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1978 (361)
101Author    M. I. Ali, M.M S El-Morsy, N. M. Hassan, M. SharafRequires cookie*
 Title    Synthesis and Some Reactions of Naphthoylacetanilides  
 Abstract    Naphthoylacetanilides The structure of some naphthoylacetanilides (1) obtained from a new route of synthesis is elucidated via inspection of IR, NMR, and mass spectral data. Napthoylacetanilides condensed with one or two moles of aromatic aldehyde to give 2-(naphthoyl)-cinnamanili-des (2) or 3-aryl-2,2'-dinaphthoyl-glutaric acid dianilides (3). Compound 2b added phenylmercaptan to give 3-phenyl 3-phenylthio-2-naphthoyl-propananilide (4). Reduction of 2b gave 2-benzyl 2-(2-naphthoyl)acetanilide (5). 1 is coupled with aryldiazonium salt to give 2-oxo naphthoylacetanilides-2-arylhydrazones (6). The mechanism of the reactions is discussed. 
  Reference    Z. Naturforsch. 33b, 425—428 (1978); received December 12 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0425.pdf 
 Identifier    ZNB-1978-33b-0425 
 Volume    33 
102Author    Helga Wittmann, Hannes SiegelRequires cookie*
 Title    Betaine als Zwischenprodukte der Umlagerung eines Spiro-oxirans in ein Dioxolen Betaines as Intermediates in the Rearrangement of a Spiro-oxiran into a Dioxolen 2,4-Dioxo-1-phenyl-1,2,3,4-tetrahydroquinoline-3-spiro-2'-oxirane, 3,4-Methylendioxy-1 -phenyl-1,2-dihydro-2-quinolone, tert-Amines Enolbetaines  
  Reference    Z. Naturforsch. 33b, 429—432 (1978); eingegangen am 28. November 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0429.pdf 
 Identifier    ZNB-1978-33b-0429 
 Volume    33 
103Author    Marco Cereghetti, Hanspeter ScherrerRequires cookie*
 Title    Arthur Boiler  
 Abstract    The synthesis and mesomorphic properties of four classes of cyano-substituted diphenyl -and biphenylyl-pyrimidines are reported. The new compounds are colourless, chemically and photochemically stable and have wide mesomorphic ranges. The synthesis of one member of each homologous series is described in detail. 
  Reference    Z. Naturforsch. 33b, 433—438 (1978); received December 22 1977 
  Published    1978 
  Keywords    Liquid Crystals, Diphenyl-pyrimidines, Biphenylyl-pyrimidines, Mesophases 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0433.pdf 
 Identifier    ZNB-1978-33b-0433 
 Volume    33 
104Author    Volker Böhmer, Klaus WörsdörferRequires cookie*
 Title    Nachbargruppeneffekte bei der Aminolyse von Estern, II Die Aminolyse von 2-(2-Hydroxybenzyl)phenylacetaten Neighboring Group Effects in the Aminolysis of Esters, II The Aminolysis of 2-(2-Hydroxybenzyl)phenylacetates  
 Abstract    The aminolysis of 2-(2-hydroxybenzyl)phenyl acetates with w-butylamine in dioxane is much faster than for the corresponding 2-(2-methoxybenzyl)phenyl acetates or 2-methyl-phenyl acetates. The kinetic results can be explained by two equivalent mechanisms. Both of them include the formation of a l:l-complex between 2-(2-hydroxybenzyl)phenyl acetate and n-butylamine which is formed in an equilibrium. The reaction of this complex according to a second order rate law seems to be more probable than the reaction of the free ester according to a third order rate law. 
  Reference    Z. Naturforsch. 33b, 439—449 (1978); eingegangen am 30. Dezember 1977 
  Published    1978 
  Keywords    Kinetics, Aminolysis, Aprotic Solvent, Neighboring Group Effects, 2 -(2 -Hy droxybenzy 1 )phenylacetates 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0439.pdf 
 Identifier    ZNB-1978-33b-0439 
 Volume    33 
105Author    A. M. Qureshi, A. N. PatelRequires cookie*
 Title    The Nature of Zolon Red  
 Abstract    Pyrazolone Dye, Zolon Red Zolon red is an acid dye obtained in the enol form as the stable condensation product of glutaconic aldehyde with two molecules of l-phenyl-3-methylpyrazol-5-one. Silver(l) replaces the hydroxylhydrogen of the dye to give deep blue precipitate of silver-zolon red compound. 
