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Facet   section ZfN Section B:Volume 030  [X]
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1975 (239)
121Author    C.Requires cookie*
 Title    Über den Mechanismus und die Kinetik der Methan-und Ammoniakzersetzung im kalten Plasma The Mechanism and Kinetics of Methane and Ammonia Decomposition in Cold Plasma  
 Abstract    r . S i m i o n e s c u , S. D u m i t r i u , V. B u l a c o v s c h i und D . O n a c Technische Hochschule, Jassy, Rumänien 
  Reference    (Z. Naturforsch. 30b, 516 [1975]) 
  Published    1975 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0516.pdf 
 Identifier    ZNB-1975-30b-0516 
 Volume    30 
122Author    Requires cookie*
 Title      
 Abstract    nE-Verbindungen (E = P, As) von Elementen der IV. Hauptgruppe (CF3)wE Compounds (E = P, A s) o f Main Group I V Elements S a l m a n A n s a r i und J o s e p h G r o b e Transphosphination reactions of (Me3 M)3 P and Me3 M PH 2 compounds (M = Si, Ge, Sn; Me = CH3) using HE(CF3)2 or H 2 ECF3 (E = P, As) yield derivatives of the types Me3 ME(CF3)2, Me3 ME(H)CF3, and (Me3 M)2 ECF3, respectively. The reactivity of the different systems depends on M (Si < Ge < Sn), E (P < As), and the phosphine [Me3 M PH 2 < (Me3 M)2 PH < (Me3 M)3 P]. Me3 M E(H)CF3 compounds undergo dismutation forming (Me3 M)2 ECF3 and H 2 ECF3. Reactions of the new derivatives with polar com­ pounds (HBr, H 2 E'CF3, Me3 M'Br) result in cleavage of the M -E bond. Decomposition of the CF3 E derivatives occurs by /^-elimination of fluorine yielding Me3 MF besides polymers of unknown structure. 
  Reference    (Z. Naturforsch. 30b, 523—530 [1975]; eingegangen am 25. März/25. April 1975) 
  Published    1975 
  Keywords    Trifluoromethyl Element Compounds, Silylphosphines, Germylphosphines, Stannyl-phosphines, NM R 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0523.pdf 
 Identifier    ZNB-1975-30b-0523 
 Volume    30 
123Author    Requires cookie*
 Title    Organozinnverbindungen als Reagenzien, II1 Neue Synthese von CF3E-Verbindungen des Zinns (E = P , As)2  
 Abstract    Organotin Compounds as Reagents, I I : New Synthesis of CF3E Compounds of Tin (E = P, As) Sa l m a n A n s a r i u n d J o s e p h G r o b e The organotin compounds Me3SnE(CF3)2, Me3SnE(H)CF3 and (Me3Sn)2 ECF3 (Me = CH3, E = P, A s) are obtained in good yield by the reaction of E 2(CF3)4 and (CF3 E)W (n = 4,5), respectively, with trimethylstannane. 
  Reference    (Z. Naturforsch. 30b, 531—534 [1975]; eingegangen am 14./27. Mai 1975) 
  Published    1975 
  Keywords    Organotin Compounds, Trifluoromethyl Element Compounds, Stannylphosphines, Stannylarsines 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0531.pdf 
 Identifier    ZNB-1975-30b-0531 
 Volume    30 
124Author    Requires cookie*
 Title    Kristallisierte Koordinationsverbindungen von 1.2-Benzochinon- dioximen mit den Metall-Ionen Ni(II), Pd(II) und Cu(II): Festkörper mit Metall-Metall-Wechselwirkungen  
 Abstract    Crystallized Coordination Compounds o f 1,2-Benzoquinonedioximes with the Metal Ions N i(II), P d (II) and P t (I I) : Solids with Metal-Metal Interactions H. E n d u e s , H. J. K e l l e r , M . M e g n a m i s i -B e l o m b e und D. N ö t h e Linear Metal Complexes, Intermolecular Interactions Metal complexes obtained by reacting various 1,2-benzoquinonedioximes with metal salts of Ni(II), Pd(II), Pt(II) and Cu(II) show evidence of considerable metal-metal interactions. In the diamagnetic Pd(II) and P t(II) derivatives the intermolecular in­ teractions are accomplished by direct metal-metal contacts, which are heavily influenced by different substituents on the 1,2-benzoquinonedioxime (BCDH) moiety as evidenced by their optical behaviour. The unpaired electrons of the paramagnetic copper(II) species interact via ligand atoms in dinuclear clusters or linear chain polymers. The former solids crystallize with stoichiometry [Cu(BCD)2] 2 while the latter compounds have the composition CuCl2 • BCDH. 
