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Facet   section ZfN Section B:Volume 030  [X]
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1975 (239)
21Author    Requires cookie*
 Title    ESR-spektrometrischer Nachweis des Polysulfidradikalions S3~  
  Reference    (Z. Naturforsch. 30b, 88—90 [1975]; eingegangen am 27. September 1974) 
  Published    1975 
  Keywords    Sulfur Chemistry, Nonaqueous Solvents, ESR Spectra 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0088.pdf 
 Identifier    ZNB-1975-30b-0088 
 Volume    30 
22Author    J., D. K.Requires cookie*
 Title    S 0 2-Einschiebung in Triphenylvinylzinn D eterm ination of the Nucleophilicity of Tin-Carbon Bond, I I 1 S 0 2-Insertion into Triphenylvinyltin  
 Abstract    The S 0 2-insertion into tin-carbon bonds of mixed tetraorganostannanes, R 3SnR / (R = C6H 5, CH3; R' = CH3, C6H 5, CH2 = CH), is determined by the nucleophilicity of the organic residue attached to metal and shows a decreasing rate in the order aryl > alkenyl > alkyl. A correlation to Taft's constant is given. The behaviour of triphenylvinyltin toward sulfur dioxide is in good agreement with this S 0 2 takes place only into Sn-C6H 5 bond. 
  Reference    (Z. Naturforsch. 30b, 91—95 [1975]; eingegangen am 24. September 1974) 
  Published    1975 
  Keywords    Nucleophilicity, Tin-carbon Bond, S 0 2-insertion, Triphenylvinyltin, Taft's Constant 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0091.pdf 
 Identifier    ZNB-1975-30b-0091 
 Volume    30 
23Author    A.N G ArgRequires cookie*
 Title    Correlation of Mössbauer Quadrupole Splitting ( zI/?q) and Infrared Cyanide Frequency Separation in Alkali Metal Ferricyanides  
 Abstract    Mössbauer and infrared spectra of the alkali metal ferricyanides M* [Fe(CN)6] • n H 20 , where M1 = H , Li and N a were studied at room temperature. All the three compounds displayed a doublet with small quadrupole splitting (AEq). Infrared spectra of these compounds in solid state gave two frequencies for C = N stretching vibrations with their separation (Av) in increasing order which was found to be linearly correlated with AEq. A plausible explanation has been given in terms of the interaction of Li+ and Na+ cations w ith the CN-ligands of octahedrally symmetric ferricyanide anion [Fe(CN)6] 3-similar to that of hydrogen atoms which are hydrogen bonded in H 3Fe(CN)6. 
  Reference    (Z. Naturforsch. 30b, 96—98 [1975]; received February 1 /September 3 1974) 
  Published    1975 
  Keywords    Mössbauer Effect, IR Spectra, Ferricyanide Complexes, Hydrogen Bonding, Molecular Structure 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0096.pdf 
 Identifier    ZNB-1975-30b-0096 
 Volume    30 
24Author    B.L H, S.N JRequires cookie*
 Title    Kinetics of Oxidation o f Substituted Mandelic Acids by Peroxodisulphate Catalysed by Silver(I) Ions  
 Abstract    Mandelic Acid, Silver(I)ions, Peroxodisulphate The kinetics of the reaction between peroxodisulphate and p-chloro and p-bromo mandelic acid catalysed by silver(I)ions have been studied. The rate of peroxodisulphate disappearance was found to be dependent (i) on [S20 8~2] (ii) on [Ag+]. The rate is in­ dependent of the substituted acid concentration. Thermodynamic parameters have been evaluated. A mechanism of the oxidation o f substituted mandelic acid by peroxodisulphate catalysed by silver(I) has been suggested. 