  Reference    Z. Naturforsch. 33b, 450—453 (1978); received November 28 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0450.pdf 
 Identifier    ZNB-1978-33b-0450 
 Volume    33 
106Author    Maria Konieczny, George SosnovskyRequires cookie*
 Title    Novel Aspects in the Preparation of Phorone  
 Abstract    The condensation of acetone using anhydrous hydrogen chloride results after three weeks at room temperature, in a 15% yield of phorone (4) and a 75% yield of mesityl oxide (5). In the presence of one weight percent of the Lewis acid, aluminium chloride, the yield of 4 is increased to 39%. An increase in the amount of the Lewis acid, aluminium chloride, to ten weight percent results in a 22% yield of phorone (4) and a 68% yield of mesityl oxide (5). In the presence of one hundred weight percent of aluminium chloride, (CH3)2C = CHC CHr C(CH3)2 (CH3)2 C=CHCCH3 
  Reference    Z. Naturforsch. 33b, 454—460 (1978); received Januaiy 4 1978 
  Published    1978 
  Keywords    Phorone, Mesityl Oxide, Triacetoneamine, Nitroxyls 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0454.pdf 
 Identifier    ZNB-1978-33b-0454 
 Volume    33 
107Author    Christoph Matz, Rainer MattesRequires cookie*
 Title    Preparation and Structure of Potassium 1,2-Diselenooxalate  
 Abstract    1,2-Diselenooxalate K2[OSeC-CSeO] crystallizes in the space group P2i/n with two formula units per unit cell. The 1,2-diselenooxalate anion has a trans-planar conformation. The C-Se distance is 1.87(1)A. 
  Reference    Z. Naturforsch. 33b, 461—462 (1978); eingegangen am 12. Januar 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0461_n.pdf 
 Identifier    ZNB-1978-33b-0461_n 
 Volume    33 
108Author    Klaus-Jürgen Range, Manfred ZabelRequires cookie*
 Title    e-In2S3, eine Hochdruckmodifikation mit Korundstruktur £-In2S3, a High Pressure Modification with Corundum Type Structure  
 Abstract    A quenchable high pressure modification of In2S3 was prepared at_35kbar and 500 °C. e-In2S3 (Space group R3c, a = 656,1 pm, c = 1757.0 pm, Z = 6) is isotypic with Lu2S3 (Corundum type structure). 
  Reference    Z. Naturforsch. 33b, 463—464 (1978); eingegangen am 19. Januar 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0463_n.pdf 
 Identifier    ZNB-1978-33b-0463_n 
 Volume    33 
109Author    Requires cookie*
 Title    Darstellung  
 Abstract    und Struktur von (Di)kalium[sulfeno-thioxoacetat (2-)], K2[02C-C(S)S0] . H20, dem Salz einer gemischten 0. S-Persäure 
  Reference    Z. Naturforsch. 33b, 465 (1978) 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0465_n.pdf 
 Identifier    ZNB-1978-33b-0465_n 
 Volume    33 
110Author    OttoJ. Scherer, Kurt AndresRequires cookie*
 Title    CM-und lrarts-1.3-Diisopropyl-2.4-bis- (diisopropylamino)-1.3.2.4-diazadiphosphe- tidin Cis-and £ra?w-l,3-Diisopropyl-2,4-bis- (diisopropylamino)-1,3,2,4-diazadi- phosphetidine  
 Abstract    cis-irans-Diazadiphosphetidines, Separation, NMR Thermolysis of the silylated diaminochloro-phosphine (1) yields the cis-and irans-diazadi-phosphetidines (2). These isomers show a great difference in the melting points and 31 P-NMR spectra. Hindered P-N rotation is observed for trans-2 b. 
