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1978 (361)
141Author    Jochen Eilermann, Horst Schössner, HelmutA. LindnerRequires cookie*
 Title    Chemie polyfunktioneller Liganden  
 Abstract    , XLIV [1] Darstellung und Eigenschaften von l.l.l-Tris(diiodarsinomethyl)ethan Chemistry of Polyfunctional Ligands, XLIV [1] Preparation and Characterization of l,l,l-Tris(diiodarsinomethyl)ethane 
  Reference    Z. Naturforsch. 33b, 603—605 (1978); eingegangen am 23. März 1978 
  Published    1978 
  Keywords    l, l, l-Tris(diiodarsinomethyl)ethane, Raman, IR, FIR, *H NMR 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0603.pdf 
 Identifier    ZNB-1978-33b-0603 
 Volume    33 
142Author    Albrecht MewisRequires cookie*
 Title    AB2X2-Verbindungen im CaAl2Si2-Typ, V [1] Zur Struktur der Verbindungen CaMn2P2, CaM^As*, SrMn2P2 und SrMn2As2  
 Abstract    Four ternary compounds with the formulas CaMn2P2, CaMn2As2, SrMn2P2, and SrMn2As2 have been prepared and investigated by X-ray methods. They are isotypic and crystallize trigonally in a CaAl2Si2-type structure (space group P 3 m 1-D3d) with the lattice constants: 
  Reference    Z. Naturforsch. 33b, 606—609 (1978); eingegangen am 20. März 1978 
  Published    1978 
  Keywords    Strontium Compounds, Calcium Compounds, Manganese, Phosphides, Arsenides 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0606.pdf 
 Identifier    ZNB-1978-33b-0606 
 Volume    33 
143Author    Siegfried PohlRequires cookie*
 Title    Cis-2-telluro-1.3.22 5 .4A 3 -diazadiphosphetidin - Kristallstruktur eines in Lösung fluktuierenden Redoxsystems Cis-2-telhirium-1.3.2/ 5 .4A 3 -diazadiphosphetidine - Crystal Structure of a Redox System Fluctuating in Solution  
 Abstract    The crystal structure of the title compound was determined from single crystal X-ray data. The compound crystallises in the orthorhombic space group Pnma. In contrast to the solution where fluctuating P-Te bonds have been established by NMR analyses the crystals contain isolated molecules with fixed P-Te bonds (bond length: 235.4 pm). The four-membered phosphorus nitrogen ring exhibits significant deviations from planarity. The P-N bond lengths were found to be 168.3 and 175.0 pm, respectively. 
  Reference    Z. Naturforsch. 33b, 610—613 (1978); eingegangen am 17. Februar 1978 
  Published    1978 
  Keywords    Crystal Structure, Four-Membered Phosphorus Nitrogen Ring, Phosphorus Tellurium Compound 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0610.pdf 
 Identifier    ZNB-1978-33b-0610 
 Volume    33 
144Author    T. Platzner, J. K. ThomasRequires cookie*
 Title    Fluorescence and Proton Nuclear Magnetic Resonance Studies of Thallous Ions - Crown Ether Complexes in Organic Solvents  
 Abstract    The complexing of thallous ions (T1+), with the crown ether dibenzo 18 crown-6 poly-ether (DB) has been studied by NMR, fluorescence, and pulse radiolysis techniques. NMR data show a strong interaction of the T1+ ions with the aromatic moieties. This is also illustrated by a static quenching of the aromatic fluorescence by Tl + . The rates of reactions of T1+ with hydrated electrons eaq~ and pyrene excited singlet states are decreases on complexing the ion by the crown ether. 
  Reference    Z. Naturforsch. 33b, 614—618 (1978); received December 12 1977/March 13 1978 
  Published    1978 
  Keywords    Photochemistry, Fluorescence, Crown Ethers, Biology 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0614.pdf 
 Identifier    ZNB-1978-33b-0614 
 Volume    33 
145Author    V. Propach, D. Reinen, H. Drenkhahn, Hk Müller-BuschbaumRequires cookie*
 Title    Über die Farbe von "NiO"  
 Abstract    Ligand Field Spectra, Non-Stochiometry Depending on the method of preparation ,,NiO"-single crystals of different colours can be synthesized. It is shown by ligand field spectroscopy that the ligand field and inter-electronic repulsion parameters are the same for the green, yellow and brown crystals. There is definite spectroscopic evidence, that the colour of stochiometric NiO is green. 