  Reference    (Z. Naturforsch. 30b, 535—538 [1975]; eingegangen am 1. April 1975) 
  Published    1975 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0535.pdf 
 Identifier    ZNB-1975-30b-0535 
 Volume    30 
125Author    Requires cookie*
 Title    Perfluormethyl-Element-Liganden, XI1 Die Schwingungsspektren von (CF3)2EMn(CO)5 (E = P , As)  
 Abstract    Pernuorom ethyl Elem ent Ligands, X I 1 V ibrational Spectra o f (CF3)2EM n(CO)5 (E = P, As) R e i n h a r d D e m u t h J o s e p h G r o b e u n d R o b e r t R a u The gas phase IR and liquid phase IR and Raman spectra of (CF3)2 PMn(CO)s and (CF3)2 AsMn(CO)5 have been recorded. The spectra are assigned on the basis of a normal coordinate analysis using a transferred force field. 
  Reference    (Z. Naturforsch. 30b, 539—543 [1975]; eingegangen am 10. April 1975) 
  Published    1975 
  Keywords    Carbonyl Derivatives, Vibrational Spectra, Liquid Phase 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0539.pdf 
 Identifier    ZNB-1975-30b-0539 
 Volume    30 
126Author    Requires cookie*
 Title    Darstellung und spektroskopische Eigenschaften von planaren Dipseudohalogeno-bis(phosphin)-platin(II)-Kom plexen1 Preparation and Spectroscopic Properties of Planar Dipseudohalogeno-bis(phosphine)-platinum(II) Complexes  
 Abstract    P e t e r H. K r e u t z e r , K a r l T. S c h o r p p u n d W o l f g a n g B e c k Diazido-bis(phosphine)-platinum(II 
  Reference    (Z. Naturforsch. 30b, 544—549 [1975]; eingegangen am 13. Mai 1975) 
  Published    1975 
  Keywords    ) Complexes, 14N NMR Spectra, Pseudohalogeno-bis(phosphine) Complexes, 31P NMR Spectra, IR Spectra 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0544.pdf 
 Identifier    ZNB-1975-30b-0544 
 Volume    30 
127Author    Requires cookie*
 Title    Beschreibung der Richtung des elektrischen Dipolmomentvektors u durch Slater-Orbitalexponenten The Direction of the Electric Dipole Moment Vector ^ as Inferred from Slater Orbital Exponents  
 Abstract    Permanent Electric Dipole Moment, Slater Orbital Exponents B y means of Slater orbital exponents it is possible to differentiate between the positive and the negative end of the permanent electric dipole of diatomic heteronuclear molecules. Thus Slater orbital exponents hold a clue to the direction of the electric dipole moment vector Ji of the molecular ground state. A comparison with electron population analysis is made. 
  Reference    (Z. Naturforsch. 30b, 550—553 [1975]; eingegangen am 21. Januar/27. Mai 1975) 
  Published    1975 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0550.pdf 
 Identifier    ZNB-1975-30b-0550 
 Volume    30 
128Author    H., K. K. O SkRequires cookie*
 Title    On the Molecular Motion in the Orthorhombic Solid Acetylene-d2  
 Abstract    Molecular Motion, Acetylene-d2, Organic Crystals The mean square thermal displacements of the carbon and deuterium atoms in crystalline orthorhombic acetylene-d2, C2D 2, derived from earlier thermal neutron powder diffraction studies were interpreted as rigid-body translational and librational motions of the C2D 2 molecule. An attempt to assign the derived amplitudes of the angular vibrations to the Raman-active rotational lattice modes was not unambiguous. Finally, a calculation was made to correct the apparent shortening in the bond lengths and the molecular dimension. 