  Reference    Z. Naturforsch. 33b, 467—468 (1978); eingegangen am 26. Januar 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0467_n.pdf 
 Identifier    ZNB-1978-33b-0467_n 
 Volume    33 
111Author    Atta-Ur-Rahman, Sadiqa Firdous, Anwer BashaRequires cookie*
 Title    Alkaloids, IX* Some Aspects of the Chemistry of C atliar anthine  
 Abstract    Vinblastine and Vincristine are binary indole-indoline alkaloids occurring in traces in the leaves of Vinca rosea. They are among the most powerful chemotherapeutic agents available to man for the treatment of a variety of cancers. Their high cost and complexity of structure has attracted the attention of many eminent chemists towards their synthesis. The first synthesis of both these anta'-tumour alkaloids was reported by us last year [7] starting from two major alkaloids, catharanthine and vindo-line, which co-occur in the same plant. Some aspects of the chemistry of catharanthine are now presented including a novel one-step de-carbomethoxylation reaction with H2S in glacial acetic acid and a reversible isomerization of catharanthine with sodium borohydride. A study of the life-time of catharanthine in hot glacial acetic acid substantiates the earlier work of the Anglo-French group on the biosynthesis of indole alkaloids. 
  Reference    Z. Naturforsch. 33b, 469—470 (1978); received December 5 1977 
  Published    1978 
  Keywords    Vinblastine, Vincristine, Decarbomethoxylation, anti-Cancer Drugs, Indole Alkaloids 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0469_n.pdf 
 Identifier    ZNB-1978-33b-0469_n 
 Volume    33 
112Author    Ulrich Wannagat, Gerd EiseleRequires cookie*
 Title    Neue Silaza-und Silaoxaza-spiro[4.4]nonane und [4.5]decane* Novel Silaza-and Silaoxaza-spiro[4,4]nonanes and [4,5]decanes  
 Abstract    The formerly unknown spiro systems C-F (Scheme I) with silicon in the spiral center and C, Si, N and O in the framework were synthesized via reactions 2-6 and confirmed in their structure by elemental analysis and spectroscopic data (Table I). 
  Reference    Z. Naturforsch. 33b, 471—474 (1978); eingegangen am 28. Februar 1978 
  Published    1978 
  Keywords    Preparation, Properties, Spiranes, Structure 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0471.pdf 
 Identifier    ZNB-1978-33b-0471 
 Volume    33 
113Author    Ulrich Wannagat, Gerd EiseleRequires cookie*
 Title    Ringschlußversuche mit Phenylborsäure* Attempts for Synthesis of Inorganic Rings with Phenylboric Acid  
 Abstract    The inorganic ring systems BNC>2Si2 (B) and BC>3Si4 (E) were prepared for the first time via equations (1) and (5), system BC>3Si2 (C) enlarged by preparation of compound C 1 via eq. (4). Synthesis of a system BC>2Si2 (D) failed as well as preparation of five and seven membered building units VI and VIII. For bis(trimethylsiloxy)phenylborane (IX) detailed and additional information about preparation, properties and structure analysis is given. Compound VTI, CsH^NOSi, was obtained for the first time via eq. (7) and described in its properties. 
  Reference    Z. Naturforsch. 33b, 475—478 (1978); eingegangen am 28. Februar 1978 
  Published    1978 
  Keywords    Preparation, Properties, Inorganic Ring Systems, Structure 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0475.pdf 
 Identifier    ZNB-1978-33b-0475 
 Volume    33 
114Author    Jürgen FennerRequires cookie*
 Title    Die Kristallstruktur des Zinnsulfidiodids Sn4SI6 The Crystal Structure of S114SI6  
 Abstract    The new ternary tin(II) sulfide iodide SnjSIß was prepared by annealing of stoichio-metric amounts of S11I2 and SnS at 280 °C. The structure of this compound was determined from three-dimensional X-ray data. The cell parameters for the monoclinic phase are a = 14.129, b = 4.425, c = 25.15Ä, and £ = 93.42°; space group C2/m (No. 12), Z = 4. Parts of the structure are built up of the Snl2 structure. 