  Reference    Z. Naturforsch. 33b, 619—621 (1978); eingegangen am 30. Januar/17. April 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0619.pdf 
 Identifier    ZNB-1978-33b-0619 
 Volume    33 
146Author    Norio Miyoshi, Giiti TomitaRequires cookie*
 Title    Production and Reaction of Singlet Oxygen in Aqueous Micellar Solutions Using Pyrene as Photosensitizer  
 Abstract    The reaction of singlet oxygen with 1,3-diphenylisobenzofuran was investigated in aqueous micellar solutions of sodium dodecyl sulfate and dodecyl trimethylammonium chloride using pyrene as photosensitizer. Singlet oxygen, produced by the photosensitiza-tion of pyrene bound to micelles, oxidized efficiently 1,3-diphenylisobenzofuran bound to micelles. The quantum yield for singlet oxygen production and the rate constant for furan oxidation were determined by the kinetic analysis for the oxidation reaction of furan. Quenching of singlet oxygen by sodium azide competed with the furan oxidation, and its rate constant was also determined. Results obtained were compared with those in methanolic solutions. The quantum yield for singlet oxygen production and the rate constant for furan oxidation were much higher in micellar solutions than those in methanolic solutions. Empty micelles w x as found to act as a considerably strong scavenger for singlet oxygen. The penetration probability of singlet oxygen from aqueous phase into the interior of micelles which bound furan was also estimated. 
  Reference    Z. Naturforsch. 33b, 622—627 (1978); received February 24 1978 
  Published    1978 
  Keywords    Singlet Oxygen, Pyrene, Diphenylisobenzofuran, Micelles 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0622.pdf 
 Identifier    ZNB-1978-33b-0622 
 Volume    33 
147Author    Walter FabianRequires cookie*
 Title    Semiempirische SCF-Rechnungen an den angeregten Zuständen von Hydroxy Cumarinen Semiempirical SCF-Calculations of the Excited States of Hydroxycoumarines  
 Abstract    Semiempirical SCF-calculations show that the fluorescence bands of 7-hydroxycoumarin at 1.87 • 10 4 -1,92 • 10 4 cm -1 are most probably due to a phototautomeric form. A topo-logical rule is evaluated to explain the dependence of the fluorescence intensity upon the position of the hydroxyl group in the various isomeric hydroxycoumarines. 
  Reference    Z. Naturforsch. 33b, 628—631 (1978); eingegangen am 16. März 1978 
  Published    1978 
  Keywords    Hydroxycoumarines, Fluorescence, Phototautomerism, PPP-Calculations 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0628.pdf 
 Identifier    ZNB-1978-33b-0628 
 Volume    33 
148Author    Friedrich Bölsing, Assadollah HakimRequires cookie*
 Title    Präparative organische Chemie unter Verwendung einfach herzustellender Katalysatoren A Simple Method for Preparation of Catalysts for Preparative Organic Chemistry  
 Abstract    There are numerous simple chemical reactions in which reaction products arise, which compared with the materials at the outset, possess a considerably greater surface area. A significant example is the reaction of aluminium alcoholates with water. Reactions of this kind can, to a certain extent, be used as auxiliary reactions, in order to distribute other materials homogenously. In the chosen example, a material dissolved beforehand in the alcoholate, e.g. a solution of a metal salt, would be transferred in the course of the distributing reaction into the newly-developing structure of the reaction product. In this publication the application of some catalysts thus prepared to some classical organic chemical reactions is described by way of example. 