  Reference    (Z. Naturforsch. 30b, 554—560 [1975]; received April 14 1975) 
  Published    1975 
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 Identifier    ZNB-1975-30b-0554 
 Volume    30 
129Author    Requires cookie*
 Title    Reaktionskinetische Untersuchungen zur Bildung von Carbeniumionen des Triphenylmethyl-Typs K inetic Investigations of the Form ation of Carbenium Ions of the Triphenylmethyl Type  
 Abstract    M a t t h i a s W a l p e r , H a n s -D i e t e r B r a u e r u n d H a r t w ig K e l m The rates of formation of three mono-and three dicarbenium ions of the triphenyl m ethyl type from the corresponding carbinols in trifluoro acetic acid -toluene mixtures were investigated using stopped flow techniques. The reaction mechanisms are discussed in view of the obtained dependencies of the rate constants on acid concentration and temperature. 
  Reference    (Z. Naturforsch. 30b, 561—565 [1975]; eingegangen am 12. Mai 1975) 
  Published    1975 
  Keywords    Carbenium Ions, Triphenylmethyl Ions, Kinetics 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0561.pdf 
 Identifier    ZNB-1975-30b-0561 
 Volume    30 
130Author    Requires cookie*
 Title    Komplexchemie polyfunktioneller Liganden, XXXIV1 Direkte Synthese und Derivate von Co2(CO)6(R 2ECH2CH2ER2) (E — P, A s; R = C6H5)  
 Abstract    Complex Chemistry of Polyfunctional Ligands, X X X IV 1 Direct Synthesis and D erivatives of Co2(CO)6(R 2EC H 2CH 2E R 2) (E = P, As; R —C6H 5) J o c h e n E l l e r m a n n und N o r b e r t G e h e e b Octacarbonyldicobalt reacts with the ditertiary phosphine and arsine (C6H 5)2-ECH2CH2E(C6H 6)2 (E = P, As) in a direct route to give prim arily the non CO-bridged, but ligand-bridged complexes Co2(CO)6(C6H 5)2ECH2CH2E(C6H 5)2. From Co2(CO)6-(C6H 5)2PCH2CH2P(C6H 5)2 secondarily a CO-bridged isomer has been also isolated. The non-CO-bridged form of Co2(CO)6(C6H 5)2PCH2CH2P(C6H 5)2 gives insertion reactions with Hg, SnCl2 and CsGeCl3 yielding the probably oligo-or polymeric compounds Hg[Co(CO)3]2(C6H s)2PCH2CH2P(C6H 5)2 and Cl2M[Co(CO)3]2(C6H 5)2PCH2CH2P(C6H 8)2 (M = Sn, Ge). The characteristic IR absorptions of all compounds and some Raman spectra are reported. 
  Reference    (Z. Naturforsch. 30b, 566—574 [1975]; eingegangen am 20. Mai 1975) 
  Published    1975 
  Keywords    Cobaltcarbonyl Derivatives, Ditertiary Phosphines, Ditertiary Arsines, Insertion Reactions, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0566.pdf 
 Identifier    ZNB-1975-30b-0566 
 Volume    30 
131Author    J., A. V.Requires cookie*
 Title    Die Komplexbildung der Zitronensäure, II Komplexbildung zwischen Zitronensäure und E isen(III) The Form ation of Complexes of Citric Acid, I I The Form ation of Complexes of Citric Acid with Iron(III)  
 Abstract    Complex Formation, Fe(III) Citrate, Potentiometrie Determination, Mathematical Analysis Mixtures of citric acid (H3Ci) and F e (N 0 3)3 with variable molar ratios (H3C i/Fe(N 03)3 from 0 to 2.55) were titrated with NaOH. The change in pH and the occurring inflection points were registered with a potentiograph (Fig. 1). For each inflection point (I.P.) the existing H 3C i/Fe(N 03)3 molar ratio was plotted against the N a 0 H /F e (N 0 3)3 molar ratio which existed at the corresponding inflection point (at most three I.P . for each titration curve). The coefficients ej, fj and gj for each dehydrated 
  Reference    (Z. Naturforsch. 30b, 575—581 [1975]; eingegangen am 15. Mai 1975) 
  Published    1975 
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 Identifier    ZNB-1975-30b-0575 
 Volume    30 
132Author    OskarE. Polansky, LewisRequires cookie*
 Title    Zur Kenntnis organischer Lewissäuren, 31 Die Lewissäureeigenschaft einiger Barbitursäurederivate * On Organic Lewis Acids, 31 Lewis Acid Properties of Some B arbiturates  
 Abstract    Arylidenbarbituric acids (4) and arylidendimethylbarbituric acids (5) are compounds w ith a polarized C = C-double bond, and hence are electrically neutral lewis acids. There­ fore they are able to add bases. The measured UV spectra show a characteristic dependence on the pH value. pK values are reported. 
