPH3_n  
  Reference    Z. Naturforsch. 33b, 311—315 (1978); eingegangen am 12. Dezember 1977/19. Januar 1978 
  Published    1978 
  Keywords    2-Hydroxy-l, l, l, 3, 3, 3-hexafluoroisopropyl-phosphanes, Hexafluoroacetone, Bis( 1, 1, 1, 3, 3, 3-hexafluoroisopropoxy )dimethylfluorophosphorane 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0311.pdf 
 Identifier    ZNB-1978-33b-0311 
 Volume    33 
73Author    Werner Winter, Udo Plücken, Herbert MeierRequires cookie*
 Title    332 W. Winter et al. * Kristall-und Molekül-Struktur von 4-Phenyl-1.2.3-thiadiazol-3-oxid Crystal and Molecular Structure of 4-Phenyl-l,2,3-thiadiazol-3-oxide  
 Abstract    A final decision between the 2-and 3-oxide structure of the thermally or photo-chemically accessible monoxides of 1,2,3-thiadiazoles is given with the aid of an X-ray analysis of 4-phenyl-l,2,3-thiadiazole-3-oxide. The compound crystallizes in the ortho-rhombic space group Pbca, Z = 8, with a = 7.598(6), b= 18.865(5) and c= 11.225(6) Ä. The structure was solved by the heavy atom method and refined to R = 0.042 for 1643 independent reflections. The heterocyclic ring is planar within experimental error and the bond distances S-C and S-N are rather short. In the crystal the molecules are linked by an unusual short contact distance between sulphur and oxygen (2.75 A). 
  Reference    Z. Naturforsch. 33b, 316—320 (1978); eingegangen am 7. Dezember 1977 
  Published    1978 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0316.pdf 
 Identifier    ZNB-1978-33b-0316 
 Volume    33 
74Author    Alfred Hissung, Clemens Von SonntagRequires cookie*
 Title    Radiolysis of Cytosine, 5-Methyl Cytosine and 2'-Deoxycytidine in Deoxygenated Aqueous Solution A Pulse Spectroscopic and Pulse Conductometric Study of the OH Adduct  
 Abstract    Using the pulse radiolysis technique the OH adducts of cytosine, 5-methyl cytosine and 2'-deoxycytidine were investigated in alkaline N20 saturated aqueous solutions. Ab-sorption spectra were recorded and their change with time was correlated with the change in conductivity. An OH -induced reaction (1.4 • 10 8 1 • mol -1 • s -1) was observed with OH adducts of cytosine and 5-methyl cytosine leading to radicals (pK = 10.3), the G-values of which were 3.2 and 1.6 respectively (conductivity measurements). These intermediates were assigned to the C-5 OH radical adducts. After completion of the free radical reactions (2k = 6 • 10 8 1 • mol -1 • s -1) the resulting product mixture showed pK-values of 8.3 (cytosine, G = 0.6), 10.5 (5-methyl cytosine, G = 0.8), 10.7 (cytosine, G=1.5; 2'-deoxycytidine, G=1.5) and 12.4 (cytosine, no G-value, determinable with optical detection). Ammonia, which is a product measured after y-radiolysis of all the three compounds investigated (G(NHs) = 0.6 ± 0.1), is not released within 15 ms after the pulse. 
  Reference    Z. Naturforsch. 33b, 321—328 (1978); received November 25 1977 
  Published    1978 
  Keywords    Cytosine, G-Values, pK-Values, Absorption Spectra, Pulse Radiolysis 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0321.pdf 
 Identifier    ZNB-1978-33b-0321 
 Volume    33 
75Author    Nien Man, Clemens Schuchmann, Von SonntagRequires cookie*
 Title    Free Radical Induced Oxidation of Neutral Aqueous Solutions of D-Glucose in the Presence of Oxygen -a Non-Chain Process  
 Abstract    Oxygenated 1 M aqueous solutions of 2-methyltetrahydrofuran (MTHF) or D-glucose were y-irradiated, and G(total peroxide) was determined as a function of dose rate and temperature. Whereas MTHF was oxidized by a chain process, D-glucose was not. The peroxyl radicals derived from D-glucose rapidly eliminate H02". At natural pH H02' (pK = 4.75) is largely deprotonated. O2— does not propagate a chain. 
