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1Author    A. G. Galinos, J. K. Kouinis, P. V. Ioannou, ThF. Zafiropoulos, S. P. PerlepesRequires cookie*
 Title    Compounds of Complex Halo and Pseudohalo Acids of the Group II B Metals, Part I Etherate, Pyridine and Aniline Compounds of Zn(II)  
 Abstract    The preparation of sixteen new etherate, pyridine and aniline compounds of complex halo and pseudohalo acids of Zn(II) is reported. The study of some physical and chemical properties as well as the UV and IR spectra of these compounds are discussed. Tetrahedral structures are proposed for all compounds in the solid state. 
  Reference    Z. Naturforsch. 34b, 1101—1106 (1979); received May 11 1979 
  Published    1979 
  Keywords    Ether, Pyridine, Aniline, Thiocyanate, Zinc 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-1101.pdf 
 Identifier    ZNB-1979-34b-1101 
 Volume    34 
2Author    Peter Pullmann, Karl Hensen, JanW. BatsRequires cookie*
 Title    Röntgenstrukturbestimmung von A1C13-Pyridin-Addukten: Der strukturelle Aufbau im fra7is-Dichlorotetrakis(pyridin)aluminium(III)- Tetrachloroaluminat(III) und im Trichlorotris(pyridin)aluminium(III) X-ray Diffraction Study of AICI3-Pyridine Adducts: The Crystal Structure of 7ra/?s-Dichlorotetrakis(pyridine)aluminium(III)tetrachloroaluminat(III) and of Trichlorotris(pyridine)aluminium(III)  
 Abstract    Crystals of [A1(C5H5N)4C12][A1C14] are orthorhombic, Pna2lf Z = 4, a = 18.522(7), b = 15.141(5), c = 9.593(3) A, V = 2690(2) A 3 , Dc = 1.440 g/cm 3 . The structure has been solved from 5968 diffractometer measured intensities and refined by full-matrix least squares to RW(F) = 0.032. The crystal structure shows the complex to be £ra»s-dichloro-tetrakis(pyridine)aluminium(III) tetrachloroaluminat(III). The mean trans Al-Cl-and trans Al-N-distances in the octahedron are 2.279(3) and 2.070(4) A, respectively. Crystals of Al(C5H5N)3Cl3 are monoclinic, P2i/c, Z = 4, a = 7.261(2), b = 29.961(4), c = 8.624(1) A, ß = 98.12(2)°, V -1857(1) A 3 , D0 = 1.326 g/cm 3 . The structure has been solved from 4707 diffractometer measured intensities and refined to RW(F) = 0.028. The crystal structure shows octahedral complexes AICI3 • 3 (C5H5N) with trans geometry. The Al-N-distance trans to chlorine (2.096(2) A) is significantly longer than the two other Al-N-distances (mean 2.072(2) A). 
  Reference    Z. Naturforsch. 37b, 1312—1315 (1982); eingegangen am 5. Mai 1982 
  Published    1982 
  Keywords    Aluminium Chloride, Pyridine, Crystal Structure 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1312.pdf 
 Identifier    ZNB-1982-37b-1312 
 Volume    37 
3Author    W. Alter Maringgele, Anton Meller, Sven Dielkus, RegineH. Erbst-Irm, ErRequires cookie*
 Title    Reaktionen von Pyridin-Basen mit Na/K-Legierung und Diorganylaminodifluorboranen Reactions o f Pyridine-Bases with Na/K-Alloy and D iorganylam inodifluoroboranes  
 Abstract    Lutidines react with N a/K alloy and diorganylaminodifluoroboranes in «-hexane. The products formed depend upon the position o f the methyl groups. While from 3,4-lutidine (C) the bis(lutidinyl)am inoboranes 2 -5 are obtained, the 2,4-, 2,5-, and 3,5-lutidines (F, G, H) give the 11 a, 1 lb-dihydro-[l,3,2]-diazoborolo-[5,l-b;3,4-b']-dilutidines 1 1 -1 7 . 4-Picoline reacts analogously to give 10. Pyridine (A) and collidine (B) give adducts with borane. From 2,3-lutidine (D), the 1,4-dihydro-l,4-bis(fluoram inoboryl)-2,3-lutidine 8 is obtained. 'H, "B, l3C, 19F, -9Si, 15N N M R and MS data are given. For 8 and 14 the X-ray structures are reported. 
