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1978 (361)
121Author    Günter EichingerRequires cookie*
 Title    Zur ionischen Leitfähigkeit gemischter Lithiumiodid-Verbindungen The Ionic Conductivity of Mixed Lithium Iodide Samples  
 Abstract    The ionic conductivity of some polycrystalline samples of the general formula Lil • yXl (y = 1/4 or 1/10) X = Rb+, NH4+, N(CH3)4+, NEt4+) is measured. These mixtures generally exhibit higher activation energies for ionic movement than pure lithium iodide. At temperatures above 50 °C, the overall conductivity is higher them that of pure lithium iodide. 
  Reference    Z. Naturforsch. 33b, 511—515 (1978); eingegangen am 2. März 1978 
  Published    1978 
  Keywords    Lithium Iodide, Alkyl Iodides, Ionic Conductivity 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0511.pdf 
 Identifier    ZNB-1978-33b-0511 
 Volume    33 
122Author    K. Barlos, H. Nöth, B. WrackmeyerRequires cookie*
 Title    4 N-NMR-Untersuchungen an Aminophosphinen 14 N NMR Studies on Aminophosphines  
 Abstract    Aminophosphines, Cyclic Noncyclic, 14 N NMR 14 N chemical shifts of a series of cyclic and noncyclic aminophosphines are reported. The nuclear shielding of nitrogen decreases with increasing number of halogen substituents at phosphorus as well as with increasing number of phosphinyl groups attached to nitrogen. In addition to the influence of electronegativity PN(jr)-interactions may account for the observed shielding. Steric effects are discussed. 
  Reference    Z. Naturforsch. 33b, 515—520 (1978); eingegangen am 2. März 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0515.pdf 
 Identifier    ZNB-1978-33b-0515 
 Volume    33 
123Author    Uwe KlingebielRequires cookie*
 Title    Reaktionen von Lithio-aminofluorsilanen mit Halogensilanen und Trimethylzinnchlorid Reactions of Lithio-aminofluorosilanes with Halogensilanes and Trimethyltinchloride  
 Abstract    Fluorosilanes react with lithium amides and organolithium compounds to give amino-fluorosilanes. (Lithioamino)fluorosilanes are formed by the reaction of aminofluoro-silanes with butyllithium depending on the steric influence and molecular stabilization of the ligands. These lithium salts react with halogensilanes and trimethyltin chloride with substitution. By LiF elimination the lithio-aminofluorosilane C6H5-SiF-NLiC(CH3)3-N(p-C6H4CH3Si(CH3)3) cyclisizes through a (2-j-2)cycloaddition and SiC-H-cleavage. 
  Reference    Z. Naturforsch. 33b, 521—526 (1978); eingegangen am 3. Januar/21. Februar 1978 
  Published    1978 
  Keywords    Lithio-aminofluorosilanes, Substitution, Cyclisation, NMR 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0521.pdf 
 Identifier    ZNB-1978-33b-0521 
 Volume    33 
124Author    Detlev Enterling, Uwe Klingebiel, Anton MelierRequires cookie*
 Title    Substitution und Ringkopplung am Cyclotrisilazan-System Substitution and Ring Coupling at the Cyclotrisilazane System  
  Reference    Z. Naturforsch. 33b, 527—532 (1978); eingegangen am 9. Januar/21. Februar 1978 
  Published    1978 
  Keywords    Cyclotrisilazanes, Substitution, Fluorosilanes, Ring Coupling, Borazine 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0527.pdf 
 Identifier    ZNB-1978-33b-0527 
 Volume    33 
125Author    Tetraphenylphosphonium-Isopolymolybdates, Roger Grase, Joachim FuchsRequires cookie*
 Title    Über Tetraphenylphosphonium-Isopolymolybdate  
 Abstract    From acidified sodium molybdate solutions mixtures of two polymolybdates are precipitated by addition of tetraphenylphosphonium ions. The pure compounds obtainable by separation with selective organic solvents were identified analytically and by their vibrational spectra as octamolybdate, [P(C6Hs)4]4Mo8026, with "Lindqvist structure" and as hexamolybdate, [P(C6Hs)4Mo60i9. They are characterized by their UV-VIS spectra and X-ray powder patterns. The precipitation of the hexamolybdate from strong acidic solution can be used analytically for the determination of molybdenum. 