  Reference    (Z. Naturforsch. 30b, 99—102 [1975]; received August 26 1974) 
  Published    1975 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0099.pdf 
 Identifier    ZNB-1975-30b-0099 
 Volume    30 
25Author    B. R. IjRequires cookie*
 Title    Sorption o f Certain Cationic M etal-ammines in Ferric Phosphate  
 Abstract    Ferric Phosphate, Inorganic Ion Exchanger, Metal Ammines Sorption of ammine complexes of Cu2+, N i2+, Zn2+ and Cd2+ on ferric phosphate has been studied at different ionic concentration in the external solution. It has been found that qA and Kd values attain a maximum with increasing concentration (0.02 m) beyond which a fall is observed. Selectivity quotients of the exchanger material towards competing pairs of the metal ammine ions e.g. (Cu(II)-Zn(II), Cu(II)-Cd(II) and C u(II)-N i(II) have also been measured as a function of the concentration of the external solution. The selectivity effects in general, decrease w ith increase in the external concentration. The qA and selectivity follows the same trend i.e. Zn2+ > Cd2+ 
  Reference    (Z. Naturforsch. 30b, 103—106 [1975]; received September ll/O ctober 2 1974) 
  Published    1975 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0103.pdf 
 Identifier    ZNB-1975-30b-0103 
 Volume    30 
26Author    K. N., D.S JRequires cookie*
 Title    2-Amino Cyclopentene-l-dithiocarboxylic Acid Complexes o f C u(I), R h (I) and H g(II) 2-Amino Cyclopentene-l-dithio Carboxylic Acid, Metal Complexes, Copper(I), Rhenium(I), Mercury (II)  
  Reference    (Z. Naturforsch. 30b, 107—111 [1975]; received September 16 1974) 
  Published    1975 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0107.pdf 
 Identifier    ZNB-1975-30b-0107 
 Volume    30 
27Author    Requires cookie*
 Title    Indirekter Nachweis von Assoziaten solubilisierter, polycyclischer, aromatischer Kohlenwasserstoffe in wäßrigen Seifenlösungen durch Lichtabsorption und Fluoreszenz* Indirect Evidence for Molecular Association of Polycyclic Aromatic Hydrocarbons in Aqueous Soap Solutions from Light Absorption and Fluorescence  
 Abstract    e s k e , W. L u d e r s c h m i d t und W. H a m m e r Polycyclic Hydrocarbons, Association, Soap Solutions Aqueous solutions of alkyl sulphates containing small amounts of the free alkanol differ in their dissolving properties for polycyclic aromatic hydrocarbons from aqueous solutions of the pure soap in concentrations near the CMC. The differences are observed only near the CMC of the pure soap, where the soap solutions containing free alkanol have a minimum of the surface tension. The observed alterations are deviations from the Lambert-Beer law, energy transfer, and changes of the fluorescence quantum efficiencies, when the soap concentration is varied. The different results are consistent with the assump­ tion that microcristalline molecular van der Waals associations are brought into solution by the soap solutions which were studied. 
  Reference    (Z. Naturforsch. 30b, 112—118 [1975]; eingegangen am 28. September 1974) 
  Published    1975 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0112.pdf 
 Identifier    ZNB-1975-30b-0112 
 Volume    30 
28Author    Requires cookie*
 Title    Zur Stereochemie der Phosphinoxydspaltung von R -Methyl -phenyl-a -naphthyl -allyl-phosphoniumbromid The Stereochemistry of the Phosphine Oxide Cleavage of R-( + )-Methyl-phenyl-a-naphthyl-allyl-phosphonium Bromide  
 Abstract    The stereochemical course of the 'phosphine oxide cleavage' of chiral R-(+)-methyl-phenyl-a-naphthyl-allyl-phosphonium bromide is reported. While the a-naphthyl group is cleaved by alkali with predominant retention of configuration at the central phosphorus atom, the allyl group is split off with predominant inversion. 
  Reference    (Z. Naturforsch. 30b, 119—123 [1975]; eingegangen am 11. September 1974) 
  Published    1975 
  Keywords    Phosphine Oxide Cleavage, Stereochemistry, Chiral Phosphonium Salts 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0119.pdf 
 Identifier    ZNB-1975-30b-0119 
 Volume    30 
29Author    A.F A S, S.S W B, M.A A, L-ARequires cookie*
 Title    Reactions of Aromatic Amines on 5-Arylidene-4-methylmercapto-hydantoin and 5-Arylazo-2-methylmercapto-hydantoin Aromatic Amines, 5-Arylidene-4-methylmercapto-hydantoin, 5-Arylazo-2-methylmercapto-hydantoin  
  Reference    (Z. Naturforsch. 30b, 124—127 [1975]; received August 5 1974) 
  Published    1975 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0124.pdf 
 Identifier    ZNB-1975-30b-0124 
 Volume    30 
30Author    Requires cookie*
 Title      
 Abstract    The reaction of imines with various electrophiles have afforded only N-alkylated products, contrary to earlier reports. While a large amount of work has been done on the synthetic applications of tertiary enamines, pioneered by S t o r k and coworkers1*2, less is known about the scope of similar applicability of secondary enamines. Secondary enamines predo­ minantly exist in the imino form both in aliphatic and in cyclic compounds except in cases where the R. R I tertiary enamine secondary enamine 
  Reference    (Z. Naturforsch. 30b, 128—131 [1975]; received September 13 1974) 
  Published    1975 
  Keywords    Imines, Enamines, Alkylation, Tautomerism 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0128.pdf 
 Identifier    ZNB-1975-30b-0128 
 Volume    30 
31Author    Requires cookie*
 Title    Ternary Magnesium Compounds of Zinc with 5B- group Elements  
 Abstract    A l b r e c h t M e w i s , P e t e r K l ü f e r s u n d H a n s -U w e S c h u s t e r By investigations in the systems Mg— Zn-P (As) we found two ternary phases of the formulas Mgi.75Znj.25P 2 and Mg2ZnAs2, which crystallize in a trigonal lattice. We suppose a modified anti-La20 3-type struc­ ture. 