  Reference    Z. Naturforsch. 48b, 561—5 (1993); eingegangen am 27. April 1992 
  Published    1993 
  Keywords    Pyridine, Picoline, Lutidine, Collidine, Dilutidinylaminoboranes 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0561.pdf 
 Identifier    ZNB-1993-48b-0561 
 Volume    48 
4Author    Norbert Kuhna, Stefan Fuchs3, Rolf Minkwitzb, Thorsten Berendsb, Herrn Professor, DrH P FritzRequires cookie*
 Title    Collidinium-und Imidazolium-Salze Fluor-haltiger Anionen  
 Abstract    Die Kristall­ struktur von [CollH]2 [AsF6][As2 Fu ] (Coli = 2,4,6-Trimethylpyridin) Collidinium and Imidazolium Salts of Fluorine-Containing Anions. The Crystal Structure of [CollH]2[AsF6][As2Fl l ] (Coll = 2,4,6-Trimethylpyridine) From s-Collidine (1, Coll) and aqueous HF compounds of the composition Coll • n HF (n = 1 -2) are formed which are transformed to [CollH]+ [HF2]~ (2) by sublimation. [CollH]2[AsF6][As2F] J (3) is obtained from 1 and the superacid system HF/AsF5. 2 reacts with 2,3-dihydro-l,3-diisopropyl-4,5-dimethylimidazol-2-ylidene (4, Im) to give the imidazo­ lium salt [ImH]+ [HF2]~ (5). Hydrogen bonds in the crystal structure of [CollH]2[AsF6][As2Fn ] (3) are discussed. 
  Reference    Z. Naturforsch. 56b, 626—629 (2001); eingegangen am 3. Mai 2001 
  Published    2001 
  Keywords    Hydrogen Fluoride, Imidazoles, Pyridines 
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 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0626.pdf 
 Identifier    ZNB-2001-56b-0626 
 Volume    56 
5Author    G. Abou-Elenien+, J. Rieser++, N. Ismail+++, K. WallenfelsRequires cookie*
 Title    Elektrochemische Eigenschaften von Dihydropyridin-und Pyridinderivaten Electrochemical Properties of Pyridine and Dihydropyridine Derivatives  
 Abstract    The electrochemical oxidation and reduction properties of different dihydropyridines and pyridines have been investigated in non aqueous solvent as benzonitrile and aceto-nitrile with tetra-n-butylammonium perchlorate as supporting electrolyte at platinium electrodes using DC-voltametry, cycl. voltametry and coulometry. Possible redox-mechanisms are discussed. 
  Reference    Z. Naturforsch. 36b, 386—390 (1981); eingegangen am 26. November 1980 
  Published    1981 
  Keywords    Pyridines, Dihydropyridines, Electrochemical Behavior, Redox-Potentials 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0386.pdf 
 Identifier    ZNB-1981-36b-0386 
 Volume    36 
6Author    MichaelW. Zenke, Karl HensenRequires cookie*
 Title    Thermodynamische Untersuchungen zur Lewis-Acidität von Trimethylchlorsilan - die Phasendiagramme und Exzeßvolumina der Systeme (CH3)3SiCl/Pyridin und (CH3)3CC1/Pyridin Thermodynamic Examinations on the Lewis Acidity of Trimethylchlorosilane - the Phase Diagrams and Excess Volumes of the Systems (C H 3)3SiCl/Pyridine and (CH3)3CC1/Pyridine  
 Abstract    The isobaric melting and boiling diagrams for the systems: trimethylchlorosilane/pyridine and trimethylchloromethane/pyridine are reproduced. Some measurements of the molar vol­ ume of mixtures between trimethylchlorosilane and pyridine and trimethylchloromethane and pyridine are reported. For both systems the molar excess volume has been calculated as a function of the mole fractions. 