  Reference    Z. Naturforsch. 33b, 632—635 (1978); eingegangen am 9. Februar 1978 
  Published    1978 
  Keywords    Catalysts, Hydrogenation, Dehydrogenation, Dehydration 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0632.pdf 
 Identifier    ZNB-1978-33b-0632 
 Volume    33 
149Author    Horst Böhme, KurtHenning Ahrens, Hans-Joachim Drechsler, Georg RumbaurRequires cookie*
 Title    Zur Synthese von N-(Chlormethyl)carbimidoylchloriden Synthesis of N-(Chloromethyl)carboximidoyl Chlorides  
 Abstract    N-(Chloromethyl)carboximidoyl Chlorides, N-(Chloromethyl)carboximidic Acid Chloromethylester, Tris(chloromethyl)amine, l,3-Bis(chloromethyl)-2,2,2,4,4,4-hexachloro-2,2,4,4-tetrahydro-l,3,2,4-diaz£kdiphosphetidine, N-Bis(chloromethyl)phosphoramidic Dichloride 
  Reference    Z. Naturforsch. 33b, 636—639 (1978); eingegangen am 22. Februar 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0636.pdf 
 Identifier    ZNB-1978-33b-0636 
 Volume    33 
150Author    Erich Ziegler, Wolfgang Leitner, Heinz SterkRequires cookie*
 Title    The Reactivity of the C=N-Double Bound System, XIV [1] Reactions with 3,4-Dihydroisoquinoline  
 Abstract    N-Acetyl-2-(2-ethoxycarbonyl-2-cyano-vinyl)-phenyl-ethylamine, 1,2,3,4-Tatrahydroisoquinolines 
  Reference    Z. Naturforsch. 33b, 640—645 (1978); eingegangen am 17. Februar 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0640.pdf 
 Identifier    ZNB-1978-33b-0640 
 Volume    33 
151Author    Egon Fahr, Georg Ph, Roth, Peter WüstenfeldRequires cookie*
 Title    Die gas-chromatographische Untersuchung der bei der UV-Bestrahlung von Uracil und Thymin in Lösung und in der Eismatrix gebildeten Produkte* Gas-chromatographic Investigation of Products Formed by UV Irradiation of Uracil and Thymine in Solution and Ice Matrix  
 Abstract    By g£is-chromatographic analysis of products prepared by UV irradiation of uracil in water, acetonitrile or ice matrix resp. of thymine in actonitrile could be demonstrated, that in all cases all four cyclobutane dimers are formed. 
  Reference    Z. Naturforsch. 33b, 646—651 (1978); eingegangen am 6. Dezember 1977 
  Published    1978 
  Keywords    UV, Uracil, Thymine 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0646.pdf 
 Identifier    ZNB-1978-33b-0646 
 Volume    33 
152Author    OttoJ. Scherer, Ngoc-Tram Külbach, Walter GlässelRequires cookie*
 Title    Elementorganische Amin/Imin-Verbindungen, XVIII [1] Amino-Imino-Thiophosphorane: er 3 , A 5 -Phosphazene Elementorganic Amino/Imino Compounds, XVIII [1] Aminoiminothiophosphoranes: o 3 , / 5 -Phosphazenes  
 Abstract    The reaction of the aminoiminothiophosphoranes (1) with methanol yields the bisamino-thiophosphoric acid derivatives (3). la and IV b ->VTb element halides form the new P-N element four membered rings 4->-7, which partially exist as a mixture of eis and trans isomers. Different ylide group transfer is observed on the reaction of la with trimethyl -phosphine or trimethyl phosphite. With trimethylphosphine (CH3)3P(S) and a phos-pha(III)azene are formed, with trimethyl phosphite (CH30)3P = NC(CH3)3 and the [2 + 2] cycloaddition product of la and (R3C)(R3Si)N-P = S (R = CH3) can be isolated. 