  Reference    Z. Naturforsch. 33b, 479—481 (1978); eingegangen am 6. Februar 1978 
  Published    1978 
  Keywords    Tin(II) Sulfide Iodide, Preparation, Crystal Structure 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0479.pdf 
 Identifier    ZNB-1978-33b-0479 
 Volume    33 
115Author    Manfred Spangenberg, Weif BrongerRequires cookie*
 Title    KaPtSig, Synthese und Kristallstruktur K2PtSi5, Synthesis and Crystal Structure  
 Abstract    Crystal Structure, Ternary Poly sulfides K2PtSi5 can be synthesized from solutions of potassium polysulfide and hexachloro-platinic acid. X-ray investigations on single crystals revealed its structure. Similar to the ammonium salt (NH^PtSis 2 H2O, the Pt-atom of the PtSis 2-anion is found in an octahedral environment consisting of three bidentate five-membered sulfur chains. 
  Reference    Z. Naturforsch. 33b, 482—484 (1978); eingegangen am 28. November 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0482.pdf 
 Identifier    ZNB-1978-33b-0482 
 Volume    33 
116Author    Wolfgang Schwarz, Hans-Jürgen GuderRequires cookie*
 Title    Die  
 Abstract    Kristallstruktur des dimeren Dimethylantimontrichlorids und des Tetramethylantimon-hexachloroantimonats [(CH3)2SbCl3]2 und [(CH3)4Sb] + [SbCl6]-Crystal Structure of the Dimeric Dimethylantimony Trichloride and Tetramethylantimony Hexachloroantimonate [(CH3)2SbCl3]2 and [(CH3)4Sb]+[SbCl6]- Dimethylstibonium trichloride (CH3)2SbCl3 exists in two isomeric forms. In the dimeric "covalent" one, [(CH3)2SbCl3]2, two formula units are bridged by chlorine, building a four-membered ring. It crystallizes in the orthorhombic space group Pnma with lattice constants a = 1212.9, b = 1910 and c = 610.2 pm. The mean value of bond length from antimony to the terminal chlorine atoms is 235.5 pm, to the bridging chlorine atoms 280.0 pm and the averaged Sb-C distance is 213.3 pm. The second form [(CH3)4Sb]+[SbCl6] -is an ionic one and crystallizes in the triclinic space group Pi with lattice constants a = 715.6, b = 744.2, c = 1415.2 pm, a = 90.01, ß = 93.39 and y = 106.4°. The mean values of bond lengths are Sb-C 211.5 pm and Sb-Cl 238.2 pm. The tetrahedrical as well as the octahedrical coordination polyhedra are only slightly distorted. 
  Reference    Z. Naturforsch. 33b, 485—488 (1978); eingegangen am 1. März 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0485.pdf 
 Identifier    ZNB-1978-33b-0485 
 Volume    33 
117Author    Hubert Schmidbaur, Peter HollRequires cookie*
 Title    l.l-Dimethyl-l-methoxy-l/ 5 phospholan und -phosphorinan: Synthese, Struktur und dynamisches Verhalten 1,1 -Dimethyl-1-methoxy-lA 5 phospholane and -phosphorinane: Synthesis, Structure and Dynamic Behaviour  
  Reference    Z. Naturforsch. 33b, 489—492 (1978); eingegangen am 28. Februar 1978 
  Published    1978 
  Keywords    Alkoxy-dialkyl-phospholanes, Intermolecular Ligand Exchange, 13 C NMR, X H NMR, 31 P NMR 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0489.pdf 
 Identifier    ZNB-1978-33b-0489 
 Volume    33 
118Author    W. S. Sheldrick, D. Schomburg, W. WolfsbergerRequires cookie*
 Title    Kristall-und Molekülstruktur von N-(TricHorgermyl)-trimethylphosphinimin [Cl3Ge-N=PMe3]", n = 1 und 2 Crystal and Molecular Structure of N-(Trichlorogermyl)-trimethylphosphinimine [Cl3Ge-N=PMe3]n) n= 1 and 2  
 Abstract    X-ray, N-Germylphosphinimine, Pentacoordinate Germanium N-(Trichlorogermyl)trimethylphosphinimine crystallizes in the triclinic space group PI with a = 12.49(2), b = 12.54(3), c = 6.66(1) A,a = 100.96(10),ß = 91.45(14), y = 102.77(15)°. The structure was solved by Patterson and difference syntheses and refined to R = 0.063 for 2867 independent reflections. In the unit cell there are two symmetry related monomers containing tetracoordinated Ge and one crystallographically centrosymmetric dimer with a planar four-membered [GeN]2 ring exhibiting trigonal-bipyramidal pentacoordinated Ge and trigonal N. Significant differences are observed in the bond lengths from penta-coordinated Ge to its equatorial and axial ligands: Ge-Neq 1.837(7), Ge-Nax 1.972(7), Ge-Cleq 2.176(2) and 2.170(2), Ge-Cl ax 2.345(3) A. The Ge—Neq distance is similar to that observed in tetracoordinated derivatives [1.81-1.87 A], whereas the Ge-Nax distance is 0.22 A shorter than that observed for the axial N->Ge coordinate bond in hitherto known pentacoordinated derivatives [2.19-2.24 A]. The very short Ge-N bond length of 1.737(8)A in the monomer which is 0.07 A shorter than in other tetracoordinated derivatives may be indicative of the involvement of a (p-*d)ji component. 