  Reference    Z. Naturforsch. 49b, 759—7 (1994); eingegangen am 7. Februar 1994 
  Published    1994 
  Keywords    Phase Diagrams, Pyridine, Trimethylchlorosilane, Trimethylchloromethane, Excess Volumes 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0759.pdf 
 Identifier    ZNB-1994-49b-0759 
 Volume    49 
7Author    Z. NaturforschRequires cookie*
 Title    R eaction o f 9-B orabicyclo[3.3.1]nonane with N-Trim ethylsilylam ines -C leavage o f the N-Si or N -H Bond  
 Abstract    The reaction of dimeric 9-borabicyclo[3.3.1]no-nane 1 with N-trimethylsilyl-aniline 2 affords 9-anilino-9-borabicyclo[3.3.1]nonane 5 by elimina­ tion of trimethylsilane. In contrast, 1 reacts with the N-trimethylsilyl-2-aminopyridines 3 and 4 se­ lectively by elimination of H 2 to give the corre­ sponding N-trimethylsilyl-aminoboranes 6 and 7. The latter reactions proceed via formation of bo-rane-pyridine adducts. 
  Reference    Z. Naturforsch. 53b, 393—395 (1998); received December 29 1997 
  Published    1998 
  Keywords    Aminoborane, Aminosilane, Boron, Pyridine, NMR Data 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0393_n.pdf 
 Identifier    ZNB-1998-53b-0393_n 
 Volume    53 
8Author    PeterG. Jones, Birte AhrensRequires cookie*
 Title    Gold(I)-Komplexe mit Aminliganden, II [1]. (Methylpyridin)-Komplexe von Gold(I) Gold(I) Complexes with Amine Ligands, II. Methylpyridine Complexes of Gold(I)  
 Abstract    Gold(I) complexes of overall formula LAuCl (L = various methylpyridines) are non-con­ ducting in acetone. X-ray structure analyses show that the solid state structure of the cor­ responding complex 1 (L = 2-picoline) is molecular; the 3-picoline derivative 2 is however ionic (L2A u)+(AuCl2)-. 3-Picoline forms a molecular complex LAuC6F5 (3) and also the ionic (L2Au)+(SbF6)_ (4). Complexes 1, 2 and 4 display short A u--A u contacts, leading to chains of gold atoms; additionally, complexes 3 and 4 show weak Au-F contacts. The (3-picoline)-gold(III) complex /rans-(L2AuCl2)+(SbF6)_ (5) was obtained as a by-product; it too contains short Au-F contacts. 
  Reference    Z. Naturforsch. 53b, 653—662 (1998); eingegangen am 6. April 1998 
  Published    1998 
  Keywords    Gold(l), Pyridine, Amine Complexes, X-Ray Data 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0653.pdf 
 Identifier    ZNB-1998-53b-0653 
 Volume    53 
9Author    Norbert Kuhn3, Joanna Fahl3, Roland Boeseb, Gerald HenkelcRequires cookie*
 Title    Zur Reaktion von 2,3-Dihydroimidazol-2-ylidenen mit Pentafluorpyridin: Carbene als Reaktionspartner in der nucleophilen aromatischen Substitution [1] On the Reaction of 2,3-Dihydroimidazol-2-ylidenes with Pentafluoropyridine: Carbenes as Reactants in Nucleophilic Aromatic Substitution [1]  
 Abstract    The 2,3-dihydro-l,3,4,5-tetraalkylimidazol-2-ylidenes 3 (R = Me, i'so-Pr) react immediately with pentafluoropyridine to form the 2-tetrafluoropyridylimidazolium salts 4 in good yields. In contrast with the tetramethyl derivative 4a, alkyl fluoride is eliminated from the isopropyl salt 4b to give 1 -isopropyl-4,5-dimethyl-2-tetrafluoropyridylimidazole, which dimerises via hydrogen bridges in the solid state (7). The X-ray structures of l,3-diisopropyl-4,5-dimethyl-2-tetrafluoropyridylimidazolium chloride (5) and 7 are reported. 