  Reference    Z. Naturforsch. 33b, 652—656 (1978); eingegangen am 16. Februar/13. März 1978 
  Published    1978 
  Keywords    Ring Closure Reactions, Ylide Group Transfer, NMR 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0652.pdf 
 Identifier    ZNB-1978-33b-0652 
 Volume    33 
153Author    M. P. Singh, A. K. Singh, Mandhir KumarRequires cookie*
 Title    Mechanism of Hg(II) Oxidation of D-Galactose in Alkaline Medium  
 Abstract    D-Galactose, Nessler's Reagent The present paper deals with the kinetics of oxidation of D-galactose by Nessler's reagent in alkaline medium. The reaction is zero order with respect to Hg(II) and first order with respect to reducing sugar. The direct proportionality of the reaction rate at low hydroxide ion concentrations shows retarding trend at higher concentrations. The reaction rate is inversely proportional to iodide ion concentration. A mechanism has been proposed taking Hgl3~ as the reacting species. 
  Reference    Z. Naturforsch. 33b, 657—659 (1978); received February 27 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0657.pdf 
 Identifier    ZNB-1978-33b-0657 
 Volume    33 
154Author    FathyA. Amer, AbdelHamid Harhash, MaryL. AwadRequires cookie*
 Title    Synthesis of 2-Methyl-l-phenylthiocarbamoylglyoxal Arylhydrazones and Diethyl(arylazo)(phenylthiocarbamoyl)malonate and their Reactions with Hydrazines  
 Abstract    Treatment of a-phenylthiocarbamoyl acetyl acetone (1) with aromatic diazonium salts effects acetyl cleavage with the formation of 2-methyl-l-phenylthiocarbamoylglyoxal arylhydrazones (2a-c), which afford the anilinopyrazoles (5a-c) and the phenylimino-2-pyrazolines (6a-c) on treatment with hydrazine or phenyl hydrazine respectively. Treatment of diethyl a-phenylthiocarbamoyl malonate with aryl diazonium salts gave diethyl (arylazo)(phenylthiocarbamoyl) malonate which afford the 7-phenyl-5-(arylazo)-2,3,7-triazabicyclo[3,2,0]hept-l-ene-4,6-dione (9a, b) and its 3-phenyl derivatives (9c, d) with hydrazines and phenyl hydrazine respectively. 
  Reference    Z. Naturforsch. 33b, 660—662 (1978); received January 5 1978 
  Published    1978 
  Keywords    Hydrazines, Pyrazoles, Arylhydrazones 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0660.pdf 
 Identifier    ZNB-1978-33b-0660 
 Volume    33 
155Author    Gerhard Schaden, Herrn Prof, G O Dr, SchenckRequires cookie*
 Title    Kurzzeitpyrolyse, VIII [1] Reaktionen bei der CO-Eliminierung aus ehinoiden Verbindungen Short Time Pyrolysis, VIII [1] Reactions after CO-Elimination from Quinoid Compounds  
 Abstract    Gas-Phase Pyrolysis, Polycyclic Aromatic Hydrocarbons Fuchsone (4-diphenylmethylene-2,5-cyclohexadien-l-one) (1) eliminates CO upon gas-phase pyrolysis. The resulting biradical (2) either formes by double ring closure and dehydrogenation benzo[c]phenanthrene (6) or recombines to 6,6-diphenylfulvene (3) which gives after dehydrogenative ring closure and rearrangement 1-phenylacenaphthy-lene (11). 
  Reference    Z. Naturforsch. 33b, 663—665 (1978); eingegangen am 2. Februar 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0663.pdf 
 Identifier    ZNB-1978-33b-0663 
 Volume    33 
156Author    BarryJ. Parsons, Dietrich Schulte-Frohlinde, Clemens Von SonntagRequires cookie*
 Title    Reaction of Br3' 2 -with 2-Deoxy-D-ribose. A Preferred Attack at C-l  
 Abstract    In the photolysis of 5-bromouracil containing DNA Br atoms are expected inter mediates. In order to evaluate the possible site of attack of the Br atom at the sugar moiety of DNA the reaction of 2-deoxy-D-ribose with the Br atom (complexed with two bromide ions) was investigated. Hydroxyl radicals generated by the radiolysis of N20 saturated aqueous solutions were converted into Br3 -2_ radicals by 1 M bromide ions. Br3-2-reacts with 2-deoxy-D-ribose (k = 3.7 • 10 4 M -1 s -1 , pulse radiolysis). The major product is 2-deoxy-D-erythro-pentonic acid (G = 2.4, y-radiolysis). It is formed by hydrogen abstraction from C-l and oxidation of this radical by other radicals. An alternative route via the radical at C-2 is neglible. It follows that Br3-2 ~ reacts preferentially at C-l of 2-deoxy-£>-ribose. 