  Reference    (Z. Naturforsch. 30b, 582—586 [1975]; eingegangen am 11. März 1975) 
  Published    1975 
  Keywords    Acid, Arylidenbarbituric Acid, Arylidendimethylbarbituric Acid, UV Spectra, pK Values 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0582.pdf 
 Identifier    ZNB-1975-30b-0582 
 Volume    30 
133Author    V.K J OshiRequires cookie*
 Title    Dielectric Polarisation of Pyridine  
 Abstract    Dielectric Polarisation, Pyridine This paper deals with the study of dielectric polarisation of pyridine at 35 °C in four non polar solvents namely benzene, carbon tetrachloride, dioxan and cyclohexane. The results have been discussed to understand the merits of P a l i t 1 equation. It is observed that the moment value //s obtained by this is fairly comparable with that calculated by the method of H a l v e r s t a d t and K u m l e r 2. The order of apparent dipole moment has been discussed in terms of influence of solvent and solute-solvent interaction as well. 
  Reference    (Z. Naturforsch. 30b, 587—590 [1975]; received December 19 1974/February 25 1975) 
  Published    1975 
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 Identifier    ZNB-1975-30b-0587 
 Volume    30 
134Author    Y. S., W. F.Requires cookie*
 Title    Untersuchung der Konformation bicyclischer Imidderivate mit Hilfe der 270 MHz NMR- Spektroskopie Study of the Conformation of Bicyclic Imide Derivatives with 270 MHz NMR Spectroscopy  
 Abstract    The stable conformation of l-azabicyclo[3,3,0]octane-2,8-dione (1), 2,8-biscyano-methylen-l-azabicyclo[3,3,0]octane (2) and 2-oxo-8-ethoxycarbonylmethylen-l-azabi-cyclo[3,3,0]octane (3) was obtained by analysis of the 270 MHz PMR spectra. The results are correlated with force field calculations. 
  Reference    (Z. Naturforsch. 30b, 591—599 [1975]; eingegangen am 4. Oktober 1974) 
  Published    1975 
  Keywords    Imides, Proton Magnetic Resonance, Karplus Eq, Force Field 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0591.pdf 
 Identifier    ZNB-1975-30b-0591 
 Volume    30 
135Author    D. G. O ', L. IvRequires cookie*
 Title    Synthesis and X H NMR Spectra of Thiophenoyl-, Furoyl-and Pyrroylureas w ith Antiviral Properties  
 Abstract    Heterocyclic Carbonylureas, JH NMR, Virus Inhibitors N-(2-Thiophenoyl)urea, its 5-chloro and 5-methyl derivatives, N-ethyl-N'-(2-thio-phenoyl)urea, N-phenyl-N'-(5-methyl-2-thiophenoyl)urea, N-(2-furanoyl)urea, N -(l-methyl-2-pyrroyl)urea and 5-methyl-2-thiophene-carboxamide have been prepared. The JH NMR spectra of the ureides have been analysed. These ureides show antiviral activ ity 
  Reference    (Z. Naturforsch. 30b, 600—602 [1975]; received October 18 1974) 
  Published    1975 
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 Identifier    ZNB-1975-30b-0600 
 Volume    30 
136Author    Requires cookie*
 Title    Cleavage Reactions o f 5-Arylazo Derivatives o f l-M ethyl-2-benzyl-2-im idazolin-4-ones  
 Abstract    N azm i A b d e l L a t if K a s s a b , A b d e l H a m id H a k h a s h , and S a n n a O sm a n A b d A lla h The 5-arylazo-l-methyl-2-benzyl-2-imidazolin-4-ones (la-c) undergo ring cleavage 
  Reference    (Z. Naturforsch. 30b, 603—605 [1975]; received March 10 1975) 
  Published    1975 
  Keywords    Rearrangement Reaction, 1, 2, 4-Triazinones, Grignard Reaction 
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 Identifier    ZNB-1975-30b-0603 
 Volume    30 
137Author    H.A B L, D.E ERequires cookie*
 Title    Facile Synthesis of the Chalcones and Dihydrochalcones from Naringin, Neohesperidin and Hesperidin  
 Abstract    The flavanone glycosides naringin, neohesperidin and hesperidin were converted chemically to the corresponding chalcones and dihydrochalcones; the one-step synthesis, performed at room temperature, required the presence of 25% K O H in the reaction mixture for the former and 10% K O H , a catalyst and molecular hydrogen at atmospheric pressure for the latter. 