  Reference    Z. Naturforsch. 53b, 881—886 (1998); eingegangen am 9. April 1998 
  Published    1998 
  Keywords    Carbenes, Imidazoles, Pyridines, Nucleophilic Aromatic Substitution, Hydrogen Bonds 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0881.pdf 
 Identifier    ZNB-1998-53b-0881 
 Volume    53 
10Author    BerndW. Rackmeyer1 ', Saqib Alib, Wolfgang Storch0, Martina VosteencRequires cookie*
 Title    2-[N,N-Bis(trimethylstannyl)amino]pyridine and Bis[N-(N-trimethyIsiIyI- 2-aminopyridyI)]dimethyltin -Intramolecular N-Sn Co-ordination  
 Abstract    2-[N,N-Bis(trimethylstannyl)amino]pyridine (1), bis[N-(N-trimethylsilyl-2-aminopyridyl)]-dimethyltin (2) and bis[N-(N-trimethylsilyl-2-amino-3-methyl-pyridyl)]dimethyltin (3) were prepared and characterized by 'H, i3C, l5N, 29Si and ll9Sn NMR spectroscopy. In the case of 1, intramolecular pyridine-N-Sn co-ordination was established by the low temperature ll9Sn NMR spectra which show two resonance signals, one for a penta-co-ordinate and one for a tetra-co-ordinate tin site. In the cases of 2 and 3, intramolecular pyridine-N-Sn co-ordination follows conclusively from l3C, l5N and ll9Sn NMR parameters. In contrast with the known behaviour of the corresponding trimethyltin derivative, the methyl group in 3-position of the pyridine ring does not prevent this type of co-ordination in 3. 
  Reference    Z. Naturforsch. 54b, 1165—1169 (1999); received June 17 1999 
  Published    1999 
  Keywords    Tin, Amines, Pyridine, Co-ordination, NMR Data 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1165.pdf 
 Identifier    ZNB-1999-54b-1165 
 Volume    54 
11Author    T. A. Babushkina, K. G. Konopleva, A. L. Tupoleva, N. U. Venskovskii, L. Guibé, M. Gourdji Tb, A. PéneauRequires cookie*
 Title    NQR Investigation of Intercalates and Complexes of Cadmium and Lead Iodides with Pyridine, Aniline, and Piperidine  
 Abstract    I27 I and 14 N NQR have been investigated in two cadmium idodide -pyridine compounds, the inter-calate CdI 2 +5.9 pyridine and the CdI 2 Py 2 complex. In the intercalate, iodine is mainly ionic and nitro-gen like in pure pyridine; in the complex, iodine exhibits 30% covalency while nitrogen, coordinated to the central cadmium atom of the complex, and presents coupling constants e 2 Qq and r\ smaller than in pure pyridine. The difference between the two compounds is also revealed by the thermal coefficient of the quadrupole coupling constants and the relaxation. Results on the other title compounds are also given. 
  Reference    Z. Naturforsch. 55a, 139—144 (2000); received August 25 1999 
  Published    2000 
  Keywords    Cadmium Iodide, Layered Structure, Intercalation, Pyridine, Nitrogen-14 NQR 
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 TEI-XML for    default:Reihe_A/55/ZNA-2000-55a-0139.pdf 
 Identifier    ZNA-2000-55a-0139 
 Volume    55 
12Author    MichaelW. Zenke, Karl HensenRequires cookie*
 Title    Phasendiagramme und Exzeßvolumina der Systeme (CH^SiCK/Pvridin und (CH3)2CC12/Pyridin  
 Abstract    The isobaric melting and boiling diagrams for the systems: dimethyldichlorosilane/pyridine and 2,2-dichloropropane/pyridine are reproduced. The existence of the incongruently melting addition compounds (CH3)2SiCl2 (Pyridine)2 and [(CH3)2CC12]3 • Pyridine could be proved. Some measurements of the molar volume of mixtures of pyridine and dimethyldichlorosilane, and pyridine and 2,2-dichloropropane are reported. For both systems the molar excess vol­ ume has been calculated as a function of the mole fractions. 
  Reference    Z. Naturforsch. 49b, 412—416 (1994); eingegangen am 20. September 1993 
  Published    1994 
  Keywords    Phase Diagrams, Pyridine, Dimethyldichlorosilane, 2, 2-Dichloropropane, Excess Volumes 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0412.pdf 
 Identifier    ZNB-1994-49b-0412 
 Volume    49 
13Author    MichaelW Z Enke+, Karl HensenRequires cookie*
 Title    Thermodynamische Untersuchungen der Systeme Pyridin/CH3SiCl3 und Pyridin/Cl3C CH3 Thermodynamic Examinations of the Systems Pyridine/CH3SiCl3 and Pyridine/C13CCH3  
 Abstract    The isobaric m elting and boiling diagrams for the systems: pyridine/m ethyltrichlorosilane and pyridine/1,1,1-trichloroethane are reproduced. The existence of the congruently melting addition com pound C H 3SiCl3-(P yridin)2 could be confirm ed. S om e m easu rem en ts o f the m olar volu m e o f m ixtures b etw een pyridine and m ethyltrichlorosilane and pyridine and 1,1,1-trichloroethane, respectively, are reported. For both system s the m olar excess v o l­ um e and for the system pyridine/m ethyltrichlorosilane the m olar excess en th alp ie have b een calculated as a function o f the m ole fractions. 