  Reference    (Z. Naturforsch. 30b, 132 [1975]; eingegangen am 27. September 1974) 
  Published    1975 
  Keywords    Ternary Magnesium Compounds, 5 B-Elements, Crystal Data 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0132_n.pdf 
 Identifier    ZNB-1975-30b-0132_n 
 Volume    30 
32Author    Requires cookie*
 Title    A New Ternary Phase in the System Li-Au-Sb  
 Abstract    H a n s -U w e S c h u s t e r u n d W o l f g a n g D i e t s c h By further investigation of the system Li-Au-Sb we found a second1 cubic phase of the formula LiAuSb which crystallizes in the spacegroup Ta2-F 43 m, the lattice-constant 
  Reference    (Z. Naturforsch. 30b, 133 [1975]; eingegangen am 27. September 1974) 
  Published    1975 
  Keywords    Ternary Lithium Compounds, Transition Metals, Crystal Data 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0133_n.pdf 
 Identifier    ZNB-1975-30b-0133_n 
 Volume    30 
33Author    Requires cookie*
 Title    New Synthesis of N-phosphoranylidene-sulfuric Aeid Amides, -sulfuric Acid Alkylester Amides, -fluoro- sulfuric Acid Amide and -alkylsulfonamide, I I 1-2  
 Abstract    By reaction of triphenylphosphine and carbon tetrachloride with methane sulfon­ amide (la) and the sulfamic acid derivatives 
  Reference    (Z. Naturforsch. 30b, 134—135 [1975]; eingegangen am 2. Oktober 1974) 
  Published    1975 
  Keywords    Triphenylphosphine, Carbon Tetrachloride, Sulfamic Acid Derivatives, Methane Sulfonamide 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0134_n.pdf 
 Identifier    ZNB-1975-30b-0134_n 
 Volume    30 
34Author    E., J. B.Requires cookie*
 Title    Infrared Spectrum of LaGa03  
 Abstract    Lanthanum Gallate, IR Spectrum, Vibrational Assignment The IR spectrum of LaGa03 is reported and discussed in comparison with those of related compounds. The valence force con­ stant for the G a-0 bonds is also estimated. 
  Reference    (Z. Naturforsch. 30b, 136—137 [1975]; eingegangen am 23. September 1974) 
  Published    1975 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0136_n.pdf 
 Identifier    ZNB-1975-30b-0136_n 
 Volume    30 
35Author    M. Iv E, A.F M, F. D.Requires cookie*
 Title    Thiol Ester Aminolysis in Acetonitrile  
 Abstract    The kinetics of the reactions of p-nitro -phenyl thiolacetate with several amines in acetonitrile was studied. Hydrazine exhibits considerably greater nucleophilicity than expected from its pKa value. Common mech­ anism is suggested for the aminolysis of the thiol ester and its oxygen analogue. 
  Reference    (Z. Naturforsch. 30b, 138 [1975]; received September 30 1974) 
  Published    1975 
  Keywords    Thiol Ester, Aminolysis, Kinetics, Mechanism, Alpha Effect 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0138_n.pdf 
 Identifier    ZNB-1975-30b-0138_n 
 Volume    30 
36Author    Requires cookie*
 Title    A New Synthesis of /3-Brazanquinone  
 Abstract    W o l f g a n g S t a d l b a u e r und T h o m a s K a p p e ß-Brazanquinone Synthesis, Cyclodehydrogenation, Palladium 3 -Hydroxy -2 -phenyl -1.4 -naphthoquinone is cyclodehydrogenated at 250 °C in the pre­ sence of palladium yielding jS-brazanquinone. 