  Reference    (Z. Naturforsch. 30b, 606—608 [1975]; received April 1 1975) 
  Published    1975 
  Keywords    Dihydrochalcones, Sweeteners, Flavanone Glycosides, U V Spectra, Hydrogenation 
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 Identifier    ZNB-1975-30b-0606 
 Volume    30 
138Author    Requires cookie*
 Title    Radiation Chemistry of D N A -Model Compounds, V III * Dephosphorylation Products from Reactions of OH Radicals with Ribose-5-phosphate in  
 Abstract    Aqueous Solution. The Effect of Oxygen L o t h a r S t e l t e r , C le m e n s v o n S o n n t a g , an d D i e t r i c h S c h u l t e -F r o h l i n d e D N A Model Compound, Ribose-5-phosphate, y-Radiolysis, Dephosphorylation, Ribosyl-5-phosphate Radicals, Oxygen Effect The reaction of hydroxyl radicals with ribose-5-phosphate in oxygenated aqueous solution leads to the following phosphate free products (G-values): Erythrodialdose (0.4), formic acid (0.4) and ribodialdose (0.1). In addition, inorganic phosphate (0.6) and some minor phosphate free products (total G »0 .0 8) are formed. Within the limits of experimental error material balance between dephosphorylation products and inorganic phosphate is obtained. A mechanism is proposed which can account for the main products. The primary steps of the dephosphorylation are H atom abstraction from C-5 of ribose-5-phosphate by O H radicals and subsequent addition of 0 2. The peroxy radicals formed decompose to ~ 8 0 % by C-C bond cleavage followed by elimination of inorganic phosphate and only to ~ 2 0 % by direct dephosphorylation. The relevance of these results with respect to the radiolysis of D N A is discussed. 
  Reference    (Z. Naturforsch. 30b, 609—615 [1975]; received March 7 1975) 
  Published    1975 
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 Identifier    ZNB-1975-30b-0609 
 Volume    30 
139Author    Requires cookie*
 Title    Untersuchungen an quartären Pyridinium-Salzen, IV 1 Reaktionen von quaterniertem Nikotinsäureamid mit dem Trichlormethyl-Anion Investigations of Quaternary Pyridinium Salts, I V 1 Reactions of Quaternary Salts of Nicotinamide with the Trichloromethylanion  
 Abstract    Pyridinium Salts, Insertion Reaction, Azabicyclo[4,l,0]hepten Quaternary salts of nicotinamide react in presence of bases with chlorofrom to sub­ stituted 2-(or 3-)azabicyclo[4,l,0]hepten-3 (or -4). An intermediate is isolated. 
  Reference    (Z. Naturforsch. 30b, 616—621 [1975]; eingegangen am 13. Februar 1975) 
  Published    1975 
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 Identifier    ZNB-1975-30b-0616 
 Volume    30 
140Author    Requires cookie*
 Title    Fünfringheterocyclen aus Aza-hexa  
 Abstract    1.3.5-trienen über 1.3-dipolare Zwischenstufen, I Pyrazole aus 2.3-Diaza-hexa-1.3.5-trienen1,2 Five-membered Heterocycles from Aza-hexa-l,3,5-trienes via 1,3-Dipolar Intermediates, I Pyrazoles from 2,3-Diaza-hexa-l,3,5-trienes1,2 K l a u s B u r g e r , H e l m u t S c h i c k a n e d e r u n d A l f r e d M e f f e r t Electrocyclic Reactions, Pyrazoles The synthesis of 3-diethylamino-l,4-bis(l,l,l,3,3,3-hexafluoroisopropyl)-pyrazole from hexafluoroacetone azine and 1-diethylamino-propine via an azomethinimine intermediate is described. 
  Reference    (Z. Naturforsch. 30b, 622—625 [1975]; eingegangen am 4. April 1975) 
  Published    1975 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0622.pdf 
 Identifier    ZNB-1975-30b-0622 
 Volume    30 
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