  Reference    Z. Naturforsch. 33b, 533—536 (1978); eingegangen am 20. Januar 1978 
  Published    1978 
  Keywords    Isopolymolybdates, Preparation, Vibrational Spectra, X-ray, UV 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0533.pdf 
 Identifier    ZNB-1978-33b-0533 
 Volume    33 
126Author    Egbert Keller, Heinrich VahrenkampRequires cookie*
 Title    Stereochemie der Metall-Metall-Bindung: Darstellung und Struktur von Co2(CO)4C5H5P(CH3)2  
 Abstract    The title complex 4 was prepared from 7?-C3H5Co(CO)3 and »/-C5H5(CO)Co-P(CH3)2H. It completes the series of PR2-and AsR2-bridged homodinuclear complexes C^CO^CsHs-As(CH3)2, Mn2(CO)6C5H5As(CH3)2, and Fe2(CO)5C5H5P(CH3)2. Its crystal structure ana-lysis reveals the systematic variation of the ligand distribution along the series which depends only on the number of ligands present and not on given coordination geometries. The metal-metal bond length in 4 is mainly determined by the stereochemical require-ments of the bridging phosphido ligand. 
  Reference    Z. Naturforsch. 33b, 537—541 (1978); eingegangen am 27. Februar 1978 
  Published    1978 
  Keywords    Dinuclear Complexes, Metal-Metal Bonds, Stereochemistry 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0537.pdf 
 Identifier    ZNB-1978-33b-0537 
 Volume    33 
127Author    Dieter Sellmann, Alfred Brandl, Ralf EndeilRequires cookie*
 Title    Wolfram-Carbonylkomplexe mit Stickstoff-Wasserstoff-Liganden [1] Tungsten Carbonyl Complexes with Nitrogen Hydride Ligands [1]  
 Abstract    Tungsten Nitrogen Hydride Complexes Synthesis, properties and reactions of [(OC)5W]2N2H2, [(OC)5W]2N2H4, (OC)5WN2H4, (OC)5WNH3, [(OC)4P03W]2N2H4, [(OC)4P03WN2H4], [(OC)5W-N2H2-W(CO)4P03], [(OC)5W-N2H2-W(CO)4P(CH3)3] and [(OC^WNHCHgNHCeHs] are reported. The hydrazine complexes are synthesized by ligand exchange from the corresponding tetra-hydrofuran complexes. Oxidation by various oxidizing agents yields the diazene complexes, in most cases very low yields. Substitution of CO by phosphanes leads to reduced stability of the compounds. All complexes undergo base catalysed H-D exchange yielding the corresponding ND derivatives; the diazene complexes show a much faster exchange than the corresponding hydrazine and ammonia complexes, which is explained by the higher acidity of the N2H2 protons. The diazene complexes disproportionate under base catalysis to hydrazine and dinitrogen compounds, the latter of which loose the N2 ligand immedi-ately. The diazene ligand of [(OC)sW]2N2H2 cannot be alkylated by reactions with (CH3)2S04, LiCH3 or CH2N2; instead, LiCH3 as well as CH2N2 cause disproportionation to N2H4 and N2 complexes. UV irradiation of [(OC)sW]2N2H2 in THF leads to substitution of CO by THF. The THF complexes can be converted to the phosphane substituted diazene complexes. The IR, UV-VIS and *H NMR spectra of the (OC)sW complexes are nearly identical to those of the analogous Cr and Mo compounds. The unsymmetrical phosphane diazene complexes, however, show a quartet of the N2H2 protons in the X H NMR spectra with coupling constants of 25-26 Hz for the protons on the NN double bond. This value points to a trans configuration of the diazene ligand and its complexes respectively. 
  Reference    Z. Naturforsch. 33b, 542—553 (1978); eingegangen am 1. Februar 1978 
  Published    1978 
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 Identifier    ZNB-1978-33b-0542 
 Volume    33 
128Author    A. Zayed, J. MetriRequires cookie*
 Title    Benzo-benzothiopyranoquinoline Derivatives of Possible Antiparasitic Activity  
 Abstract    Benzo-benzothiopyranoquinoline, Benzoquinoline, Synthesis, Reactions, Antiparasitic Activity For possible antiparasitic activity, benzo-benzothiopyranoquinoline-6-malonaldehyde was synthesized and condensed with hydrazine hydrate, Phenylhydrazine and/or O-phenyle-nediamine. This afforded pyrazole, phenylpyrazole and diazepin derivatives respectively. 