  Reference    (Z. Naturforsch. 30b, 139—140 [1975]; eingegangen am 13. September 1974) 
  Published    1975 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0139_n.pdf 
 Identifier    ZNB-1975-30b-0139_n 
 Volume    30 
37Author    Requires cookie*
 Title    Synthesis of 4-Formyl-quinoline-2-carboxylic Acids  
 Abstract    O tto S c h m u t und T h o m a s K a p p e o-Aminophenylglyoxal Dimethylacetal, Friedländer Synthesis The reaction of o-aminophenylglyoxal di-methylacetales with sodium pyruvate in the presence of sodium ethoxide yields 4-di-methoxymethyl-quinoline-2-carboxylic acids which give the title compounds on acid hydrolysis. 
  Reference    (Z. Naturforsch. 30b, 140—141 [1975]; eingegangen am 2. September 1974) 
  Published    1975 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0140_n.pdf 
 Identifier    ZNB-1975-30b-0140_n 
 Volume    30 
38Author    W.Requires cookie*
 Title    Circulardichroismusuntersuchungen des Thyreotropin-Releasinghormons (TRH) Circular Dichroism Investigations of TRH  
 Abstract    o l f g a n g V o e l t e r , K a r l Z e c h , P e t e r G ö b e l , O s k a r O s t e r u n d A n t o n io A t t a n a s io Im Zusammenhang mit Untersuchungen zur Struktur13 und Wirkungsweise4 der kürzlich aufge­ klärten5-6 Hypothalamus-Releasinghormone haben wir Circulardichroismus(CD)-Spektren des Thyreo­ tropin-Releasinghormons (TRH) vermessen, da mit der Methode des CD konformative und konfi­ gurative Änderungen optisch aktiver Moleküle nachweisbar sind. TRH wird durch Kuppeln der Aminosäurederi­ vate Benzyloxycarbonyl-(4.4'-dimethoxybenzhy-dryl)-L-glutamin, L-Histidin-methylester und l -Prolinamid mit N.N'-Dicyclohexylcarbodiimid dar­ gestellt3. Die Primärstruktur von TRH ist Pyr-His-Pro-NH2. 
  Reference    (Z. Naturforsch. 30b, 142—143 [1975]; eingegangen am 15. September 1973) 
  Published    1975 
  Keywords    Circular Dichroism, Releasing Hormones, Peptides 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0142_n.pdf 
 Identifier    ZNB-1975-30b-0142_n 
 Volume    30 
39Author    Für DefektzinkblendephasenRequires cookie*
 Title    Die Kristallstruktur von MnIn2Te4, eine neue OrdnungsVariante  
 Abstract    The Crystal Structure of M nIn2Te4, a New Type of Ordered Defect Zincblende Phases K l a u s -J ü r g e n R a n g e und H e i n z -J o a c h i m H ü b n e r Manganese Indium Telluride, Crystal Structure, Tetrahedral Defect Structure MnIn2Te4 was prepared by direct synthesis from the elements at 800 °C. The crystals are tetragonal, space group 142m, with a = 6.191 A, c = 12.382 A, and Z = 2. The structure can be derived from the zincblende structure. It is related to the CdGa2S4 and /5-Cu2Hg.J4 type structures with the same ordered arrangement of vacancies. In MnIn2Te4, however, the different cations are distributed randomly over the occupied tetrahedral sites. 
  Reference    (Z. Naturforsch. 30b, 145—148 [1975]; eingegangen am 22. November 1974) 
  Published    1975 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0145.pdf 
 Identifier    ZNB-1975-30b-0145 
 Volume    30 
40Author    Requires cookie*
 Title    Kristall-und Molekülstruktur des Chlorodinitrosyltriphenylpliospliineisens(-I)  
 Abstract    Crystal and Molecular Structure of Chlorodinitrosyltriphenylphosphineiron(-I) J ü r g e n K o p f und J ö r n S ch m id t Chlorodinitrosyltriphenylphosphineiron(-I), Molecular Structure Crystals of [Fe(NO)2P 0 3Cl] are monoclinic with a = 1.6265(7) [nm], b = 1.4495(7) [nm], c = 1.5609(6) [nm] and ß = 96.86(2) deg.; the space group is C2/c. The structure was 
  Reference    (Z. Naturforsch. 30b, 149—154 [1975]; eingegangen am 6. Dezember 1974) 
  Published    1975 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0149.pdf 
 Identifier    ZNB-1975-30b-0149 
 Volume    30 
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