  Reference    Z. Naturforsch. 33b, 666—668 (1978); received March 15 1978 
  Published    1978 
  Keywords    Pulse Radiolysis, y-Radiolysis, 2-Deoxy-D-ribose, G-values, Radical Reactions 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0666.pdf 
 Identifier    ZNB-1978-33b-0666 
 Volume    33 
157Author    Hk Müller-Buschbaum, D. Chales De BeaulieuRequires cookie*
 Title    Zur Besetzung von Oktaeder- und Tetraederpositionen in Bi2Ca2Fe209 About Occupation of Octahedral-and Tetrahedral Positions of Bi2GaoFe209  
  Reference    Z. Naturforsch. 33b, 669—670 (1978); eingegangen am 17. März 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0669_n.pdf 
 Identifier    ZNB-1978-33b-0669_n 
 Volume    33 
158Author    Albrecht Mewis, Peter BlumstengelRequires cookie*
 Title    Ternäre Verbindungen in den Dreistoffsystemen Calcium-Kupfer-Phosphor (Arsen) Ternary Compounds in the Systems Calcium -Copper -Phosphorus (Arsenic)  
 Abstract    By investigations in the systems Ca-Cu-P(As) we found two ternary phases of the formulas CaCuP and CaCuAs, which crystallize in a hexagonal lattice. We suppose a modified Ni2ln-type structure. Some details about a Calcium Copper Phosphide with a ThCr2Si2-type struc-ture are given. 
  Reference    Z. Naturforsch. 33b, 671—672 (1978); eingegangen am 3. März/4. April 1978 
  Published    1978 
  Keywords    Calcium Compounds, Copper, Phosphides, Arsenides, Crystal Data 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0671_n.pdf 
 Identifier    ZNB-1978-33b-0671_n 
 Volume    33 
159Author    W. Maringgele, A. Meiler, H. Nöth, R. SchroenRequires cookie*
 Title    Darstellung und Assoziation einiger Phosphiniminoborane Preparation and Association of Some Phosphiniminoboranes  
 Abstract    Triphenylphosphiniminodihalogenoboranes, Triphenylphosphindiorganylboranes, NMR N -Trimethylsily 1 -triphenylphosphinimine re -acts with halogenoboranes R2BX (R = organyl, F, Cl, Br; X = F, Cl, Br) to yield triphenylphos-phiniminodihalogenoboranes and triphenylphos-phiniminodiorganylboranes, respectively. In so-lution, the dihalogeno compounds are associated, probably dimeric, while the diorganyl derivatives are monomeric. Mass spectroscopic data of the compounds show them to be monomeric in the vapor phase. 
  Reference    Z. Naturforsch. 33b, 673—675 (1978); eingegangen am 14. März 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0673_n.pdf 
 Identifier    ZNB-1978-33b-0673_n 
 Volume    33 
160Author    Klaus Deller, Brigitte EisenmannRequires cookie*
 Title    BaSb3, ein Antimonid mit einem zwei- dimensional unendlichen [Sb3 2 ] n-Poly anion BaSb3, an Antimonide with an Infinite Twodimensional [Sb3 2 ~]n -Anion  
 Abstract    The new compound BaSb3 has been prepared and its structure determined. It crystallizes monoclinic (C 2/m, a = 1080.7(5) pm, b = 851.9(5) pm, c = 647.1(5) pm, ß = 112.66(4)°). The Sb-atoms build up 14-rings of two-and threebonded Sb, which are connected to puckered nets. 
  Reference    Z. Naturforsch. 33b, 676—677 (1978); eingegangen am 17. März 1978 
  Published    1978 
  Keywords    Barium Antimonide, Crystal Structure, Intermetallic Compound 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0676_n.pdf 
 Identifier    ZNB-1978-33b-0676_n 
 Volume    33 
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