  Reference    Z. Naturforsch. 33b, 554—556 (1978); received January 5 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0554.pdf 
 Identifier    ZNB-1978-33b-0554 
 Volume    33 
129Author    Ivan Juchnovski, Rositza Kuzmanova, Jordan Tsenov, Jose Kaneti, Ivan BinevRequires cookie*
 Title    Structural Effects on Nitrile Infrared Integrated Intensities of Alpha,Beta-Diaryl Cyanoethylenes: Hammett and Quantum Chemical Approaches  
 Abstract    Cyanostilbenes, IR The nitrile infrared intensities of a series of a,)S-diaryl cyanoethylenes were juxtaposed to the associated substituent constants, HMO and SCF-MO indices and fair to excellent correlations were established. The competitive resonance of the nitrile group with alpha-and beta-aryl substituents is discussed. HMO calculations were used to estimate the steric hindrance to conjugation caused by polycyclic substituents and SCF-MO calculations were made to obtain uniform predictions of nitrile intensities and frequencies for hetero-cyclic derivatives of acrylonitrile. 
  Reference    Z. Naturforsch. 33b, 557—563 (1978); received December 30 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0557.pdf 
 Identifier    ZNB-1978-33b-0557 
 Volume    33 
130Author    Klaus Beneke, Gerhard LagalyRequires cookie*
 Title    bildenden Nebengruppenelemente mit Kationenaustauschvermögen Layer Compounds of Polyanion-Forming Transition Elements with Cation Exchange Capacity  
  Reference    Z. Naturforsch. 33b, 564—566 (1978); eingegangen am 1. März 1978 
  Published    1978 
  Keywords    Cation Exchange, Poly anions, Transit ion Elements, Lay er Structure 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0564_n.pdf 
 Identifier    ZNB-1978-33b-0564_n 
 Volume    33 
131Author    Hans-Dieter Hausen, Herbert Binder, Wolfgang SchwarzRequires cookie*
 Title    Die Kristallstruktur von Tetramethylstiboniumtetrachlorogallat [(CH3)4Sb] + [GaCl4]- The Crystal Structure of Tetramethylstibonium Tetrachlorogallate [(CH3)4Sb]+[GaCl4]  
 Abstract    Tetramethylstiboniumtetrachlorogallate crys-tallizes in the hexagonal space group P6smc with two formula units per cell. The lattice constants are a=b = 768.8 pm and c= 1251.2 pm. The structure shows isolated cationic and anionic tetrahedra, which are only slightly distorted. The averaged bond lengths are: Sb-C 212.6 pm and Ga-Cl 217.2 pm. In good agreement with the short Ga-Cl distance (the shortest of all compounds ((CH3)nGaCl4_B)~; n = 1-3) are the measured ionization energies of Ga-3d-electrons and the calculated Pauling Qp-values. 
  Reference    Z. Naturforsch. 33b, 567—569 (1978); eingegangen am 1. März 1978 
  Published    1978 
  Keywords    Tetramethylstibonium, Tetrachlorogallate, Crystal Structure, X-ray 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0567_n.pdf 
 Identifier    ZNB-1978-33b-0567_n 
 Volume    33 
132Author    Michael BinnewiesRequires cookie*
 Title    Darstellung, Kristallstruktur und Eigenschaften von Au7Pi0I Formation, Crystal Structure and Properties of AuvPioI  
 Abstract    Formation of AU7P10I, X-ray, Properties AU7P10I can be prepared by chemical trans-port with iodine in a temperature gradient 900 °C 450 °C. The crystal structure has been determined. The compound shows metallic conductivity; its thermal stability has been studied. 
  Reference    Z. Naturforsch. 33b, 570—571 (1978); eingegangen am 3. März 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0570_n.pdf 
 Identifier    ZNB-1978-33b-0570_n 
 Volume    33 
133Author    Hubert Schmidbaur, Peter HollRequires cookie*
 Title    Die Reaktion eines gemischten Doppelylids mit Ethylenoxid Reaction of a Mixed Double Ylide with Ethylene Oxide  
 Abstract    Dimethyl-trimethylphosphinimino-methylene-phosphorane, (CH3)3P=N-P(CH3)2 = CH2 was found to react with ethylene oxide to form a 1:1 adduct, that was identified as 2,2-dimethyl-2-trimethylphosphinimino -1,2 A 5 -oxaphospholane. According to its 1 H, 13 C, 31 P NMR spectra it is assigned a rigid trigonal bipyramidal structure with nitrogen and oxygen atoms in axial positions. 