  Reference    Z. Naturforsch. 33b, 493—497 (1978); eingegangen am 3. März 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0493.pdf 
 Identifier    ZNB-1978-33b-0493 
 Volume    33 
119Author    HeinzP. Fritz, Helmut Gebauer, Peter Friedrich, Peter Ecker, Reinhold Artes, Ulrich SchubertRequires cookie*
 Title    Elektrochemische Synthesen, XIV [1] Radikalkation-Salze des Naphthalins Electrochemical Syntheses, XIV [1]. Radical Cation Salts of Naphthalene  
 Abstract    By anodic oxidation of naphthalene in H2CCI2/O.O2 m Bu4NPF6 at —45 °C dark red-violet crystals of (CioHshPFö can be obtained by electrocrystallisation. They are stable at low temperatures, however, decompose on warming. In solution and in the poly-crystalline state these radical cation salts show only narrow e.p.r. signals without h.f.s. The specific conductivity of a polycrystalline pellet at room temperature was determined to be 0.12 ±0.046 Ohm -1 cm -1 . The structure determination of (CioHs^PFe yielded the tetragonal space group P42/n, Z = 2, a = b = 1156(2), c = 640(1) pm. Patterson synthesis and difference Fourier analyses showed the compound to have a columnar stacking of CioHg units the long molecular axes of which are twisted alternately by 90° around a screw axis in c-direction, and the molecular planes of which are 320 pm apart. The PFß -ions have four nearest CioHs neighbours lying in pairs in parallel planes 63 pm above and below that plane of PF6~ perpendicular to the c-axis and containing a PF4 group. This is the first established case for a columnar structure of a pure hydrocarbon radical cation. (CIOH8)2AsF6 is isomorphous. 
  Reference    Z. Naturforsch. 33b, 498—506 (1978); eingegangen am 21. Februar 1978 
  Published    1978 
  Keywords    Naphthalene Radical Cation, X-ray, Columnar Structure, Conductivity 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0498.pdf 
 Identifier    ZNB-1978-33b-0498 
 Volume    33 
120Author    Dainis Dakternieks, Gerd-Volker Röschenthaler, Reinhard SchmutzlerRequires cookie*
 Title    Synthesis of Chiral and Non-chiral Phosphites Containing the Hexafluoroisopropoxy Group  
 Abstract    A series of new phosphorus (III) compounds containing the hexafluoroisopropoxide group has been synthesised by reacting halophosphines with lithium hexafluoroisoprop-oxide. The phosphites Bu<PX[OCH(CF3)2] (where X = F, Cl), Bu«MeP[OCH(CF3)2] and C6HsPF[OCH(CF3)2] each contain a chiral center at phosphorus. 
  Reference    Z. Naturforsch. 33b, 507—510 (1978); received February 13 1978 
  Published    1978 
  Keywords    Phosphites, Halophosphites, Chirality, Lithium Hexafluoroisopropoxide 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0507.pdf 
 Identifier    ZNB-1978-33b-0507 
 Volume    33 
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