  Reference    Z. Naturforsch. 48b, 1127 (1993); eingegangen am 19. März 1993 
  Published    1993 
  Keywords    Phase Diagram s, Pyridine, M ethyltrichlorosilane, 1, 1, 1-Trichloroethane, E xcess V alues 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-1127.pdf 
 Identifier    ZNB-1993-48b-1127 
 Volume    48 
14Author    Kumiko Ohtsu, Kazuhiko Ozutsumi, Makoto Kurihara, Takuji KawashimaRequires cookie*
 Title    Thermodynamics of Complexation of Sodium Ion with 12-Crown-4 and 18-Crown-6 in Pyridine  
 Abstract    The complexation of sodium ion with 1,4,7,10-tetraoxacyclododecane (12-crown-4) and 1,4,7,10,13,16-hexaoxacyclooctadecane (18-crown-6) has been studied by titration calorimetry in pyridine (P Y) containing 0.1 mol dm-3 (C2H5)4NC 104 as a constant ionic medium at 25 °C. The calorimetric titration data were well explained in terms of the formation of the [Na(12-crown-4)]+, [Na(12-crown-4)2]+, and [Na(18-crown-6)]+ complexes, and their formation constants, reaction enthalpies, and entropies were determined. The formation of [Na(18-crown-6)]+ is much pronounced in PY over yV,7V-dimethylformamide (D M F) and water, and the stability order is PY > DMF > water. The enthalpy values for the formation of [Na(18-crown-6)]+ are all negative in PY, DMF, and water, and increase in the order PY < DMF < water. The complexation is the least exothermic in water, though sodium ion is the most weakly solvated in water. This is because 18-crown-6 is much stabilized in water by forming hydrogen bonds with water molecules. Despite the stronger electron pair-donat­ ing ability of PY than DMF, the complexation is more exothermic in PY than in DMF. This is ascribed to the different solvation number of the sodium ion in P Y and DMF, i.e., the sodium ion is coordinated with a smaller number of solvent molecules in the former solvent than in the latter. 
  Reference    Z. Naturforsch. 50b, 529—535 (1995); received September 12 1994 
  Published    1995 
  Keywords    Thermodynamics of Complexation, Sodium Complexes, 12-Crown-4, 18-Crown-6, Pyridine 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0529.pdf 
 Identifier    ZNB-1995-50b-0529 
 Volume    50 
15Author    SanaaM. EldinRequires cookie*
 Title    Cyanothioacetamide and its Derivatives in Heterocyclic Synthesis: A New Route for the Synthesis of Several Pyridine and Thieno[2,3-b]pyridine Derivatives and their Biological Evaluation  
 Abstract    Several new pyridine and thieno[2,3-b]pyridine derivatives were synthesized via the reac­ tions of some pyridinethiones, obtained by the action of acetylacetone on some thiocarbox-amidocinnamonitriles, with halogenated esters and ketones. Structures were established based on elemental and spectral data. All the synthesized compounds were tested for their biological activity. 
  Reference    Z. Naturforsch. 54b, 674 (1999); received N ovem ber 9 1998 
  Published    1999 
  Keywords    Pyridines, Thieno[2, 3-b]pyridines, Cyanothioacetamide, Thiocarboxamido-cinnamonitriles, Michael Condensations 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0674.pdf 
 Identifier    ZNB-1999-54b-0674 
 Volume    54 
16Author    M. M. Mashaly3, M. HammoudabRequires cookie*
 Title    New Simple and One-Pot Synthetic Routes to Polyfunctionally Substituted Pyridines; 1,4-Dihydropyridazines and 4H-l,2-Oxazine  
  Reference    Z. Naturforsch. 54b, 1205—1209 (1999); received February 15 1999 
  Published    1999 
  Keywords    Arylidenemalononitriles, 2-Cyano-1, 1 -diaminoethene, Arylhydrazones, s_y«-2-Pyridinealdoxime, Pyridines 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1205.pdf 
 Identifier    ZNB-1999-54b-1205 
 Volume    54