  Reference    Z. Naturforsch. 33b, 572—573 (1978); eingegangen am 28. Februar 1978 
  Published    1978 
  Keywords    Ylides, Ethylenoxide, 1, 2-Oxaphospholane 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0572_n.pdf 
 Identifier    ZNB-1978-33b-0572_n 
 Volume    33 
134Author    Ulrich Hermann, Morteza Yaktapour, Claus BliefertRequires cookie*
 Title    CH3(CH2)nS02NH0H (n = 1, 2, 3) Alkylsulfonyl Hydroxylamines CH3(CH2)nS02NH0H (»= 1. 2. 3)  
 Abstract    Hydroxamic Acids, Hydroxylamine Some properties of alkylsulfonyl hydroxyl-amines CH3(CH2)nS02NH0H (n = 1. 2. 3), pre-pared by reaction of the sulfonyl chlorides and hydroxylamine, are reported. 
  Reference    Z. Naturforsch. 33b, 574 (1978); eingegangen am 30. März 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0574_n.pdf 
 Identifier    ZNB-1978-33b-0574_n 
 Volume    33 
135Author    Nils Wiberg, Gerhard HüblerRequires cookie*
 Title    Über Derivate des Hydrazins, VIII [1] Bis(trimethylsilyl)amino-isocyanat und -isothiocyanat  
 Abstract    Aminoisocyanate, Aminoisothiocyanate, Adducts of Heterocumulenes, Lithium Silylhydrazides Bis(trimethylsilyl)aminoisocyanate (1) is formed by reaction of the hydrazides LiN2(SiMe3)3 or Li2N2(SiMe3)2 with phosgene. Bis(trimethylsilyl)aminoisothiocyanate (2) is obtained by thermolysis of the hydrazide (Me3Si)3N2CSSLi, which is readily prepared from LiN2(SiMe3)3 and carbon disulfide. (It is generally found that LiN2(SiMe3)3 and Li2N2(SiMe3)2 add to heterocumulenes X=C=Y (X = TosN, O, S; Y = 0, S), and that reaction of the addition products with Me3SiCl yields (Me3Si)3N2CXYSiMe3. While 1 is obtained solely as a thermostable dimer, 2 is a thermolabile monomer). Thermolysis of 2 at ambient temperature yields (Me3Si)4NiC2S and (Me3Si)4NiC2S3. Thermolysis of 2 in ether solution at elevated temperatures mainly yields bis(trimethylsilyl)carbodiimide and sulfur. 
  Reference    Z. Naturforsch. 33b, 575—582 (1978); eingegangen am 27. Februar 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0575.pdf 
 Identifier    ZNB-1978-33b-0575 
 Volume    33 
136Author    WilliamS. Sheldrick, Alfred Schmidpeter, Thomas Von CriegernRequires cookie*
 Title    Die Kristallstruktur von 2.2'-Bipyridin-bis(brenzkatechyl)phosphoniiim- hexafluorophosphat Crystal Structure of 2,2'-Bipyridine-bis(o-phenylenedioxy)phosphonium Hexafluorophosphate  
 Abstract    2,2'-Bipyridine-bis(o-phenylenedioxy)phosphonium hexafluorophosphate crystallises in the monoclinic space group C2/c (Z = 8) with a = 18.654(4), b = 10.131(2), c = 24.344(4) A, ß = 99.53(4)°. The cationic phosphorus atom displays an octahedral coordination slightly distorted towards the tetrahedral one of an uncomplexed phosphonium center. The OPO bond angles are between 91.6 and 95.7(2)°, the NPN angle of the bipyridine chelate ring in contrast is only 81.7(2)°. The ring systems of the bipyridine ligand are inclined slightly to one another at an angle of 4.7°. The bond lengths to the cationic phosphorus are P-0 1.668-1.672(3), P-N 1.896(4) and 1.898(4) A. The hexafluorophosphate anion is disordered. 