  Reference    Z. Naturforsch. 33b, 329—331 (1978); received November 25 1977 
  Published    1978 
  Keywords    Autoxidation, D-Glucose, 2-Methyltetrahydrofuran, a-Hydroxyalkylperoxyl Radicals, y-Irradiation 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0329.pdf 
 Identifier    ZNB-1978-33b-0329 
 Volume    33 
76Author    Walter FabianRequires cookie*
 Title    W. Fabian * Eigenschaften von Molekülen in angeregten Zuständen 348 Properties of Molecules in Excited States  
 Abstract    Using bisisochinolin derivatives and related compounds it is shown that information about the fluorescent state can be obtained by comparison of experimental fluorescence data and calculated energies of the Si-state assuming various geometries. 
  Reference    Z. Naturforsch. 33b, 332—335 (1978); eingegangen am 7. September 1977 
  Published    1978 
  Keywords    Excited States, Fluorescence, PPP-Calculations, Phototautomerism, Bisisochinolin Deri-vatives 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0332.pdf 
 Identifier    ZNB-1978-33b-0332 
 Volume    33 
77Author    M. Mittal, R. L. MitalRequires cookie*
 Title    Synthesis of Some 7,8-Disubstituted 2-Trifluoromethyl Phenothiazines and their Sulphoxides  
 Abstract    2-Trifluoromethyl Phenothiazines, Sulphoxides 2-Chloro-5-methoxy-p-benzoquinone [1] reacts with zinc mercaptide [2] to give 2-tri-fluoromethyl-8-methoxy phenothiazin-7-one (1), which on reduction with sodium di-thionite provided 2-trifluoromethyl-8-methoxy phenothiazin-7-ol. Synthesis of various acylated and alkylated derivatives (3 to 6) and their sulphoxides (7 to 8) have been described (Scheme 1). 
  Reference    Z. Naturforsch. 33b, 336—338 (1978); received October 12 1977 
  Published    1978 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0336.pdf 
 Identifier    ZNB-1978-33b-0336 
 Volume    33 
78Author    EdwardW. Abel, StuartA. Mucklejohn, T.Stanley Cameron, RuthE. CordesRequires cookie*
 Title    The Dimeric Phosphinimine Complex [CdI2(HN: PPh3)2]2 Containing N-H --I Hydrogen Bonds  
  Reference    Z. Naturforsch. 33b, 339—340 (1978); received December 5 1977 
  Published    1978 
  Keywords    X-ray, Crystal Structure, Phosphinimine 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0339_n.pdf 
 Identifier    ZNB-1978-33b-0339_n 
 Volume    33 
79Author    Ekkehard Lindner, Ulrich AnsorgeRequires cookie*
 Title    Tri-und Tetraseleninato-Komplexe von Zinn Tri-and Tetraseleninato Complexes of Tin  
 Abstract    Two tri-and tetraseleninato complexes of tin, RSn(02SeR)3 (1) and Sn(02SeR)4 (2) (R =C6H5), are obtained from trichlorophenyltin and tetra-chlorotin ,resp. with sodium benzeneseleninate. On the basis of the IR and Raman spectra 1 and 2 probably are polymeric mixed seleninato-0,0'-seleninato-0 complexes (c.n. = 6). 
  Reference    Z. Naturforsch. 33b, 341—342 (1978); eingegangen am 30. Dezember 1977 
  Published    1978 
  Keywords    Polymerie Seleninato Complexes, Tin, IR, Raman 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0341_n.pdf 
 Identifier    ZNB-1978-33b-0341_n 
 Volume    33 
80Author    Y. Anghelova, S. Spirova, V. MichaylovaRequires cookie*
 Title    3-(2,2-Diarylviny 1)-2-benzo [b] furan- carboxylic, and 2-Styryl-and 2-(2,2-Diarylvinyl)-5-methyl-3-furan- car boxy lie Acids  
 Abstract    Dissociation Constant, 3-Styryl-2-benzo[b]furancarboxylic Acids 3 -(2,2 -Diary 1 vinyl) -2 -benzo[b]furancarboxy lie Acids 
  Reference    Z. Naturforsch. 33b, 343—345 (1978); received December 19 1977 
  Published    1978 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0343_n.pdf 
 Identifier    ZNB-1978-33b-0343_n 
 Volume    33 
Prev
1
2
3
4
5
...
Next