  Reference    Z. Naturforsch. 33b, 583—587 (1978); eingegangen am 30. März 1978 
  Published    1978 
  Keywords    Hexacoordinate Cationic Phosphorus, Octahedral Distortion, Bipyridine Chelate, Benzodioxaphosphole Ring, Coordinative PN Bond Distance 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0583.pdf 
 Identifier    ZNB-1978-33b-0583 
 Volume    33 
137Author    Y. Sudhakara Babu, H. Manohar, K. Ramachandran, S. S. KrishnamurthyRequires cookie*
 Title    The Crystal Structure of a Spirocyclic Cyclophosphazene N3P3(NM e2)4(NHCH2CH2NH) -Evidence for Intermolecular Hydrogen Bonding  
  Reference    Z. Naturforsch. 33b, 588—589 (1978); received February 21 1978 
  Published    1978 
  Keywords    Tetrakis(dimethylamino)(ethylenediamino)cyclotriphosphazene, X-ray, Crystal Structure, Spirocyclic Structure, Envelope Conformation 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0588.pdf 
 Identifier    ZNB-1978-33b-0588 
 Volume    33 
138Author    Gerhard Savelsberg, Herbert SchäferRequires cookie*
 Title    Darstellung und Kristallstruktur von K3Cu3P2 On the Preparation and Crystal Structure of K3CU3P2  
 Abstract    K3CU3P2 was obtained by melting potassium, copper and red phosphorus in an sealed copper vessel. The compound crystallizes trigonally with a = 572 ± 2 pm, c = 1993 ± 3 pm, R3m, Z = 3. The structure analysis revealed nets of puckered 12-membered rings in which the Cu-atoms are linearly coordinated while the P-atoms are located on the apices of trigonal pyramids. 
  Reference    Z. Naturforsch. 33b, 590—592 (1978); eingegangen am 17. März 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0590.pdf 
 Identifier    ZNB-1978-33b-0590 
 Volume    33 
139Author    Klaus Volk, Wiking MüllerRequires cookie*
 Title    Li5NaSn4 -eine Phase mit gewellten Sn-Sechsecknetzen LisNaSiu -a Phase with Puckered Nets of Six-Membered Sn-Rings  
 Abstract    The new compound LisNaSiu has been prepared and its crystal structure determined. It crystallizes trigonal, a = 471.0 ± 0.6 pm, c = 3172 ± 5 pm, space group R3m-C3V. Half of the Sn atoms build up a puckered net of connected six-membered rings, the other half is bound to the net atoms, forming a tetrahedral Sn-Sn coordination for these. The structural relations of this Sn sublattice to the diamond lattice are discussed. Einführung 
  Reference    Z. Naturforsch. 33b, 593—596 (1978); eingegangen am 17. März 1978 
  Published    1978 
  Keywords    Intermetallic Compound, Alkaline Stannide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0593.pdf 
 Identifier    ZNB-1978-33b-0593 
 Volume    33 
140Author    Gerhard Thiele, Peter HilfrichRequires cookie*
 Title    Über Cyanatomercurate M2Hg3(NCO)8 (M = K, Rb, Cs) - Synthesen, Kristallstrukturen und Schwingungsspektren On Cyanatomercurates M2Hg3(NCO)8 (M = K, Rb, Cs) - Syntheses, Crystal Structures and Vibrational Spectra  
 Abstract    By mixing aqueous solutions of Hg(CH3COO)2 and MOCN (M = K, Rb, Cs) the tri-clinic compounds M2Hg3(NCO)8 are formed. In a first approximation the crystal structure analysis indicates isolated Hg(NCO)2 molecules besides K+ and NCO~ ions. As in the range of van der Waals radii additional NCO-neighbours are noticed the mercury atoms are surrounded by distorted octahedra. The octahedra around 2/3 of the Hg form infinite chains as in KHg(NCO)3 which are linked together by additional Hg(NCO)2 molecules. Therefore the compound can be formulated as a double salt 2 KHg(NCO)3 • Hg(NCO)2. The vibrational spectrum is discussed. Rb2Hg3(NCO)8 is isotypous while the caesium salt has a double cell volume. 
  Reference    Z. Naturforsch. 33b, 597—602 (1978); eingegangen am 20. März 1978 
  Published    1978 
  Keywords    Cyanatomercurate, Cyanato Complexes, Crystal Structure, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0597.pdf 
 Identifier    ZNB-1978-33b-0597 
 Volume    33 
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